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Mathematics, Statistics & Applied Mathematics
Professor Donal O'Regan
MSc, PhD
Contact Details
Personal Professor of Mathematics

Room ADBG006
Áras De Brún
School of Mathematics, Statistics and Applied Mathematics
T: Ext. 3091
E: donal.oregan@nuigalway.ie
W: http://maths.nuigalway.ie/staff/doregan.shtml

Room ADBG006
Áras De Brún
School of Mathematics, Statistics and Applied Mathematics
T: Ext. 3091
E: donal.oregan@nuigalway.ie
W: http://maths.nuigalway.ie/staff/doregan.shtml
Biography
Peer Reviewed Journals
Year  Publication  

(2016)  'Existence results for a Neumann problem involving the $p(x)$Laplacian with discontinuous nonlinearities'
Barletta, Giuseppina and Chinn\`\i (2016) 'Existence results for a Neumann problem involving the $p(x)$Laplacian with discontinuous nonlinearities'. Nonlinear Anal. Real World Appl, 27 :312325 [DOI] [Details] 

(2016)  'Asymptotic behavior of a three species ecoepidemiological model perturbed by white noise'
Zhang, Qiumei and Jiang, Daqing and Liu, Zhenwen and O'Regan, Donal (2016) 'Asymptotic behavior of a three species ecoepidemiological model perturbed by white noise'. J. Math. Anal. Appl, 433 (1):121148 [DOI] [Details] 

(2015)  'Periodic solution for a nonautonomous LotkaVolterra predatorprey model with random perturbation'
Zu, Li and Jiang, Daqing and O'Regan, Donal and Ge, Bin (2015) 'Periodic solution for a nonautonomous LotkaVolterra predatorprey model with random perturbation'. J. Math. Anal. Appl, 430 (1):428437 [DOI] [Details] 

(2015)  'Some Hardy type inequalities with weighted functions via Opial type inequalities'
Agarwal, Ravi P. and O'Regan, Donal and Saker, Samir H. (2015) 'Some Hardy type inequalities with weighted functions via Opial type inequalities'. Adv. Dyn. Syst. Appl, 10 (1):19 [Details] 

(2015)  'Some new Opial dynamic inequalities with weighted functions on time scales'
Saker, S. H. and Osman, M. M. and O'Regan, D. and Agarwal, R. P. (2015) 'Some new Opial dynamic inequalities with weighted functions on time scales'. Math. Inequal. Appl, 18 (3):11711187 [DOI] [Details] 

(2015)  'Positive solutions for a coupled system of nonlinear fractional differential equations'
Zhang, Keyu and Xu, Jiafa and O'Regan, Donal (2015) 'Positive solutions for a coupled system of nonlinear fractional differential equations'. Math. Methods Appl. Sci, 38 (8):16621672 [DOI] [Details] 

(2015)  'A Kamenevtype oscillation result for a linear $(1+\alpha)$order fractional differential equation'
B\ualeanu, Dumitru and Mustafa, Octavian G. and O'Regan, Donal (2015) 'A Kamenevtype oscillation result for a linear $(1+\alpha)$order fractional differential equation'. Appl. Math. Comput, 259 :374378 [DOI] [Details] 

(2015)  '$\Cal S$asymptotically $\omega$periodic solutions for abstract neutral differential equations'
Pierri, Michelle and O'Regan, Donal (2015) '$\Cal S$asymptotically $\omega$periodic solutions for abstract neutral differential equations'. Electron. J. Differential Equations, [Details] 

(2015)  'Lyapunovtype inequalities for a class of fractional differential equations'
O'Regan, Donal and Samet, Bessem (2015) 'Lyapunovtype inequalities for a class of fractional differential equations'. J. Inequal. Appl, [DOI] [Details] 

(2015)  'Fixed points of conditionally $F$contractions in complete metriclike spaces'
Karap\inar, Erdal and Kutbi, Marwan A. and Piri, Hossein and O'Regan, Donal (2015) 'Fixed points of conditionally $F$contractions in complete metriclike spaces'. Fixed Point Theory Appl, [DOI] [Details] 

(2015)  'Multi$C^*$ternary algebras and applications'
Alsulami, Hamed H. and Kenari, Hassan Morghi and O'Regan, Donal and Saadati, Reza (2015) 'Multi$C^*$ternary algebras and applications'. J. Inequal. Appl, [DOI] [Details] 

(2015)  'Global exponential stabilization of impulsive neural networks with unbounded continuously distributed delays'
Li, Xiaodi and O'Regan, Donal and Akca, Haydar (2015) 'Global exponential stabilization of impulsive neural networks with unbounded continuously distributed delays'. IMA J. Appl. Math, 80 (1):8599 [DOI] [Details] 

(2015)  'Evolution equations with causal operators'
Agarwal, Ravi P. and Arshad, Sadia and Lupulescu, Vasile and O'Regan, Donal (2015) 'Evolution equations with causal operators'. Differ. Equ. Appl, 7 (1):1526 [DOI] [Details] 

(2015)  'Asymptotic properties for Volterra integrodynamic systems'
Mirza, Safia and O'Regan, Donal and Yasmin, Nusrat and Younus, Awais (2015) 'Asymptotic properties for Volterra integrodynamic systems'. Electron. J. Qual. Theory Differ. Equ, [Details] 

(2015)  'Fractional calculus and fractional differential equations in nonreflexive Banach spaces'
Agarwal, Ravi P. and Lupulescu, Vasile and O'Regan, Donal and ur Rahman, Ghaus (2015) 'Fractional calculus and fractional differential equations in nonreflexive Banach spaces'. Commun. Nonlinear Sci. Numer. Simul, 20 (1):5973 [DOI] [Details] 

(2015)  'Global solutions for a new class of abstract neutral differential equations'
Hern\'andez, Eduardo and O'Regan, Donal (2015) 'Global solutions for a new class of abstract neutral differential equations'. Proc. Amer. Math. Soc, 143 (8):35613571 [DOI] [Details] 

(2015)  'Positive solutions for singular nonlocal boundary value problems involving integral conditions with derivative dependence'
Yan, Baoqiang and O'Regan, Donal and Agarwal, Ravi P. (2015) 'Positive solutions for singular nonlocal boundary value problems involving integral conditions with derivative dependence'. An. \c Stiin\c t. Univ. ``Ovidius'' Constan\c ta Ser. Mat, 23 (2):279304 [Details] 

(2015)  'Extremal solutions for nonlinear fractional boundary value problems with $p$Laplacian'
Ding, Youzheng and Wei, Zhongli and Xu, Jiafa and O'Regan, Donal (2015) 'Extremal solutions for nonlinear fractional boundary value problems with $p$Laplacian'. J. Comput. Appl. Math, 288 :151158 [DOI] [Details] 

(2015)  'Stability with respect to initial time difference for generalized delay differential equations'
Agarwal, Ravi and Hristova, Snezhana and O'Regan, Donal (2015) 'Stability with respect to initial time difference for generalized delay differential equations'. Electron. J. Differential Equations, [Details] 

(2015)  'Some new fixed point results via the concept of measure of noncompactness'
Aghajani, Asadollah and Mosleh Tehrani, Alireza and O'Regan, Donald (2015) 'Some new fixed point results via the concept of measure of noncompactness'. Filomat, 29 (6):12091216 [DOI] [Details] 

(2015)  'Generalized Lefschetz fixed point theorems in extension type spaces'
O'Regan, Donal (2015) 'Generalized Lefschetz fixed point theorems in extension type spaces'. J. Nonlinear Sci. Appl, 8 (6):986996 [Details] 

(2015)  'A variational approach to nonlinear logistic equations'
Gasi\'nski, Leszek and O'Regan, Donal and Papageorgiou, Nikolaos S. (2015) 'A variational approach to nonlinear logistic equations'. Commun. Contemp. Math, 17 (3) [DOI] [Details] 

(2015)  'Stability of Caputo fractional differential equations by Lyapunov functions'
Agarwal, Ravi and O'Regan, Donal and Hristova, Snezhana (2015) 'Stability of Caputo fractional differential equations by Lyapunov functions'. Appl. Math, 60 (6):653676 [DOI] [Details] 

(2015)  'Extensions of dynamic inequalities of Hardy's type on time scales'
Saker, S. H. and O'Regan, Donal (2015) 'Extensions of dynamic inequalities of Hardy's type on time scales'. Math. Slovaca, 65 (5):9931012 [DOI] [Details] 

(2015)  'Connected sets of coincidences of nonlinear operators'
O'Regan, Donal (2015) 'Connected sets of coincidences of nonlinear operators'. Nonlinear Anal. Forum, 20 :217228 [Details] 

(2015)  'Positive solutions for nonlinear nonhomogeneous Robin problems'
Gasi\'nski, Leszek and O'Regan, Donal and Papageorgiou, Nikolaos S. (2015) 'Positive solutions for nonlinear nonhomogeneous Robin problems'. Z. Anal. Anwend, 34 (4):435458 [Details] 

(2015)  'Existence of solutions via variational methods for a problem with nonlinear boundary conditions on the halfline'
Frites, Ouidad and Moussaoui, Toufik and O'Regan, Donal (2015) 'Existence of solutions via variational methods for a problem with nonlinear boundary conditions on the halfline'. Dyn. Contin. Discrete Impuls. Syst. Ser. A Math. Anal, 22 (5):395407 [Details] 

(2015)  'On the linearization theorem for nonautonomous differential equations'
Xia, YongHui and Wang, Rongting and Kou, Kit Ian and O'Regan, Donal (2015) 'On the linearization theorem for nonautonomous differential equations'. Bull. Sci. Math, 139 (7):829846 [DOI] [Details] 

(2015)  'Neutral set differential equations'
Abbas, Umber and Lupulescu, Vasile and O'Regan, Donald and Younus, Awais (2015) 'Neutral set differential equations'. Czechoslovak Math. J, 65(140) (3):593615 [DOI] [Details] 

(2015)  'Existence and multiplicity of solutions for a $p(x)$Kirchhoff type problem via variational techniques'
Mokhtari, A. and Moussaoui, T. and O'Regan, D. (2015) 'Existence and multiplicity of solutions for a $p(x)$Kirchhoff type problem via variational techniques'. Arch. Math. (Brno), 51 (3):163173 [DOI] [Details] 

(2015)  'Periodic solutions of superquadratic nonautonomous differential systems with a delay'
Guo, Chengjun and O'Regan, Donal and Wang, Chengjiang and Agarwal, Ravi P. (2015) 'Periodic solutions of superquadratic nonautonomous differential systems with a delay'. Mem. Differ. Equ. Math. Phys, 64 :123141 [Details] 

(2015)  'Hardy's type integral inequalities on time scales'
Saker, S. H. and O'Regan, Donal (2015) 'Hardy's type integral inequalities on time scales'. Appl. Math. Inf. Sci, 9 (6):29552962 [Details] 

(2015)  'Coincidence points for multimaps defined on subsets of Fr\'echet spaces'
Alsulami, Hamed H. and O'Regan, Donal (2015) 'Coincidence points for multimaps defined on subsets of Fr\'echet spaces'. Dynam. Systems Appl, 24 (12):221228 [Details] 

(2015)  'Coincidence points for multivalued maps based on $\Phi$epi and $\Phi$essential maps'
O'Regan, Donal (2015) 'Coincidence points for multivalued maps based on $\Phi$epi and $\Phi$essential maps'. Dynam. Systems Appl, 24 (12):143154 [Details] 

(2015)  'M\onch type results for maps with weakly sequentially closed graphs'
O'Regan, Donal (2015) 'M\onch type results for maps with weakly sequentially closed graphs'. Dynam. Systems Appl, 24 (12):129134 [Details] 

(2015)  'Some new dynamic inequalities on discrete time scales'
Saker, S. H. and O'Regan, Donal and Agarwal, Ravi P. (2015) 'Some new dynamic inequalities on discrete time scales'. Dynam. Systems Appl, 24 (12):113128 [Details] 

(2015)  'Eigenvalue problem for ODEs with a perturbed $q$Laplace operator'
O'Regan, Donal and Orpel, Aleksandra (2015) 'Eigenvalue problem for ODEs with a perturbed $q$Laplace operator'. Dynam. Systems Appl, 24 (12):97111 [Details] 

(2015)  'Structure of the solution set for a partial differential inclusion'
Cheng, Yi and Agarwal, Ravi P. and Ben Amar, Afif and O'Regan, Donal (2015) 'Structure of the solution set for a partial differential inclusion'. Adv. Difference Equ, [DOI] [Details] 

(2015)  'Lyapunov functions and strict stability of Caputo fractional differential equations'
Agarwal, Ravi and Hristova, Snezhana and O'Regan, Donal (2015) 'Lyapunov functions and strict stability of Caputo fractional differential equations'. Adv. Difference Equ, [Details] 

(2015)  'On the existence of fixed points that belong to the zero set of a certain function'
Karapinar, Erdal and O'Regan, Donal and Samet, Bessem (2015) 'On the existence of fixed points that belong to the zero set of a certain function'. Fixed Point Theory Appl, [DOI] [Details] 

(2015)  'Measure of noncompactness in $\rm L^\rm P(\Bbb R^\rm N)$ and applications'
Aghajani, A. and O'Regan, D. and Shole Haghighi, A. (2015) 'Measure of noncompactness in $\rm L^\rm P(\Bbb R^\rm N)$ and applications'. Cubo, 17 (1):8597 [Details] 

(2015)  'Littlewood and Bennett inequalities on time scales'
Saker, S. H. and O'Regan, D. and Agarwal, R. P. (2015) 'Littlewood and Bennett inequalities on time scales'. Mediterr. J. Math, 12 (3):605619 [DOI] [Details] 

(2015)  'Constant sign solutions for parameterdependent superlinear secondorder difference equations'
Candito, Pasquale and D'Agu\`\i (2015) 'Constant sign solutions for parameterdependent superlinear secondorder difference equations'. J. Difference Equ. Appl, 21 (8):649659 [DOI] [Details] 

(2015)  'Existence of homoclinic orbits for a class of firstorder differential difference equations'
Guo, Chengjun and O'Regan, Donal and Xu, Yuantong and Agarwal, Ravi P. (2015) 'Existence of homoclinic orbits for a class of firstorder differential difference equations'. Acta Math. Sci. Ser. B Engl. Ed, 35 (5):10771094 [DOI] [Details] 

(2015)  'Conditions for persistence and ergodicity of a stochastic LotkaVolterra predatorprey model with regime switching'
Zu, Li and Jiang, Daqing and O'Regan, Donal (2015) 'Conditions for persistence and ergodicity of a stochastic LotkaVolterra predatorprey model with regime switching'. Commun. Nonlinear Sci. Numer. Simul, 29 (13):111 [DOI] [Details] 

(2014)  'Multiple and nodal solutions for nonlinear equations with a nonhomogeneous differential operator and concaveconvex terms'
Filippakis, M. E. and O'Regan, D. and Papageorgiou, N. S. (2014) 'Multiple and nodal solutions for nonlinear equations with a nonhomogeneous differential operator and concaveconvex terms'. Tohoku Math. J. (2), 66 (4):583608 [DOI] [Details] 

(2014)  'Fixed points of generalized contractive mappings of integral type'
Alsulami, Hamed H. and Karap\inar, Erdal and O'Regan, Donal and Shahi, Priya (2014) 'Fixed points of generalized contractive mappings of integral type'. Fixed Point Theory Appl, [DOI] [Details] 

(2014)  'Linear impulsive Volterra integrodynamic system on time scales'
Agarwal, Ravi P. and Awan, Abdul Sami and O'Regan, Donal and Younus, Awais (2014) 'Linear impulsive Volterra integrodynamic system on time scales'. Adv. Difference Equ, [DOI] [Details] 

(2014)  'Generalized quasivariational inclusion problems with applications'
Wang, SanHua and Huang, NanJing and O'Regan, Donal (2014) 'Generalized quasivariational inclusion problems with applications'. J. Nonlinear Convex Anal, 15 (6):12611277 [Details] 

(2014)  'Homotopy type results for maps with weakly sequentially closed graphs'
O'Regan, Donal (2014) 'Homotopy type results for maps with weakly sequentially closed graphs'. Dyn. Contin. Discrete Impuls. Syst. Ser. A Math. Anal, 21 (34):355360 [Details] 

(2015)  'A variational approach to multiplicity results for boundaryvalue problems on the real line'
Bonanno, Gabriele and Barletta, Giuseppina and O'Regan, Donal (2015) 'A variational approach to multiplicity results for boundaryvalue problems on the real line'. Proc. Roy. Soc. Edinburgh Sect. A, 145 (1):1329 [DOI] [Details] 

(2015)  'Existence of homoclinic orbits of superquadratic secondorder Hamiltonian systems'
Guo, Chengjun and O'Regan, Donal and Wang, Chengjiang and Agarwal, Ravi P. (2015) 'Existence of homoclinic orbits of superquadratic secondorder Hamiltonian systems'. Z. Anal. Anwend, 34 (1):2741 [DOI] [Details] 

(2015)  'Periodic solutions for forced vibrations of wave equation with general nonlinearities: the multidimensional case'
Nowakowski, Andrzej and O'Regan, Donal (2015) 'Periodic solutions for forced vibrations of wave equation with general nonlinearities: the multidimensional case'. Appl. Anal, 94 (2):400409 [DOI] [Details] 

(2015)  'Converses of Copson's inequalities on time scales'
Saker, S. H. and O'Regan, D. and Agarwal, R. P. (2015) 'Converses of Copson's inequalities on time scales'. Math. Inequal. Appl, 18 (1):241254 [DOI] [Details] 

(2015)  'Continuation principles based on essential maps and topological degree'
O'Regan, Donal (2015) 'Continuation principles based on essential maps and topological degree'. Appl. Anal, 94 (5):10321041 [Details] 

(2015)  'Generalized wellposedness for symmetric vector quasiequilibrium problems'
Zhang, Weibing and Huang, Nanjing and O'Regan, Donal (2015) 'Generalized wellposedness for symmetric vector quasiequilibrium problems'. J. Appl. Math, [DOI] [Details] 

(2015)  'The continuity of linear and sublinear correspondences defined on cones'
Aghajani, M. and Nourouzi, K. and O'Regan, D. (2015) 'The continuity of linear and sublinear correspondences defined on cones'. Bull. Iranian Math. Soc, 41 (1):4355 [Details] 

(2015)  'Fixed point theory for cyclic weak Kannan type mappings'
Agarwal, Ravi P. and Alghamdi, Maryam A. and O'Regan, Donal and Shahzad, Naseer (2015) 'Fixed point theory for cyclic weak Kannan type mappings'. J. Indian Math. Soc. (N.S.), 82 (12):1121 [Details] 

(2015)  'Multiple solutions for a class of fractional Hamiltonian systems'
Xu, Jiafa and O'Regan, Donal and Zhang, Keyu (2015) 'Multiple solutions for a class of fractional Hamiltonian systems'. Fract. Calc. Appl. Anal, 18 (1):4863 [DOI] [Details] 

(2015)  'Nonlinear fractional differential equations in nonreflexive Banach spaces and fractional calculus'
Agarwal, Ravi P. and Lupulescu, Vasile and O'Regan, Donal and ur Rahman, Ghaus (2015) 'Nonlinear fractional differential equations in nonreflexive Banach spaces and fractional calculus'. Adv. Difference Equ, [DOI] [Details] 

(2015)  'Recent trends in boundary value problems 2014 [Editorial]'
Ahmad, Bashir and Nieto, Juan J. and O'Regan, Donal and Zafer, Agacik (2015) 'Recent trends in boundary value problems 2014 [Editorial]'. Abstr. Appl. Anal, [DOI] [Details] 

(2015)  'On nonautonomous abstract nonlinear fractional differential equations'
Pierri, Michelle and O'Regan, Donal (2015) 'On nonautonomous abstract nonlinear fractional differential equations'. Appl. Anal, 94 (5):879890 [Details] 

(2014)  'SignChanging and Multiple Solutions of Impulsive Boundary Value Problems Via Critical Point Methods'
Tian, Y,Ge, WG,O'Regan, D (2014) 'SignChanging and Multiple Solutions of Impulsive Boundary Value Problems Via Critical Point Methods'. Journal Of Dynamical And Control Systems, 20 :559574 [DOI] [Details] 

(2014)  'Existence of positive solution for a sixthorder differential system with variable parameters'
Agarwal, Ravi P. and Kovacs, B. and O'Regan, D. (2014) 'Existence of positive solution for a sixthorder differential system with variable parameters'. J. Appl. Math. Comput, 44 (12):437454 [DOI] [Details] 

(2014)  'The long time behavior of a predatorprey model with disease in the prey by stochastic perturbation'
Zhang, Qiumei and Jiang, Daqing and Liu, Zhenwen and O'Regan, Donal (2014) 'The long time behavior of a predatorprey model with disease in the prey by stochastic perturbation'. Appl. Math. Comput, 245 :305320 [DOI] [Details] 

(2014)  'Positive solutions for a $n$thorder impulsive differential equation with integral boundary conditions'
Xu, Jiafa and O'Regan, Donal and Yang, Zhilin (2014) 'Positive solutions for a $n$thorder impulsive differential equation with integral boundary conditions'. Differ. Equ. Dyn. Syst, 22 (4):427439 [DOI] [Details] 

(2014)  '$p$th moment exponential stability of impulsive stochastic functional differential equations and application to control problems of NNs'
Li, Xiaodi and Zhu, Quanxin and O'Regan, Donal (2014) '$p$th moment exponential stability of impulsive stochastic functional differential equations and application to control problems of NNs'. J. Franklin Inst, 351 (9):44354456 [DOI] [Details] 

(2014)  'On the existence of integrable solutions for a nonlinear quadratic integral equation'
Bellour, Azzeddine and O'Regan, Donal and Taoudi, MohamedAziz (2014) 'On the existence of integrable solutions for a nonlinear quadratic integral equation'. J. Appl. Math. Comput, 46 (12):6777 [DOI] [Details] 

(2014)  'Some dynamic inequalities of Hardy type on time scales'
Saker, S. H. and O'Regan, Donal and Agarwal, R. P. (2014) 'Some dynamic inequalities of Hardy type on time scales'. Math. Inequal. Appl, 17 (3):11831199 [Details] 

(2014)  'Positive solutions for singular nonlocal boundary value problems involving nonlinear integral conditions'
Yan, Baoqiang and O'Regan, Donal and Agarwal, Ravi P. (2014) 'Positive solutions for singular nonlocal boundary value problems involving nonlinear integral conditions'. Differ. Equ. Appl, 6 (1):119 [Details] 

(2014)  'Higher order dynamic inequalities on time scales'
Saker, S. H. and Agarwal, R. P. and O'Regan, Donal (2014) 'Higher order dynamic inequalities on time scales'. Math. Inequal. Appl, 17 (2):461472 [Details] 

(2014)  'LPsolutions for fractional integral equations'
Arshad, S,Lupulescu, V,O'Regan, D (2014) 'LPsolutions for fractional integral equations'. Fractional Calculus And Applied Analysis, 17 :259276 [DOI] [Details] 

(2014)  'Stochastic Permanence, Stationary Distribution and Extinction of a SingleSpecies Nonlinear Diffusion System with Random Perturbation'
Zu, L,Jiang, DQ,O'Regan, D (2014) 'Stochastic Permanence, Stationary Distribution and Extinction of a SingleSpecies Nonlinear Diffusion System with Random Perturbation'. Abstract And Applied Analysis, [DOI] [Details] 

(2014)  'Fixedpoint theorems for nonlinear operators with singular perturbations and applications'
Yan, BQ,O'Regan, D,Agarwal, RP (2014) 'Fixedpoint theorems for nonlinear operators with singular perturbations and applications'. Journal Of Inequalities And Applications, [DOI] [Details] 

(2014)  'NONTRIVIAL SOLUTIONS FOR STURMLIOUVILLE SYSTEMS VIA A LOCAL MINIMUM THEOREM FOR FUNCTIONALS'
Bonanno, G,Heidarkhani, S,O'Regan, D (2014) 'NONTRIVIAL SOLUTIONS FOR STURMLIOUVILLE SYSTEMS VIA A LOCAL MINIMUM THEOREM FOR FUNCTIONALS'. Bulletin Of The Australian Mathematical Society, 89 :818 [DOI] [Details] 

(2014)  'Geodesic BPreinvex Functions and Multiobjective Optimization Problems on Riemannian Manifolds'
Chen, SL,Huang, NJ,O'Regan, D (2014) 'Geodesic BPreinvex Functions and Multiobjective Optimization Problems on Riemannian Manifolds'. Journal Of Applied Mathematics, [DOI] [Details] 

(2014)  'Generalized Hardy, Copson, Leindler and Bennett inequalities on time scales'
Saker, SH,O'Regan, D,Agarwal, R (2014) 'Generalized Hardy, Copson, Leindler and Bennett inequalities on time scales'. Mathematische Nachrichten, 287 :686698 [DOI] [Details] 

(2014)  'The dual variational method for nth order ODEs with multipoint boundary conditions'
Galewski, M,Nowakowski, A,O'Regan, D,Orpel, A (2014) 'The dual variational method for nth order ODEs with multipoint boundary conditions'. Applicable Analysis, 93 :957971 [DOI] [Details] 

(2014)  'OSCILLATORY AND ASYMPTOTIC BEHAVIOR OF SOLUTIONS FOR SECONDORDER NONLINEAR INTEGRODYNAMIC EQUATIONS ON TIME SCALES'
Agarwal, RP,Grace, SR,O'Regan, D,Zafer, A (2014) 'OSCILLATORY AND ASYMPTOTIC BEHAVIOR OF SOLUTIONS FOR SECONDORDER NONLINEAR INTEGRODYNAMIC EQUATIONS ON TIME SCALES'. Electronic Journal Of Differential Equations, [Details] 

(2014)  'OSCILLATORY AND ASYMPTOTIC BEHAVIOR OF SOLUTIONS FOR SECONDORDER NONLINEAR INTEGRODYNAMIC EQUATIONS ON TIME SCALES'
Agarwal, RP,Grace, SR,O'Regan, D,Zafer, A (2014) 'OSCILLATORY AND ASYMPTOTIC BEHAVIOR OF SOLUTIONS FOR SECONDORDER NONLINEAR INTEGRODYNAMIC EQUATIONS ON TIME SCALES'. Electronic Journal Of Differential Equations, [Details] 

(2014)  'ON THE EXISTENCE OF CONNECTED SETS OF SOLUTIONS FOR NONLINEAR OPERATORS'
O'Regan, D (2014) 'ON THE EXISTENCE OF CONNECTED SETS OF SOLUTIONS FOR NONLINEAR OPERATORS'. Fixed Point Theory, 15 :189198 [Details] 

(2014)  'Generalized LeraySchauder principles for general classes of maps in completely regular topological spaces'
O'Regan, D (2014) 'Generalized LeraySchauder principles for general classes of maps in completely regular topological spaces'. Applicable Analysis, 93 :16741690 [DOI] [Details] 

(2014)  'Floquet theory for a Volterra integrodynamic system'
Agarwal, RP,Lupulescu, V,O'Regan, D,Younus, A (2014) 'Floquet theory for a Volterra integrodynamic system'. Applicable Analysis, 93 :20022013 [DOI] [Details] 

(2014)  'Positive solutions for singular nonlocal boundary value problems'
Yan, BQ,O'Regan, D,Agarwal, RP (2014) 'Positive solutions for singular nonlocal boundary value problems'. Dynamical SystemsAn International Journal, 29 :301321 [DOI] [Details] 

(2014)  'TWO ORDER THEORETIC PROOFS FOR A FIXED POINT THEOREM IN PARTIALLY ORDERED METRIC SPACES AND ITS APPLICATION TO TRACE CLASS OPERATOR EQUATIONS'
Bazazi, F,Nourouzi, K,O'Regan, D (2014) 'TWO ORDER THEORETIC PROOFS FOR A FIXED POINT THEOREM IN PARTIALLY ORDERED METRIC SPACES AND ITS APPLICATION TO TRACE CLASS OPERATOR EQUATIONS'. Fixed Point Theory, 15 :393398 [Details] 

(2014)  'Existence of weak solutions for a fourthorder Navier boundary value problem'
Xu, JF,Dong, W,O'Regan, D (2014) 'Existence of weak solutions for a fourthorder Navier boundary value problem'. Applied Mathematics Letters, 37 :6166 [DOI] [Details] 

(2014)  'On CalphaHolder classical solutions for nonautonomous neutral differential equations: The nonlinear case'
Hernandez, E,O'Regan, D,Ponce, R (2014) 'On CalphaHolder classical solutions for nonautonomous neutral differential equations: The nonlinear case'. Journal Of Mathematical Analysis And Applications, 420 :18141831 [DOI] [Details] 

(2014)  'Multiplicity and uniqueness results for the singular nonlocal boundary value problem involving nonlinear integral conditions'
Yan, BQ,O'Regan, D,Agarwal, RP (2014) 'Multiplicity and uniqueness results for the singular nonlocal boundary value problem involving nonlinear integral conditions'. Boundary Value Problems, [DOI] [Details] 

(2014)  'Existence of positive solutions for a fourthorder differential system'
Agarwal, RP,Kovacs, B,O'Regan, D (2014) 'Existence of positive solutions for a fourthorder differential system'. Annales Polonici Mathematici, 112 :301312 [DOI] [Details] 

(2014)  'Nonautonomous impulsive systems with unbounded nonlinear terms'
Yuan, Xiaoqing and Xia, YongHui and O'Regan, Donal (2014) 'Nonautonomous impulsive systems with unbounded nonlinear terms'. Appl. Math. Comput, 245 :391403 [DOI] [Details] 

(2013)  'Existence results for abstract fractional differential equations with nonlocal conditions via resolvent operators'
Hernandez, E,O'Regan, D,Balachandran, K (2013) 'Existence results for abstract fractional differential equations with nonlocal conditions via resolvent operators'. Indagationes MathematicaeNew Series, 24 :6882 [DOI] [Details] 

(2013)  'μstability of infinite delay functional differential systems with impulsive effects'
Lin, Diwang and Li, Xiaodi and O'Regan, Donal (2013) 'μstability of infinite delay functional differential systems with impulsive effects'. Applicable Analysis, 92 (1):1526 [DOI] [Details] 

(2013)  'A uniqueness criterion for fractional differential equations with Caputo derivative'
Baleanu, D,Mustafa, OG,O'Regan, D (2013) 'A uniqueness criterion for fractional differential equations with Caputo derivative'. Nonlinear Dynamics, 71 :635640 [DOI] [Details] 

(2013)  'The theory of pseudolinear operators'
Bede, B,O'Regan, D (2013) 'The theory of pseudolinear operators'. KnowledgeBased Systems, 38 :1926 [DOI] [Details] 

(2013)  'Wellposedness for generalized quasivariational inclusion problems and for optimization problems with constraints'
Wang, SH,Huang, NJ,O'Regan, D (2013) 'Wellposedness for generalized quasivariational inclusion problems and for optimization problems with constraints'. Journal Of Global Optimization, 55 :189208 [DOI] [Details] 

(2013)  'HOMOTOPY PRINCIPLES FOR dESSENTIAL ACYCLIC MAPS'
O'Regan, D (2013) 'HOMOTOPY PRINCIPLES FOR dESSENTIAL ACYCLIC MAPS'. Journal Of Nonlinear And Convex Analysis, 14 :415422 [Details] 

(2013)  'Fixed points and exponential stability for a stochastic neutral cellular neural network'
Guo, CJ,O'Regan, D,Deng, FQ,Agarwal, RP (2013) 'Fixed points and exponential stability for a stochastic neutral cellular neural network'. Applied Mathematics Letters, 26 :849853 [DOI] [Details] 

(2013)  'An intersection theorem for setvalued mappings'
Agarwal, RP,Balaj, M,O'Regan, D (2013) 'An intersection theorem for setvalued mappings'. Applications Of Mathematics, 58 :269278 [DOI] [Details] 

(2013)  'SOLUTIONS AND MULTIPLE SOLUTIONS FOR SUPERLINEAR PERTURBATIONS OF THE PERIODIC SCALAR pLAPLACIAN'
Kyritsi, ST,O'Regan, D,Papageorgiou, NS (2013) 'SOLUTIONS AND MULTIPLE SOLUTIONS FOR SUPERLINEAR PERTURBATIONS OF THE PERIODIC SCALAR pLAPLACIAN'. Proceedings Of The Edinburgh Mathematical Society, 56 :805827 [DOI] [Details] 

(2013)  'The extinction and persistence of the stochastic SIS epidemic model with vaccination'
Zhao, YA,Jiang, DQ,O'Regan, D (2013) 'The extinction and persistence of the stochastic SIS epidemic model with vaccination'. Physica AStatistical Mechanics And Its Applications, 392 :49164927 [DOI] [Details] 

(2013)  'Positive solutions for a sixthorder boundary value problem with four parameters'
Agarwal, RP,Kovacs, B,O'Regan, D (2013) 'Positive solutions for a sixthorder boundary value problem with four parameters'. Boundary Value Problems, [DOI] [Details] 

(2013)  'ON A NEW CLASS OF ABSTRACT IMPULSIVE DIFFERENTIAL EQUATIONS'
Hernandez, E,O'Regan, D (2013) 'ON A NEW CLASS OF ABSTRACT IMPULSIVE DIFFERENTIAL EQUATIONS'. Proceedings Of The American Mathematical Society, 141 :16411649 [DOI] [Details] 

(2013)  'Almost periodic solutions for a Volterra model with mutual interference and Holling type III functional response'
Zhang, C,Huang, NJ,O'Regan, D (2013) 'Almost periodic solutions for a Volterra model with mutual interference and Holling type III functional response'. Applied Mathematics And Computation, 225 :503511 [DOI] [Details] 

(2013)  'Solutions for a fractional difference boundary value problem'
Dong, W,Xu, JF,O'Regan, D (2013) 'Solutions for a fractional difference boundary value problem'. Advances In Difference Equations, [DOI] [Details] 

(2013)  'STRICT STABILITY OF IMPULSIVE FUNCTIONAL DIFFERENTIAL EQUATIONS WITH INFINITE DELAYS'
Wang, L,Li, XD,O'Regan, D (2013) 'STRICT STABILITY OF IMPULSIVE FUNCTIONAL DIFFERENTIAL EQUATIONS WITH INFINITE DELAYS'. Dynamic Systems And Applications, 22 :171182 [Details] 

(2013)  'TOPOLOGICAL PRINCIPLES VIA A CONNECTEDNESS AND COMPACTNESS ARGUMENT'
O'Regan, D (2013) 'TOPOLOGICAL PRINCIPLES VIA A CONNECTEDNESS AND COMPACTNESS ARGUMENT'. Dynamic Systems And Applications, 22 :251267 [Details] 

(2013)  'BIFURCATION TYPE RESULTS FOR NONLINEAR EIGENVALUE NEUMANN PROBLEMS'
Filippakis, ME,O'Regan, D,Papageorgiou, NS (2013) 'BIFURCATION TYPE RESULTS FOR NONLINEAR EIGENVALUE NEUMANN PROBLEMS'. Dynamic Systems And Applications, 22 :285299 [Details] 

(2013)  'A DIMENSIONDEPENDING MULTIPLICITY RESULT FOR A PERTURBED SCHRODINGER EQUATION'
Kristaly, A,Morosanu, G,O'Regan, D (2013) 'A DIMENSIONDEPENDING MULTIPLICITY RESULT FOR A PERTURBED SCHRODINGER EQUATION'. Dynamic Systems And Applications, 22 :325335 [Details] 

(2013)  'ASYMPTOTICALLY PRACTICAL STABILITY OF IMPULSIVE FUNCTIONAL DIFFERENTIAL SYSTEMS IN TERMS OF TWO MEASUREMENTS'
Liu, CY,Li, XD,O'Regan, D (2013) 'ASYMPTOTICALLY PRACTICAL STABILITY OF IMPULSIVE FUNCTIONAL DIFFERENTIAL SYSTEMS IN TERMS OF TWO MEASUREMENTS'. Dynamic Systems And Applications, 22 :621640 [Details] 

(2013)  'Fractional boundary value problems with singularities in space variables'
O'Regan, D,Stanek, S (2013) 'Fractional boundary value problems with singularities in space variables'. Nonlinear Dynamics, 71 :641652 [DOI] [Details] 

(2013)  'EXISTENCE RESULTS FOR A CLASS OF ABSTRACT IMPULSIVE DIFFERENTIAL EQUATIONS'
Hernandez, E,O'Regan, D (2013) 'EXISTENCE RESULTS FOR A CLASS OF ABSTRACT IMPULSIVE DIFFERENTIAL EQUATIONS'. Bulletin Of The Australian Mathematical Society, 87 :366385 [DOI] [Details] 

(2013)  'Fixed point and variational methods for certain classes of boundaryvalue problems'
O'Regan, D,Orpel, A (2013) 'Fixed point and variational methods for certain classes of boundaryvalue problems'. Applicable Analysis, 92 :13931402 [DOI] [Details] 

(2013)  'A unified theory for homotopy principles for multimaps'
O'Regan, D (2013) 'A unified theory for homotopy principles for multimaps'. Applicable Analysis, 92 :19441958 [DOI] [Details] 

(2013)  'A New Gap Function for Vector Variational Inequalities with an Application'
Ma, HQ,Huang, NJ,Wu, M,O'Regan, D (2013) 'A New Gap Function for Vector Variational Inequalities with an Application'. Journal Of Applied Mathematics, [DOI] [Details] 

(2013)  'OSCILLATION OF SOLUTIONS TO SECONDORDER NONLINEAR DIFFERENTIAL EQUATIONS OF GENERALIZED EULER TYPE'
Aghajani, A,O'regan, D,Roomi, V (2013) 'OSCILLATION OF SOLUTIONS TO SECONDORDER NONLINEAR DIFFERENTIAL EQUATIONS OF GENERALIZED EULER TYPE'. Electronic Journal Of Differential Equations, [DOI] [Details] 

(2013)  'Properties of solutions of fourthorder differential equations with boundary conditions'
Saker, SH,Agarwal, RP,O'Regan, D (2013) 'Properties of solutions of fourthorder differential equations with boundary conditions'. Journal Of Inequalities And Applications, [DOI] [Details] 

(2013)  'CONTROLLABILITY OF IMPULSIVE FUNCTIONAL DIFFERENTIAL SYSTEMS WITH NONLOCAL CONDITIONS'
Liu, YS,O'Regan, D (2013) 'CONTROLLABILITY OF IMPULSIVE FUNCTIONAL DIFFERENTIAL SYSTEMS WITH NONLOCAL CONDITIONS'. Electronic Journal Of Differential Equations, [DOI] [Details] 

(2013)  'Comments on Some Recent Results on Controllability of Abstract Differential Problems'
Hernandez, E,O'Regan, D,Balachandran, K (2013) 'Comments on Some Recent Results on Controllability of Abstract Differential Problems'. Journal Of Optimization Theory And Applications, 159 :292295 [DOI] [Details] 

(2013)  'A Schauder fixed point theorem in semilinear spaces and applications'
Agarwal, RP,Arshad, S,O'Regan, D,Lupulescu, V (2013) 'A Schauder fixed point theorem in semilinear spaces and applications'. Fixed Point Theory And Applications, [DOI] [Details] 

(2013)  'Multiterm fractional differential equations in a nonreflexive Banach space'
Agarwal, RP,Lupulescu, V,O'Regan, D,ur Rahman, G (2013) 'Multiterm fractional differential equations in a nonreflexive Banach space'. Advances In Difference Equations, [DOI] [Details] 

(2013)  'Exponential stability for differential equations with random impulses at random times'
Agarwal, R,Hristova, S,O'Regan, D (2013) 'Exponential stability for differential equations with random impulses at random times'. Advances In Difference Equations, [DOI] [Details] 

(2013)  'Controllability of impulsive functional differential systems with nonlocal conditions'
Liu, Yansheng and O'Regan, Donal (2013) 'Controllability of impulsive functional differential systems with nonlocal conditions'. Electron. J. Differential Equations, [Details] 

(2013)  'On Well Posed Impulsive Boundary Value Problems for p(t)Laplacian's'
Galewski, M,O'Regan, D (2013) 'On Well Posed Impulsive Boundary Value Problems for p(t)Laplacian's'. Mathematical Modelling And Analysis, 18 :161175 [DOI] [Details] 

(2013)  'Existence of solutions for semilinear abstract differential equations with not instantaneous impulses'
Pierri, M,O'Regan, D,Rolnik, V (2013) 'Existence of solutions for semilinear abstract differential equations with not instantaneous impulses'. Applied Mathematics And Computation, 219 :67436749 [DOI] [Details] 

(2013)  'Existence of homoclinic orbits of a class of secondorder differential difference equations'
Guo, Chengjun and O'Regan, Donal and Xu, Yuantong and Agarwal, Ravi P. (2013) 'Existence of homoclinic orbits of a class of secondorder differential difference equations'. Dyn. Contin. Discrete Impuls. Syst. Ser. B Appl. Algorithms, 20 (6):675690 [Details] 

(2013)  'Multiple fixed points via essential and inessential multimaps'
O'Regan, Donal (2013) 'Multiple fixed points via essential and inessential multimaps'. Indian J. Math, 55 (2):149161 [Details] 

(2013)  'Asymptotic properties and simulations of a stochastic singlespecies dispersal model under regime switching'
Zu, Li and Jiang, Daqing and O'Regan, Donal (2013) 'Asymptotic properties and simulations of a stochastic singlespecies dispersal model under regime switching'. J. Appl. Math. Comput, 43 (12):387407 [DOI] [Details] 

(2013)  'Bifurcation type results for nonlinear eigenvalue Neumann problems'
Filippakis, M. E. and O'Regan, D. and Papageorgiou, N. S. (2013) 'Bifurcation type results for nonlinear eigenvalue Neumann problems'. Dynam. Systems Appl, 22 (23):285299 [Details] 

(2013)  'Periodic problems with the scalar $p$Laplacian resonant at any eigenvalue via critical point methods'
Kyritsi, Sophia Th. and O'Regan, Donal and Papageorgiou, Nikolaos S. (2013) 'Periodic problems with the scalar $p$Laplacian resonant at any eigenvalue via critical point methods'. Adv. Nonlinear Stud, 13 (3):751772 [Details] 

(2013)  'Homotopy principles for $d$essential acyclic maps'
O'Regan, Donal (2013) 'Homotopy principles for $d$essential acyclic maps'. J. Nonlinear Convex Anal, 14 (2):415422 [Details] 

(2013)  'On well posed impulsive boundary value problems for $p(t)$Laplacian's'
Galewski, Marek and O'Regan, Donal (2013) 'On well posed impulsive boundary value problems for $p(t)$Laplacian's'. Math. Model. Anal, 18 (2):161175 [Details] 

(2013)  'mustability of infinite delay functional differential systems with impulsive effects'
Lin, DW,Li, XD,O'Regan, D (2013) 'mustability of infinite delay functional differential systems with impulsive effects'. Applicable Analysis, 92 :1526 [DOI] [Details] 

(2012)  'Coincidence theory for multimaps'
O'Regan, D (2012) 'Coincidence theory for multimaps'. Applied Mathematics And Computation, 219 :20262034 [DOI] [Details] 

(2012)  'Structure of positive solution sets of sublinear semipositone operator equations'
Xu, X,O'Regan, D (2012) 'Structure of positive solution sets of sublinear semipositone operator equations'. Positivity, 16 :603618 [DOI] [Details] 

(2012)  'New gaps between zeros of fourthorder differential equations via Opial inequalities'
Saker, SH,Agarwal, RP,O'Regan, D (2012) 'New gaps between zeros of fourthorder differential equations via Opial inequalities'. Journal Of Inequalities And Applications, [DOI] [Details] 

(2012)  'Impulsive boundary value problems for p(t)Laplacian's via critical point theory'
Galewski, M,O'Regan, D (2012) 'Impulsive boundary value problems for p(t)Laplacian's via critical point theory'. Czechoslovak Mathematical Journal, 62 :951967 [DOI] [Details] 

(2012)  'Global structure of positive solution sets of nonlinear operator equations'
Xu, X,Sun, JX,O'Regan, D (2012) 'Global structure of positive solution sets of nonlinear operator equations'. Monatshefte Fur Mathematik, 165 :271303 [DOI] [Details] 

(2012)  'Multiple positive solutions to systems of nonlinear semipositone fractional differential equations with coupled boundary conditions'
Yuan, C,Jiang, D,O'Regan, D,Agarwal, RP (2012) 'Multiple positive solutions to systems of nonlinear semipositone fractional differential equations with coupled boundary conditions'. Electronic Journal Of Qualitative Theory Of Differential Equations, :117 [Details] 

(2012)  'Positive solutions of a focal problem for onedimensional pLaplacian equations'
Yang, ZL,O'Regan, D (2012) 'Positive solutions of a focal problem for onedimensional pLaplacian equations'. Mathematical And Computer Modelling, 55 :19421950 [DOI] [Details] 

(2012)  'Fuzzy fractional integral equations under compactness type condition'
Agarwal, RP,Arshad, S,O'Regan, D,Lupulescu, V (2012) 'Fuzzy fractional integral equations under compactness type condition'. Fractional Calculus And Applied Analysis, 15 :572590 [DOI] [Details] 

(2012)  'IMPULSIVE PERIODIC SOLUTIONS FOR SINGULAR PROBLEMS VIA VARIATIONAL METHODS'
Sung, JT,O'Regan, D (2012) 'IMPULSIVE PERIODIC SOLUTIONS FOR SINGULAR PROBLEMS VIA VARIATIONAL METHODS'. Bulletin Of The Australian Mathematical Society, 86 :193204 [DOI] [Details] 

(2012)  'Stability analysis of generalized impulsive functional differential equations'
Lin, DW,Li, XD,O'Regan, D (2012) 'Stability analysis of generalized impulsive functional differential equations'. Mathematical And Computer Modelling, 55 :16821690 [DOI] [Details] 

(2012)  'Positive solutions for mixed problems of singular fractional differential equations'
Agarwal, RP,O'Regan, D,Stanek, S (2012) 'Positive solutions for mixed problems of singular fractional differential equations'. Mathematische Nachrichten, 285 :2741 [DOI] [Details] 

(2012)  'FIXED POINT THEOREMS FOR CONVEXPOWER CONDENSING OPERATORS RELATIVE TO THE WEAK TOPOLOGY AND APPLICATIONS TO VOLTERRA INTEGRAL EQUATIONS'
Agarwal, RP,O'Regan, D,Taoudi, MA (2012) 'FIXED POINT THEOREMS FOR CONVEXPOWER CONDENSING OPERATORS RELATIVE TO THE WEAK TOPOLOGY AND APPLICATIONS TO VOLTERRA INTEGRAL EQUATIONS'. Journal Of Integral Equations And Applications, 24 :167181 [DOI] [Details] 

(2012)  'Positive solutions of twopoint boundary value problems for fractional singular differential equations'
Agarwal, RP,Liu, YS,O'Regan, D,Tian, CC (2012) 'Positive solutions of twopoint boundary value problems for fractional singular differential equations'. Differential Equations, 48 :619629 [DOI] [Details] 

(2012)  'Positive solutions of some elliptic differential equations with oscillating nonlinearity'
Jarad, F,Mustafa, OG,O'Regan, D (2012) 'Positive solutions of some elliptic differential equations with oscillating nonlinearity'. Complex Variables And Elliptic Equations, 57 :599609 [DOI] [Details] 

(2012)  'Multiplicity results for a class of fourth order semipositone mpoint boundary value problems'
Liu, YS,O'Regan, D (2012) 'Multiplicity results for a class of fourth order semipositone mpoint boundary value problems'. Applicable Analysis, 91 :911921 [DOI] [Details] 

(2012)  'EXISTENCE AND GENERALIZED QUASILINEARIZATION METHODS FOR SINGULAR NONLINEAR DIFFERENTIAL EQUATIONS'
ElGebeily, M,O'regan, D (2012) 'EXISTENCE AND GENERALIZED QUASILINEARIZATION METHODS FOR SINGULAR NONLINEAR DIFFERENTIAL EQUATIONS'. Dynamic Systems And Applications, 21 :6781 [Details] 

(2012)  'A variational approach to the eigenvalue problem for higher order BVPs with singular nonlinearities'
O'Regan, D,Orpel, A (2012) 'A variational approach to the eigenvalue problem for higher order BVPs with singular nonlinearities'. Applied Mathematics And Computation, 218 :1006310071 [DOI] [Details] 

(2012)  'New oscillation criteria for secondorder neutral dynamic equations on time scales via Riccati substitution'
Saker, SH,O'Regan, D (2012) 'New oscillation criteria for secondorder neutral dynamic equations on time scales via Riccati substitution'. Hiroshima Mathematical Journal, 42 :7798 [Details] 

(2012)  'NEUMANN PROBLEMS WITH DOUBLE RESONANCE'
O'Regan, D,Papageorgiou, NS,Smyrlis, G (2012) 'NEUMANN PROBLEMS WITH DOUBLE RESONANCE'. Topological Methods In Nonlinear Analysis, 39 :151173 [Details] 

(2012)  'Viscosity approximation methods for pseudocontractive semigroups in Banach spaces'
Li, XS,Huang, NJ,O'Regan, D (2012) 'Viscosity approximation methods for pseudocontractive semigroups in Banach spaces'. Nonlinear AnalysisTheory Methods & Applications, 75 :37763786 [DOI] [Details] 

(2012)  'Positive properties of Green's function for threepoint boundary value problems of nonlinear fractional differential equations and its applications'
Xu, XJ,Jiang, DQ,Hu, WN,O'Regan, D,Agarwal, RP (2012) 'Positive properties of Green's function for threepoint boundary value problems of nonlinear fractional differential equations and its applications'. Applicable Analysis, 91 :323343 [DOI] [Details] 

(2012)  'Stochastically asymptotically stability of the multigroup SEIR and SIR models with random perturbation'
Yuan, CJ,Jiang, DQ,O'Regan, D,Agarwal, RP (2012) 'Stochastically asymptotically stability of the multigroup SEIR and SIR models with random perturbation'. Communications In Nonlinear Science And Numerical Simulation, 17 :25012516 [DOI] [Details] 

(2012)  'Analysis of autonomous LotkaVolterra competition systems with random perturbation'
Jiang, DQ,Ji, CY,Li, XY,O'Regan, D (2012) 'Analysis of autonomous LotkaVolterra competition systems with random perturbation'. Journal Of Mathematical Analysis And Applications, 390 :582595 [DOI] [Details] 

(2012)  'Approximations of ternary Jordan homomorphisms and derivations in multiC (au) ternary algebras'
O'Regan, D,Rassias, JM,Saadati, R (2012) 'Approximations of ternary Jordan homomorphisms and derivations in multiC (au) ternary algebras'. Acta Mathematica Hungarica, 134 :99114 [DOI] [Details] 

(2012)  'Krasnosel'skii Type Fixed Point Theorems for Mappings on Nonconvex Sets'
Alghamdi, MA,O'Regan, D,Shahzad, N (2012) 'Krasnosel'skii Type Fixed Point Theorems for Mappings on Nonconvex Sets'. Abstract And Applied Analysis, [DOI] [Details] 

(2012)  'On a new class of abstract integral equations and applications'
Hernandez, E,O'Regan, D,Bena, MA (2012) 'On a new class of abstract integral equations and applications'. Applied Mathematics And Computation, 219 :22712277 [DOI] [Details] 

(2012)  'Gaps between zeros of secondorder halflinear differential equations'
Saker, SH,Agarwal, RP,O'Regan, D (2012) 'Gaps between zeros of secondorder halflinear differential equations'. Applied Mathematics And Computation, 219 :875885 [DOI] [Details] 

(2012)  'A Unifying Approach to Variational Relation Problems'
Agarwal, RP,Balaj, M,O'Regan, D (2012) 'A Unifying Approach to Variational Relation Problems'. Journal Of Optimization Theory And Applications, 155 :417429 [DOI] [Details] 

(2012)  'Existence of Solutions for Abstract NonAutonomous Neutral Differential Equations'
Hernandez, E,O'Regan, D (2012) 'Existence of Solutions for Abstract NonAutonomous Neutral Differential Equations'. Canadian Mathematical BulletinBulletin Canadien De Mathematiques, 55 :736751 [DOI] [Details] 

(2012)  'Positive solutions for a secondorder pLaplacian impulsive boundary value problem'
Ding, YZ,O'Regan, D (2012) 'Positive solutions for a secondorder pLaplacian impulsive boundary value problem'. Advances In Difference Equations, [DOI] [Details] 

(2012)  'On a fractional differential equation with infinitely many solutions'
Baleanu, D,Mustafa, OG,O'Regan, D (2012) 'On a fractional differential equation with infinitely many solutions'. Advances In Difference Equations, [DOI] [Details] 

(2012)  'A NOTE ON CONTINUATION PRINCIPLES FOR COINCIDENCES'
O'Regan, D (2012) 'A NOTE ON CONTINUATION PRINCIPLES FOR COINCIDENCES'. Dynamic Systems And Applications, 21 :645655 [Details] 

(2012)  'The structure of fixedpoint sets of Lipschitzian type semigroups'
Sahu, DR,Agarwal, RP,O'Regan, D (2012) 'The structure of fixedpoint sets of Lipschitzian type semigroups'. Fixed Point Theory And Applications, [DOI] [Details] 

(2012)  'A nonlinear alternative for maps with continuous selections'
O'Regan, Donal (2012) 'A nonlinear alternative for maps with continuous selections'. Commun. Appl. Anal, 16 (2):175177 [Details] 

(2012)  'Dynamics of fuzzy impulsive bidirectional associative memory neural networks with timevarying delays'
Rakkiyappan, R. and Li, Xiaodi and O'Regan, Donal (2012) 'Dynamics of fuzzy impulsive bidirectional associative memory neural networks with timevarying delays'. J. Appl. Math. Comput, 40 (12):289317 [DOI] [Details] 

(2012)  'Existence of solutions for abstract nonautonomous neutral differential equations'
Hern\'andez, Eduardo and O'Regan, Donal (2012) 'Existence of solutions for abstract nonautonomous neutral differential equations'. Canad. Math. Bull, 55 (4):736751 [DOI] [Details] 

(2012)  'A unifying approach to variational relation problems'
Agarwal, R. P. and Balaj, M. and O'Regan, D. (2012) 'A unifying approach to variational relation problems'. J. Optim. Theory Appl, 155 (2):417429 [DOI] [Details] 

(2012)  'Impulsive periodic solutions for singular problems via variational methods'
Sun, Juntao and O'Regan, Donal (2012) 'Impulsive periodic solutions for singular problems via variational methods'. Bull. Aust. Math. Soc, 86 (2):193204 [DOI] [Details] 

(2012)  'Fixed point theorems for convexpower condensing operators relative to the weak topology and applications to Volterra integral equations'
Agarwal, Ravi P. and O'Regan, Donal and Taoudi, MohamedAziz (2012) 'Fixed point theorems for convexpower condensing operators relative to the weak topology and applications to Volterra integral equations'. J. Integral Equations Appl, 24 (2):167181 [DOI] [Details] 

(2012)  'A Morse theoretic approach to the existence of multiple solutions for nonlinear periodic problems'
Kyritsi, Sophia Th. and O'Regan, Donal and Papageorgiou, Nikolaos S. (2012) 'A Morse theoretic approach to the existence of multiple solutions for nonlinear periodic problems'. Dyn. Contin. Discrete Impuls. Syst. Ser. A Math. Anal, 19 (3):295322 [Details] 

(2012)  'On the oscillation of fourth order nonlinear dynamic equations'
Grace, Said R. and Agarwal, Ravi P. and O'Regan, Donal (2012) 'On the oscillation of fourth order nonlinear dynamic equations'. J. Adv. Math. Stud, 5 (1):110 [Details] 

(2012)  'Fixed point theorems for some operator equations and inclusions in Banach spaces relative to the weak topology'
Djebali, Sma\"\il and O'Regan, Donal and Sahnoun, Zahira (2012) 'Fixed point theorems for some operator equations and inclusions in Banach spaces relative to the weak topology'. Commun. Appl. Anal, 16 (1):110 [Details] 

(2012)  'Antiperiodic solutions for semilinear evolution equations in Banach spaces'
Chen, Yuqing and O'Regan, Donal and Agarwal, Ravi P. (2012) 'Antiperiodic solutions for semilinear evolution equations in Banach spaces'. J. Appl. Math. Comput, 38 (12):6370 [DOI] [Details] 

(2012)  'Variational methods and critical point theory'
OteroEspinar, M. Victoria and Nieto, Juan J. and O'Regan, Donal and Perera, Kanishka (2012) 'Variational methods and critical point theory'. Abstr. Appl. Anal, [Details] 

(2012)  'Krasnosel\cprime skii type fixed point theorems for mappings on nonconvex sets'
Alghamdi, Maryam A. and O'Regan, Donal and Shahzad, Naseer (2012) 'Krasnosel\cprime skii type fixed point theorems for mappings on nonconvex sets'. Abstr. Appl. Anal, [Details] 

(2012)  'Fixed point theory for multivalued weakly convexpower condensing mappings with application to integral inclusions'
Agarwal, Ravi P. and O'Regan, Donal and Taoudi, MohamedAziz (2012) 'Fixed point theory for multivalued weakly convexpower condensing mappings with application to integral inclusions'. Mem. Differential Equations Math. Phys, 57 :1740 [Details] 

(2011)  'CalphaHOLDER CLASSICAL SOLUTIONS FOR NONAUTONOMOUS NEUTRAL DIFFERENTIAL EQUATIONS'
Hernandez, E,O'Regan, D (2011) 'CalphaHOLDER CLASSICAL SOLUTIONS FOR NONAUTONOMOUS NEUTRAL DIFFERENTIAL EQUATIONS'. Discrete And Continuous Dynamical Systems, 29 :241260 [DOI] [Details] 

(2011)  'Antiperiodic solutions for evolution equations associated with maximal monotone mappings'
Chen, YQ,Nieto, JJ,O'Regan, D (2011) 'Antiperiodic solutions for evolution equations associated with maximal monotone mappings'. Applied Mathematics Letters, 24 :302307 [DOI] [Details] 

(2011)  'On a new class of abstract neutral differential equations'
Hernandez, E,O'Regan, D (2011) 'On a new class of abstract neutral differential equations'. Journal Of Functional Analysis, 261 :34573481 [DOI] [Details] 

(2011)  'A multiplicity theorem for psuperlinear pLaplacian equations using critical groups and morse theory'
Kyritsi, ST,O'Regan, D,Papageorgiou, NS (2011) 'A multiplicity theorem for psuperlinear pLaplacian equations using critical groups and morse theory'. Monatshefte Fur Mathematik, 163 :471491 [DOI] [Details] 

(2011)  'On the Nagumo uniqueness theorem'
Mustafa, OG,O'Regan, D (2011) 'On the Nagumo uniqueness theorem'. Nonlinear AnalysisTheory Methods & Applications, 74 :63836386 [DOI] [Details] 

(2011)  'POSITIVE SOLUTIONS FOR A 2nORDER BOUNDARY VALUE PROBLEM INVOLVING ALL DERIVATIVES OF ODD ORDERS'
Yang, ZL,O'Regan, D (2011) 'POSITIVE SOLUTIONS FOR A 2nORDER BOUNDARY VALUE PROBLEM INVOLVING ALL DERIVATIVES OF ODD ORDERS'. Topological Methods In Nonlinear Analysis, 37 :87101 [Details] 

(2011)  'MULTIPLE SOLUTIONS FOR A CLASS OF DIRICHLET QUASILINEAR ELLIPTIC SYSTEMS DRIVEN BY A (P, Q)LAPLACIAN OPERATOR'
Bonanno, G,Heidarkhani, S,O'regan, D (2011) 'MULTIPLE SOLUTIONS FOR A CLASS OF DIRICHLET QUASILINEAR ELLIPTIC SYSTEMS DRIVEN BY A (P, Q)LAPLACIAN OPERATOR'. Dynamic Systems And Applications, 20 :8999 [Details] 

(2011)  'Nontrivial solutions for nonlinear fourthorder elastic beam equations'
Bonanno, G,Di Bella, B,O'Regan, D (2011) 'Nontrivial solutions for nonlinear fourthorder elastic beam equations'. Computers & Mathematics With Applications, 62 :18621869 [DOI] [Details] 

(2011)  'Eigenvalue intervals for higher order problems with singular nonlinearities'
O'Regan, D,Orpel, A (2011) 'Eigenvalue intervals for higher order problems with singular nonlinearities'. Applied Mathematics And Computation, 218 :12331239 [DOI] [Details] 

(2011)  'A UNIFIED TREATMENT USING CRITICAL POINT METHODS OF THE EXISTENCE OF MULTIPLE SOLUTIONS FOR SUPERLINEAR AND SUBLINEAR NEUMANN PROBLEMS'
Motreanu, D,O'Regan, D,Papageorgiou, NS (2011) 'A UNIFIED TREATMENT USING CRITICAL POINT METHODS OF THE EXISTENCE OF MULTIPLE SOLUTIONS FOR SUPERLINEAR AND SUBLINEAR NEUMANN PROBLEMS'. Communications On Pure And Applied Analysis, 10 :17911816 [DOI] [Details] 

(2011)  'A Nagumolike uniqueness theorem for fractional differential equations'
Baleanu, D,Mustafa, OG,O'Regan, D (2011) 'A Nagumolike uniqueness theorem for fractional differential equations'. Journal Of Physics AMathematical And Theoretical, 44 [DOI] [Details] 

(2011)  'Stability of some setvalued functional equations'
Park, C,O'Regan, D,Saadati, R (2011) 'Stability of some setvalued functional equations'. Applied Mathematics Letters, 24 :19101914 [DOI] [Details] 

(2011)  'Fixed point theorems for singlevalued and multivalued generalized contractions in metric spaces endowed with a graph'
Nicolae, A,O'Regan, D,Petrusel, A (2011) 'Fixed point theorems for singlevalued and multivalued generalized contractions in metric spaces endowed with a graph'. Georgian Mathematical Journal, 18 :307327 [DOI] [Details] 

(2011)  'EXISTENCE AND ASYMPTOTIC STABILITY OF SOLUTIONS OF A PERTURBED FRACTIONAL FUNCTIONALINTEGRAL EQUATION WITH LINEAR MODIFICATION OF THE ARGUMENT'
Darwish, MA,Henderson, J,O'Regan, D (2011) 'EXISTENCE AND ASYMPTOTIC STABILITY OF SOLUTIONS OF A PERTURBED FRACTIONAL FUNCTIONALINTEGRAL EQUATION WITH LINEAR MODIFICATION OF THE ARGUMENT'. Bulletin Of The Korean Mathematical Society, 48 :539553 [DOI] [Details] 

(2011)  'Multiplicity results for Hammerstein integral equations via critical point theory'
O'Regan, D (2011) 'Multiplicity results for Hammerstein integral equations via critical point theory'. Applicable Analysis, 90 :11511157 [DOI] [Details] 

(2011)  'Existence of subharmonic solutions and homoclinic orbits for a class of even higher order differential equations'
Guo, CJ,O'Regan, D,Xu, YT,Agarwal, RP (2011) 'Existence of subharmonic solutions and homoclinic orbits for a class of even higher order differential equations'. Applicable Analysis, 90 :11691183 [DOI] [Details] 

(2011)  'PHILOS TYPE CRITERIA FOR SECONDORDER HALFLINEAR DYNAMIC EQUATIONS'
Grace, SR,Agarwal, RP,Bohner, M,O'Regan, D (2011) 'PHILOS TYPE CRITERIA FOR SECONDORDER HALFLINEAR DYNAMIC EQUATIONS'. Mathematical Inequalities & Applications, 14 :211222 [Details] 

(2011)  'Characterization of selfadjoint ordinary differential operators'
ElGebeily, MA,O'Regan, D,Agarwal, R (2011) 'Characterization of selfadjoint ordinary differential operators'. Mathematical And Computer Modelling, 54 :659672 [DOI] [Details] 

(2011)  'Fixed points for better admissible multifunctions on proximity spaces'
O'Regan, D,Peran, J (2011) 'Fixed points for better admissible multifunctions on proximity spaces'. Journal Of Mathematical Analysis And Applications, 380 :882887 [DOI] [Details] 

(2011)  'EIGENVALUE PROBLEMS FOR SINGULAR ODES'
O'Regan, D,Orpel, A (2011) 'EIGENVALUE PROBLEMS FOR SINGULAR ODES'. Glasgow Mathematical Journal, 53 :301312 [DOI] [Details] 

(2011)  'EXISTENCE OF THREE SOLUTIONS FOR A KIRCHHOFFTYPE BOUNDARYVALUE PROBLEM'
Heidarkhani, S,Afrouzi, GA,O'Regan, D (2011) 'EXISTENCE OF THREE SOLUTIONS FOR A KIRCHHOFFTYPE BOUNDARYVALUE PROBLEM'. Electronic Journal Of Differential Equations, [DOI] [Details] 

(2011)  'SOME DYNAMIC WIRTINGERTYPE INEQUALITIES AND THEIR APPLICATIONS'
Agarwal, RP,Bohner, M,O'Regan, D,Saker, SH (2011) 'SOME DYNAMIC WIRTINGERTYPE INEQUALITIES AND THEIR APPLICATIONS'. Pacific Journal Of Mathematics, 252 :118 [Details] 

(2011)  'EXISTENCE OF SOLUTIONS FOR ABSTRACT NEUTRAL INTEGRODIFFERENTIAL EQUATIONS WITH UNBOUNDED DELAY'
Hernandez, EM,O'Regan, D (2011) 'EXISTENCE OF SOLUTIONS FOR ABSTRACT NEUTRAL INTEGRODIFFERENTIAL EQUATIONS WITH UNBOUNDED DELAY'. Czechoslovak Mathematical Journal, 61 :691706 [Details] 

(2011)  'MEASURES OF NONCOMPACTNESS AND ASYMPTOTIC STABILITY OF SOLUTIONS OF A QUADRATIC HAMMERSTEIN INTEGRAL EQUATION'
Banas, J,O'Regan, D,Agarwal, RP (2011) 'MEASURES OF NONCOMPACTNESS AND ASYMPTOTIC STABILITY OF SOLUTIONS OF A QUADRATIC HAMMERSTEIN INTEGRAL EQUATION'. Rocky Mountain Journal Of Mathematics, 41 :17691792 [DOI] [Details] 

(2011)  'EXISTENCE OF MULTIPLE PERIODIC SOLUTIONS FOR A CLASS OF FIRSTORDER NEUTRAL DIFFERENTIAL EQUATIONS'
Guo, CJ,O'Regan, D,Agarwal, RP (2011) 'EXISTENCE OF MULTIPLE PERIODIC SOLUTIONS FOR A CLASS OF FIRSTORDER NEUTRAL DIFFERENTIAL EQUATIONS'. Applicable Analysis And Discrete Mathematics, 5 :147158 [DOI] [Details] 

(2011)  'EXISTENCE OF THREE SOLUTIONS FOR A DOUBLY EIGENVALUE FOURTHORDER BOUNDARY VALUE PROBLEM'
Afrouzi, GA,Heidarkhani, S,O'Regan, D (2011) 'EXISTENCE OF THREE SOLUTIONS FOR A DOUBLY EIGENVALUE FOURTHORDER BOUNDARY VALUE PROBLEM'. Taiwanese Journal Of Mathematics, 15 :201210 [Details] 

(2011)  'New oscillation criteria for secondorder neutral functional dynamic equations via the generalized Riccati substitution'
Saker, SH,O'Regan, D (2011) 'New oscillation criteria for secondorder neutral functional dynamic equations via the generalized Riccati substitution'. Communications In Nonlinear Science And Numerical Simulation, 16 :423434 [DOI] [Details] 

(2011)  'On some vector fcomplementarity problems'
Agarwal, RP,AminiHarandi, A,Farajzadeh, AP,O'Regan, D (2011) 'On some vector fcomplementarity problems'. Georgian Mathematical Journal, 18 :597614 [DOI] [Details] 

(2011)  'EXISTENCE OF SOLUTIONS OF SYSTEMS OF VOLTERRA INTEGRAL EQUATIONS VIA BREZISBROWDER ARGUMENTS'
Agarwal, RP,O'Regan, D,Wong, PJY (2011) 'EXISTENCE OF SOLUTIONS OF SYSTEMS OF VOLTERRA INTEGRAL EQUATIONS VIA BREZISBROWDER ARGUMENTS'. Electronic Journal Of Differential Equations, [DOI] [Details] 

(2011)  'FIXED POINT THEOREMS FOR CONDENSING MULTIVALUED MAPPINGS UNDER WEAK TOPOLOGY FEATURES'
Agarwal, RP,O'Regan, D,Taoudi, MA (2011) 'FIXED POINT THEOREMS FOR CONDENSING MULTIVALUED MAPPINGS UNDER WEAK TOPOLOGY FEATURES'. Fixed Point Theory, 12 :247254 [Details] 

(2011)  'A NOTE ON A STOCHASTIC PERTURBED DI SIR EPIDEMIC MODEL'
Yang, QS,Ji, CY,Jiang, DQ,O'Regan, D,Agarwal, RP (2011) 'A NOTE ON A STOCHASTIC PERTURBED DI SIR EPIDEMIC MODEL'. Dynamic Systems And Applications, 20 :183192 [Details] 

(2011)  'TOPOLOGICAL PRINCIPLES FOR ESSENTIAL TYPE MAPS'
O'Regan, D (2011) 'TOPOLOGICAL PRINCIPLES FOR ESSENTIAL TYPE MAPS'. Dynamic Systems And Applications, 20 :541550 [Details] 

(2011)  'Some nonlinear contraction theorems in $\scr L$fuzzy spaces'
O'Regan, Donal and Saadati, Reza (2011) 'Some nonlinear contraction theorems in $\scr L$fuzzy spaces'. Dyn. Contin. Discrete Impuls. Syst. Ser. A Math. Anal, 18 (3):319339 [Details] 

(2011)  'Degree theory for the sum of VMO maps and maximal monotone maps'
Chen, Yuqing and O'Regan, Donal and Agarwal, Ravi P. (2011) 'Degree theory for the sum of VMO maps and maximal monotone maps'. Cubo, 13 (2):119126 [Details] 

(2011)  'Oscillation criteria via inequalities for second order dynamic inclusions'
Grace, Said R. and Agarwal, Ravi P. and O'Regan, Donal (2011) 'Oscillation criteria via inequalities for second order dynamic inclusions'. J. Indian Math. Soc. (N.S.), 78 (14):4552 [Details] 

(2011)  'Fixed point theorems for condensing multivalued mappings under weak topology features'
Agarwal, Ravi P. and O'Regan, Donal and Taoudi, MohamedAziz (2011) 'Fixed point theorems for condensing multivalued mappings under weak topology features'. Fixed Point Theory, 12 (2):247254 [Details] 

(2011)  'Nonlinear Hammerstein integral equations via local linking and mountain pass'
O'Regan, Donal (2011) 'Nonlinear Hammerstein integral equations via local linking and mountain pass'. Rend. Circ. Mat. Palermo (2), 60 (3):357364 [DOI] [Details] 

(2011)  'A note on fixed point theory for extension type maps'
O'Regan, Donal (2011) 'A note on fixed point theory for extension type maps'. Nonlinear Stud, 18 (4):587593 [Details] 

(2011)  'Fixed point theorems for general classes of maps acting on topological vector spaces'
Agarwal, Ravi P. and O'Regan, Donal and Taoudi, MohamedAziz (2011) 'Fixed point theorems for general classes of maps acting on topological vector spaces'. AsianEur. J. Math, 4 (3):373387 [DOI] [Details] 

(2011)  'Variational relation problems in locally convex spaces'
Agarwal, Ravi P. and Balaj, Mircea and O'Regan, Donal (2011) 'Variational relation problems in locally convex spaces'. Dyn. Contin. Discrete Impuls. Syst. Ser. A Math. Anal, 18 (4):501512 [Details] 

(2011)  'Lefschetz fixed point theory for permissible compact absorbing type contractions'
O'Regan, Donal (2011) 'Lefschetz fixed point theory for permissible compact absorbing type contractions'. Dyn. Contin. Discrete Impuls. Syst. Ser. A Math. Anal, 18 (3):285296 [Details] 

(2011)  'Eigenvalue intervals for higher order problems with singular nonlinearities'
O'Regan, Donal and Orpel, Aleksandra (2011) 'Eigenvalue intervals for higher order problems with singular nonlinearities'. Appl. Math. Comput, 218 (4):12331239 [DOI] [Details] 

(2011)  'On the solvability of some operator equations and inclusions in Banach spaces with the weak topology'
Djebali, Sma\"\il and O'Regan, Donal and Sahnoun, Zahira (2011) 'On the solvability of some operator equations and inclusions in Banach spaces with the weak topology'. Commun. Appl. Anal, 15 (1):125140 [Details] 

(2011)  'Solvability of a quadratic Hammerstein integral equation in the class of functions having limits at infinity'
Agarwal, Ravi P. and Bana\'s (2011) 'Solvability of a quadratic Hammerstein integral equation in the class of functions having limits at infinity'. J. Integral Equations Appl, 23 (2):157181 [DOI] [Details] 

(2011)  'Structure of the fixed point set of asymptotically nonexpansive mappings in Banach spaces with weak uniformly normal structure'
Sahu, D. R. and Agarwal, R. P. and O'Regan, Donal (2011) 'Structure of the fixed point set of asymptotically nonexpansive mappings in Banach spaces with weak uniformly normal structure'. J. Appl. Anal, 17 (1):5168 [DOI] [Details] 

(2011)  'A unified treatment using critical point methods of the existence of multiple solutions for superlinear and sublinear Neumann problems'
Motreanu, Dumitru and O'Regan, Donal and Papageorgiou, Nikolaos S. (2011) 'A unified treatment using critical point methods of the existence of multiple solutions for superlinear and sublinear Neumann problems'. Commun. Pure Appl. Anal, 10 (6):17911816 [DOI] [Details] 

(2011)  'Nonexistence and existence of positive solutions for second order singular threepoint boundary value problems with derivative dependent and signchanging nonlinearities'
Ji, Caisheng and O'Regan, Donal and Yan, Baoqiang and Agarwal, Ravi P. (2011) 'Nonexistence and existence of positive solutions for second order singular threepoint boundary value problems with derivative dependent and signchanging nonlinearities'. J. Appl. Math. Comput, 36 (12):6187 [DOI] [Details] 

(2011)  'Eigenvalue problems for singular ODEs'
O'Regan, Donal and Orpel, Aleksandra (2011) 'Eigenvalue problems for singular ODEs'. Glasg. Math. J, 53 (2):301312 [DOI] [Details] 

(2011)  'CαHölder classical solutions for nonautonomous neutral differential equations'
Hern\'andez, Eduardo and O'Regan, Donal (2011) 'CαHölder classical solutions for nonautonomous neutral differential equations'. Discrete And Continuous Dynamical SystemsSer. A, 29 (1):241260 [DOI] [Details] 

(2011)  'Some common fixed point theorems for weakly commuting maps in Lfuzzy metric spaces'
Saadati, R. (2011) 'Some common fixed point theorems for weakly commuting maps in Lfuzzy metric spaces'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser A: Mathematical Analysis), 18 :113 [Details] 

(2011)  'Integer valued fixed point index for compact acyclic maps'
O'REGAN, D. (2011) 'Integer valued fixed point index for compact acyclic maps'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser A: Mathematical Analysis), 18 :149159 [Details] 

(2011)  'Existence of three solutions for a doubly eigenvalue fourth order boundary value problem'
Afrouzi, G.A., Heidarkhani, S. (2011) 'Existence of three solutions for a doubly eigenvalue fourth order boundary value problem'. Taiwanese Journal of Mathematics, 15 :201210 [Details] 

(2011)  'Existence of multiple periodic solutions for a class of first order neutral differential equations'
Guo, C., Agarwal, R.P. (2011) 'Existence of multiple periodic solutions for a class of first order neutral differential equations'. Applicable Analysis and Discrete Mathematics, 5 :147158 [DOI] [Details] 

(2011)  'FIXED POINT THEORY IN GENERALIZED APPROXIMATE NEIGHBORHOOD EXTENSION SPACES'
O'Regan, D (2011) 'FIXED POINT THEORY IN GENERALIZED APPROXIMATE NEIGHBORHOOD EXTENSION SPACES'. Fixed Point Theory, 12 :155164 [Details] 

(2011)  'New oscillation criteria for second order neutral functional dynamic equations via the generalized Riccati substitution'
Saker, S.H. (2011) 'New oscillation criteria for second order neutral functional dynamic equations via the generalized Riccati substitution'. Communications in Nonlinear Sciences and Numerical Simulations, 16 :423434 [DOI] [Details] 

(2011)  'Degenerate Anisotropic Differential Operators and Applications'
Agarwal, R,O'Regan, D,Shakhmurov, V (2011) 'Degenerate Anisotropic Differential Operators and Applications'. Boundary Value Problems, [DOI] [Details] 

(2011)  'Multiplicity results using bifurcation techniques for a class of boundary value problems of impulsive differential equations'
Liu, YS,O'Regan, D (2011) 'Multiplicity results using bifurcation techniques for a class of boundary value problems of impulsive differential equations'. Communications In Nonlinear Science And Numerical Simulation, 16 :17691775 [DOI] [Details] 

(2011)  'Applications of linking to Hammerstein integral equations'
O'Regan, D (2011) 'Applications of linking to Hammerstein integral equations'. Applied Mathematics And Computation, 217 :52795284 [DOI] [Details] 

(2011)  'Bifurcation techniques for fourth order mpoint boundary value problems'
Liu, Y. (2011) 'Bifurcation techniques for fourth order mpoint boundary value problems'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser A: Mathematical Analysis), 18 :215234 [Details] 

(2011)  'Positive solutions for a 2nthorder boundary value problem involving all derivatives of odd orders'
Yang, Z. (2011) 'Positive solutions for a 2nthorder boundary value problem involving all derivatives of odd orders'. Topological Methods in Nonlinear Analysis, 37 :87101 [Details] 

(2011)  'Existence results for impulsive functional differential inclusions'
Gorniewicz, L., Ntouyas, S.K. (2011) 'Existence results for impulsive functional differential inclusions'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser A: Mathematical Analysis), 18 :115134 [Details] 

(2011)  'Existence results of BrezisBrowder type for systems of Fredholm integral equations'
Agarwal, RP,O'Regan, D,Wong, PJY (2011) 'Existence results of BrezisBrowder type for systems of Fredholm integral equations'. Advances In Difference Equations, :135 [DOI] [Details] 

(2010)  'A monotone iterative technique for stationary and time dependent problems in Banach spaces'
ElGebeily, MA,O'Regan, D,Nieto, JJ (2010) 'A monotone iterative technique for stationary and time dependent problems in Banach spaces'. Journal Of Computational And Applied Mathematics, 233 :23952404 [DOI] [Details] 

(2010)  'Type I operators and the approximation of singular twopoint boundary value problems'
ElGebeily, M., Messaoudi, S. (2010) 'Type I operators and the approximation of singular twopoint boundary value problems'. Applied Mathematics and Computation, 216 :34333438 [Details] 

(2010)  'Homoclinic orbits for a singular secondorder neutral differential equation'
Guo, CJ,O'Regan, D,Xu, YT,Agarwal, RP (2010) 'Homoclinic orbits for a singular secondorder neutral differential equation'. Journal Of Mathematical Analysis And Applications, 366 :550560 [DOI] [Details] 

(2010)  'ON A PERTURBED CONSERVATIVE SYSTEM OF SEMILINEAR WAVE EQUATIONS WITH PERIODICDIRICHLET BOUNDARY CONDITIONS'
Chen, JH,O'Regan, D (2010) 'ON A PERTURBED CONSERVATIVE SYSTEM OF SEMILINEAR WAVE EQUATIONS WITH PERIODICDIRICHLET BOUNDARY CONDITIONS'. Bulletin Of The Australian Mathematical Society, 81 :281288 [DOI] [Details] 

(2010)  'One dimensional phiLaplacian functional equations'
O'Regan, D,Peran, J (2010) 'One dimensional phiLaplacian functional equations'. Journal Of Mathematical Analysis And Applications, 371 :177183 [DOI] [Details] 

(2010)  'Fixed Point Theorems for wsCompact Mappings in Banach Spaces'
Agarwal, RP,O'Regan, D,Taoudi, MA (2010) 'Fixed Point Theorems for wsCompact Mappings in Banach Spaces'. Fixed Point Theory And Applications, [DOI] [Details] 

(2010)  'Constantsign solutions for singular systems of Fredholm integral equations'
Agarwal, RP,O'Regan, D,Wong, PJY (2010) 'Constantsign solutions for singular systems of Fredholm integral equations'. Mathematical Methods In The Applied Sciences, 33 :17831793 [DOI] [Details] 

(2010)  'BrowderKrasnoselskiiType Fixed Point Theorems in Banach Spaces'
Agarwal, RP,O'Regan, D,Taoudi, MA (2010) 'BrowderKrasnoselskiiType Fixed Point Theorems in Banach Spaces'. Fixed Point Theory And Applications, [DOI] [Details] 

(2010)  'Periodic constantsign solutions for systems of Hill’s equations'
Wong, P.J.Y., Agarwal, R.P. (2010) 'Periodic constantsign solutions for systems of Hill’s equations'. Asymptotic Analysis, 67 :191216 [DOI] [Details] 

(2010)  'FARKASTYPE RESULTS FOR GENERAL COMPOSED CONVEX OPTIMIZATION PROBLEMS WITH INEQUALITY CONSTRAINTS'
Long, XJ,Huang, NJ,O'Regan, D (2010) 'FARKASTYPE RESULTS FOR GENERAL COMPOSED CONVEX OPTIMIZATION PROBLEMS WITH INEQUALITY CONSTRAINTS'. Mathematical Inequalities & Applications, 13 :135143 [Details] 

(2010)  'Fixed Point Theorems for SetValued Contraction Type Maps in Metric Spaces'
AminiHarandi, A,O'Regan, D (2010) 'Fixed Point Theorems for SetValued Contraction Type Maps in Metric Spaces'. Fixed Point Theory And Applications, [DOI] [Details] 

(2010)  'Fixed point theorems for the sum of two nonlinear operators in locally convex spaces'
Taoudi, M.A. (2010) 'Fixed point theorems for the sum of two nonlinear operators in locally convex spaces'. Indian Journal of Mathematics, 52 :1324 [Details] 

(2010)  'Fixed point theory for compact absorbing contractions in extension type spaces'
O'REGAN, D. (2010) 'Fixed point theory for compact absorbing contractions in extension type spaces'. CUBO, A Mathematical Journal, 12 (2):199215 [Details] 

(2010)  'A generalized quasiequilibrium problem'
Balaj, M. (2010) 'A generalized quasiequilibrium problem'. Optim. Appl, 35 :201211 [Details] 

(2010)  'One dimensional _x001E_Laplacian funticonal equations'
Peranl, J. (2010) 'One dimensional _x001E_Laplacian funticonal equations'. Journal of Mathematica Analysis and Applications, 371 :177183 [DOI] [Details] 

(2010)  'Infinitely many solutions for a class of elliptic variationalhemivariational inequality problems'
D'Agui, G. (2010) 'Infinitely many solutions for a class of elliptic variationalhemivariational inequality problems'. Studia Universitatis BabesBolyai Mathematica, 55 (4):7382 [Details] 

(2010)  'HOMOTOPY EXTENSION TYPE MAPS AND FIXED POINTS'
O'Regan, D (2010) 'HOMOTOPY EXTENSION TYPE MAPS AND FIXED POINTS'. Dynamic Systems And Applications, 19 :375381 [Details] 

(2010)  'Strong vector equilibrium problems in topological vector spaces via KKM maps (with'
Farajzadeh, A.P., AminiHarandi, A., Agarwal, R.P. (2010) 'Strong vector equilibrium problems in topological vector spaces via KKM maps (with'. CUBO, A Mathematical Journal, 12 :219230 [Details] 

(2010)  'Essential extension type maps for general classes of maps'
O'Regan, D (2010) 'Essential extension type maps for general classes of maps'. Applied Mathematics And Computation, 216 :33913395 [DOI] [Details] 

(2010)  'On recent developments in the theory of abstract differential equations with fractional derivatives'
Hernandez, E,O'Regan, D,Balachandran, K (2010) 'On recent developments in the theory of abstract differential equations with fractional derivatives'. Nonlinear AnalysisTheory Methods & Applications, 73 :34623471 [DOI] [Details] 

(2010)  'Existence of Multiple Solutions for Nonlinear Dirichlet Problems with a Nonhomogeneous Differential Operator'
Kyritsi, ST,O'Regan, D,Papageorgiou, NS (2010) 'Existence of Multiple Solutions for Nonlinear Dirichlet Problems with a Nonhomogeneous Differential Operator'. Advanced Nonlinear Studies, 10 :631657 [Details] 

(2010)  'Bounds for analytic solutions to integral equations in the complex domain'
Agarwal, RP,O'Regan, D,Pinelas, S (2010) 'Bounds for analytic solutions to integral equations in the complex domain'. Applied Mathematics Letters, 23 :847851 [DOI] [Details] 

(2010)  'POSITIVE SOLUTIONS AND BIFURCATION PHENOMENA FOR NONLINEAR ELLIPTIC EQUATIONS OF LOGISTIC TYPE: THE SUPERDIFFUSIVE CASE'
Filippakis, ME,O'Regan, D,Papageorgiou, NS (2010) 'POSITIVE SOLUTIONS AND BIFURCATION PHENOMENA FOR NONLINEAR ELLIPTIC EQUATIONS OF LOGISTIC TYPE: THE SUPERDIFFUSIVE CASE'. Communications On Pure And Applied Analysis, 9 :15071527 [DOI] [Details] 

(2010)  'Infinitely many weak solutions for a class of quasilinear elliptic systems'
Bonanno, G,Bisci, GM,O'Regan, D (2010) 'Infinitely many weak solutions for a class of quasilinear elliptic systems'. Mathematical And Computer Modelling, 52 :152160 [DOI] [Details] 

(2010)  'Antiperiodic solutions for evolution equations associated with monotone type mappings'
Chen, YQ,O'Regan, D,Agarwal, RP (2010) 'Antiperiodic solutions for evolution equations associated with monotone type mappings'. Applied Mathematics Letters, 23 :13201325 [DOI] [Details] 

(2010)  'Fixed point theorems for the sum of two weakly sequentially continuous mappings'
O'Regan, D,Taoudi, MA (2010) 'Fixed point theorems for the sum of two weakly sequentially continuous mappings'. Nonlinear AnalysisTheory Methods & Applications, 73 :283289 [DOI] [Details] 

(2010)  'Differential mixed variational inequalities in finite dimensional spaces'
Li, XS,Huang, NJ,O'Regan, D (2010) 'Differential mixed variational inequalities in finite dimensional spaces'. Nonlinear AnalysisTheory Methods & Applications, 72 :38753886 [DOI] [Details] 

(2010)  'Constant sign solutions for singular systems of Fredholm integral equations'
Agarwal, R.P., Wong, P.J.Y. (2010) 'Constant sign solutions for singular systems of Fredholm integral equations'. Mathematical Methods in the Applied Sciences, 33 :17831793 [Details] 

(2010)  'Uniform separable differential operators with parameters'
Agarwal, RP,O'Regan, D,Shakhmurov, VB (2010) 'Uniform separable differential operators with parameters'. Journal Of The Franklin InstituteEngineering And Applied Mathematics, 347 :216 [DOI] [Details] 

(2010)  'Positive Solutions of Singular Complementary Lidstone Boundary Value Problems'
Agarwal, RP,O'Regan, D,Stanek, S (2010) 'Positive Solutions of Singular Complementary Lidstone Boundary Value Problems'. Boundary Value Problems, [DOI] [Details] 

(2010)  'Positive solutions for Dirichlet problems, of singular nonlinear fractional differential equations'
Agarwal, RP,O'Regan, D,Stanek, S (2010) 'Positive solutions for Dirichlet problems, of singular nonlinear fractional differential equations'. Journal Of Mathematical Analysis And Applications, 371 :5768 [DOI] [Details] 

(2010)  'NONTRIVIAL SOLUTIONS OF pSUPERLINEAR ANISOTROPIC pLAPLACIAN SYSTEMS VIA MORSE THEORY'
Perera, K,Agarwal, RP,O'Regan, D (2010) 'NONTRIVIAL SOLUTIONS OF pSUPERLINEAR ANISOTROPIC pLAPLACIAN SYSTEMS VIA MORSE THEORY'. Topological Methods In Nonlinear Analysis, 35 :367378 [Details] 

(2010)  'INCLUSION AND INTERSECTION THEOREMS WITH APPLICATIONS IN EQUILIBRIUM THEORY IN GCONVEX SPACES'
Balaj, M,O'Regan, D (2010) 'INCLUSION AND INTERSECTION THEOREMS WITH APPLICATIONS IN EQUILIBRIUM THEORY IN GCONVEX SPACES'. Journal Of The Korean Mathematical Society, 47 :10171029 [DOI] [Details] 

(2010)  'Existence results for second order boundary value problems using the barrier strip technique'
Kelevedjiev, PS,O'Regan, D,Popivanov, N,Agarwal, RP (2010) 'Existence results for second order boundary value problems using the barrier strip technique'. Aequationes Mathematicae, 79 :281291 [DOI] [Details] 

(2010)  'Existence of periodic solutions for a class of secondorder neutral differential equations with multiple deviating arguments'
Guo, C., Agarwal, R.P. (2010) 'Existence of periodic solutions for a class of secondorder neutral differential equations with multiple deviating arguments'. CUBO, A Mathematical Journal, 12 (3):153165 [Details] 

(2010)  'Existence of homoclinic solutions for a class of second order differential equations with multiple lags'
Guo, C., Agarwal, R.P. (2010) 'Existence of homoclinic solutions for a class of second order differential equations with multiple lags'. Advances in Dynamical Systems and Applications, 5 :7585 [Details] 

(2010)  'A generalized quasiequilibrium problem'
Balaj, M. (2010) 'A generalized quasiequilibrium problem'. Nonlinear Analysis and Variational Problems, [Details] 

(2010)  'Structure of positive solution sets of semipositone singular boundary value problems'
Xu, X,O'Regan, D,Chen, YF (2010) 'Structure of positive solution sets of semipositone singular boundary value problems'. Nonlinear AnalysisTheory Methods & Applications, 72 :35353550 [DOI] [Details] 

(2010)  'SINGULAR INTEGRAL EQUATIONS AND APPLICATIONS TO NONLINEAR CONJUGATE PROBLEMS'
Chu, JF,O'Regan, D (2010) 'SINGULAR INTEGRAL EQUATIONS AND APPLICATIONS TO NONLINEAR CONJUGATE PROBLEMS'. Taiwanese Journal Of Mathematics, 14 :329345 [Details] 

(2010)  'MULTIPLICITY RESULTS FOR pSUBLINEAR pLAPLACIAN PROBLEMS INVOLVING INDEFINITE EIGENVALUE PROBLEMS VIA MORSE THEORY'
Perera, K,Agarwal, RP,O'Regan, D (2010) 'MULTIPLICITY RESULTS FOR pSUBLINEAR pLAPLACIAN PROBLEMS INVOLVING INDEFINITE EIGENVALUE PROBLEMS VIA MORSE THEORY'. Electronic Journal Of Differential Equations, [DOI] [Details] 

(2010)  'Lrandom and fuzzy normed spaces and classical theory'
Saadati, R. (2010) 'Lrandom and fuzzy normed spaces and classical theory'. CUBO, A Mathematical Journal, 12 (3):7181 [Details] 

(2010)  'FIXED POINT THEORY FOR VARIOUS CLASSES OF INWARD MULTIVALUED MAPS'
Agarwal, RP,O'Regan, D (2010) 'FIXED POINT THEORY FOR VARIOUS CLASSES OF INWARD MULTIVALUED MAPS'. Bulletin Of The Australian Mathematical Society, 81 :115 [DOI] [Details] 

(2010)  'Periodic points for compact absorbing contractions in extension type spaces'
O'REGAN, D. (2010) 'Periodic points for compact absorbing contractions in extension type spaces'. Communications in Applied Analysis, 14 :111 [Details] 

(2010)  'Lefschetz fixed point theorems in generalized neighborhood extension spaces with respect to a map'
O'REGAN, D. (2010) 'Lefschetz fixed point theorems in generalized neighborhood extension spaces with respect to a map'. Rend. del Circolo Matematico di Palermo, 59 :319330 [Details] 

(2010)  'FIXED POINTS FOR COMPACT PERMISSIBLE MAPS IN EXTENSION TYPE SPACES'
O'Regan, D (2010) 'FIXED POINTS FOR COMPACT PERMISSIBLE MAPS IN EXTENSION TYPE SPACES'. Fixed Point Theory, 11 :107112 [Details] 

(2010)  'Strong convergence theorems for relatively nonexpansive mappings in Banach spaces with applications'
Li, X,Huang, NJ,O'Regan, D (2010) 'Strong convergence theorems for relatively nonexpansive mappings in Banach spaces with applications'. Computers & Mathematics With Applications, 60 :13221331 [DOI] [Details] 

(2010)  'THE BOUNDARY CONDITIONS DESCRIPTION OF TYPE I DOMAINS'
ElGebeily, M,O'Regan, D (2010) 'THE BOUNDARY CONDITIONS DESCRIPTION OF TYPE I DOMAINS'. Glasgow Mathematical Journal, 52 :619633 [DOI] [Details] 

(2010)  'Three solutions to a class of Neumann double eigenvalue elliptic systems driven by a (p1, ...., pn)Laplacian'
Afrouzi, G.A., Heidarkhani, S. (2010) 'Three solutions to a class of Neumann double eigenvalue elliptic systems driven by a (p1, ...., pn)Laplacian'. Bulletin Korean Math. Society, 47 :12351250 [DOI] [Details] 

(2010)  'THREE SOLUTIONS TO A CLASS OF NEUMANN DOUBLY EIGENVALUE ELLIPTIC SYSTEMS DRIVEN BY A (p(1), ... , p(n))LAPLACIAN'
Afrouzi, GA,Heidarkhani, S,O'Regan, D (2010) 'THREE SOLUTIONS TO A CLASS OF NEUMANN DOUBLY EIGENVALUE ELLIPTIC SYSTEMS DRIVEN BY A (p(1), ... , p(n))LAPLACIAN'. Bulletin Of The Korean Mathematical Society, 47 :12351250 [DOI] [Details] 

(2009)  'Dynamic inequalities and equations of Volterra type'
Agarwal, R.P., Jankowski, T. (2009) 'Dynamic inequalities and equations of Volterra type'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser A: Mathematical Analysis), 16 :471480 [Details] 

(2009)  'Constant sign solutions for systems of singular integral equations of Hammerstein type'
Agarwal, R.P., Wong, P.J.Y. (2009) 'Constant sign solutions for systems of singular integral equations of Hammerstein type'. Mathematical and Computer Modelling, 50 :9991025 [DOI] [Details] 

(2009)  'COMMON FIXED POINT THEOREMS FOR FOUR MAPPINGS DEFINED ON LFUZZY METRIC SPACES WITH NONLINEAR CONTRACTIVE TYPE CONDITION'
Jesic, SN,Babacev, NA,O'regan, D,Nikolic, RM (2009) 'COMMON FIXED POINT THEOREMS FOR FOUR MAPPINGS DEFINED ON LFUZZY METRIC SPACES WITH NONLINEAR CONTRACTIVE TYPE CONDITION'. Fixed Point Theory, 10 :259274 [Details] 

(2009)  'Barrier strips and positive solutions of first order singular and regular initial value problems'
Agarwal, RP,Kelevedjiev, PS,O'Regan, D (2009) 'Barrier strips and positive solutions of first order singular and regular initial value problems'. Differential Equations, 45 :14081413 [DOI] [Details] 

(2009)  'A note on the degree for maximal monotone mappings in finite dimensional spaces'
Chen, YQ,O'Regan, D,Wang, FL,Agarwal, RP (2009) 'A note on the degree for maximal monotone mappings in finite dimensional spaces'. Applied Mathematics Letters, 22 :17661769 [DOI] [Details] 

(2009)  'Existence for set differential equations via multivalued operator equations'
Agarwal, R.P. (2009) 'Existence for set differential equations via multivalued operator equations'. Mathematics, Game Theory and Algebra Compendium, 2 :541545 [Details] 

(2009)  'Controllability of VolterraFredholm type systems in Banach spaces'
Hernandez, E,O'Regan, D (2009) 'Controllability of VolterraFredholm type systems in Banach spaces'. Journal Of The Franklin InstituteEngineering And Applied Mathematics, 346 :95101 [DOI] [Details] 

(2009)  'Continuation theorems for acyclic maps in topological spaces'
O'REGAN, D. (2009) 'Continuation theorems for acyclic maps in topological spaces'. Communications in Applied Analysis, 13 :3946 [Details] 

(2009)  'On generalizations of Ekeland’s variational principle and Takahashi’s minimization'
AminiHarandi, A., Farajzadeh, A.P. (2009) 'On generalizations of Ekeland’s variational principle and Takahashi’s minimization'. Functional Analysis and Applications, 14 :653664 [Details] 

(2009)  'New types of generalized variationallike inequality problems in topological vector spaces'
Farajzadeh, A.P., AminiHarandi, A., Agarwal, R.P. (2009) 'New types of generalized variationallike inequality problems in topological vector spaces'. Applied Mathematics Letters, 22 :11261129 [Details] 

(2009)  'Necessay and sufficient conditions for common fixed point theorems in fuzzy metric spaces'
Abbas, M. (2009) 'Necessay and sufficient conditions for common fixed point theorems in fuzzy metric spaces'. Demostratio Mathematica, 42 :887900 [Details] 

(2009)  'INDEX AND FIXED POINT THEORY FOR COMPACT ABSORBING CONTRACTIVE PERMISSIBLE MAPS'
O'Regan, D (2009) 'INDEX AND FIXED POINT THEORY FOR COMPACT ABSORBING CONTRACTIVE PERMISSIBLE MAPS'. Journal Of Nonlinear And Convex Analysis, 10 :369381 [Details] 

(2009)  'Degree theory for monotone type mappings in nonreflexive Banach spaces'
Wang, FL,Chen, YQ,O'Regan, D (2009) 'Degree theory for monotone type mappings in nonreflexive Banach spaces'. Applied Mathematics Letters, 22 :276279 [DOI] [Details] 

(2009)  'SOLUTIONS OF A SYSTEM OF INTEGRAL EQUATIONS IN ORLICZ SPACES'
Agarwal, RP,O'regan, D,Wong, PJY (2009) 'SOLUTIONS OF A SYSTEM OF INTEGRAL EQUATIONS IN ORLICZ SPACES'. Journal Of Integral Equations And Applications, 21 :469498 [DOI] [Details] 

(2009)  'Positive solutions for singular second order Neumann boundary value problems via a cone fixed point theorem'
Sun, Y,Cho, YJ,O'Regan, D (2009) 'Positive solutions for singular second order Neumann boundary value problems via a cone fixed point theorem'. Applied Mathematics And Computation, 210 :8086 [DOI] [Details] 

(2009)  'Lefschetz fixed point theory for compact absorbing contractive admissible maps'
Cho, Y.J., Yan, B. (2009) 'Lefschetz fixed point theory for compact absorbing contractive admissible maps'. J. Korean Soc. Math. Educ. Ser. B Pure Appl. Math, 16 :6983 [Details] 

(2009)  'Iterative approximation problem of fixed points for asymptotically pseudocontractive mappings'
Liang, J., Luo, S.B. (2009) 'Iterative approximation problem of fixed points for asymptotically pseudocontractive mappings'. Indian Journal of Mathematics, 51 :255265 [Details] 

(2009)  'Fixed point theory for various classes of permissible maps via index theory'
Agarwal, R.P. (2009) 'Fixed point theory for various classes of permissible maps via index theory'. Comm. Korean Mathematical Society, 24 :247263 [Details] 

(2009)  'Fixed point theory for permissible extension type maps'
O'REGAN, D. (2009) 'Fixed point theory for permissible extension type maps'. Rend. del Circolo Matematico di Palermo, 58 :477484 [Details] 

(2009)  'Weak singularities and existence of solutions to (k, n  k) conjugate boundary value problems'
Zu, L,Jiang, DQ,Gai, YJ,O'Regan, D,Gao, HY (2009) 'Weak singularities and existence of solutions to (k, n  k) conjugate boundary value problems'. Nonlinear AnalysisReal World Applications, 10 :26272632 [DOI] [Details] 

(2009)  'SOLVABILITY ANALYSIS OF PERIODIC SOLUTIONS FOR nTH ORDER DIFFERENTIAL EQUATIONS'
Chen, JH,O'regan, D (2009) 'SOLVABILITY ANALYSIS OF PERIODIC SOLUTIONS FOR nTH ORDER DIFFERENTIAL EQUATIONS'. Dynamic Systems And Applications, 18 :205211 [Details] 

(2009)  'SOME REMARKS ON CONTROLLABILITY OF EVOLUTION EQUATIONS IN BANACH SPACES'
Ntouyas, SK,O'Regan, D (2009) 'SOME REMARKS ON CONTROLLABILITY OF EVOLUTION EQUATIONS IN BANACH SPACES'. Electronic Journal Of Differential Equations, [DOI] [Details] 

(2009)  'The existence of two nontrivial solutions via homological local linking for the noncoercive pLaplacian Neumann problem'
O'Regan, D,Papageorgiou, NS (2009) 'The existence of two nontrivial solutions via homological local linking for the noncoercive pLaplacian Neumann problem'. Nonlinear AnalysisTheory Methods & Applications, 70 :43864392 [DOI] [Details] 

(2009)  'THREE FUNCTIONALS FIXED POINT THEOREM'
Avery, R,Henderson, J,O'Regan, D (2009) 'THREE FUNCTIONALS FIXED POINT THEOREM'. Arabian Journal For Science And Engineering, 34 :2537 [Details] 

(2009)  'A CHARACTERIZATION OF SELFADJOINT OPERATORS DETERMINED BY THE WEAK FORMULATION OF SECONDORDER SINGULAR DIFFERENTIAL EXPRESSIONS'
ElGebeily, M,O'Regan, D (2009) 'A CHARACTERIZATION OF SELFADJOINT OPERATORS DETERMINED BY THE WEAK FORMULATION OF SECONDORDER SINGULAR DIFFERENTIAL EXPRESSIONS'. Glasgow Mathematical Journal, 51 :385404 [DOI] [Details] 

(2009)  'Multiplicity Results Using Bifurcation Techniques for a Class of FourthOrder mPoint Boundary Value Problems'
Liu, YS,O'Regan, D (2009) 'Multiplicity Results Using Bifurcation Techniques for a Class of FourthOrder mPoint Boundary Value Problems'. Boundary Value Problems, [DOI] [Details] 

(2009)  'New kinds of generalized variationallike inequality problems in topological vector spaces'
Farajzadeh, AP,AminiHarandi, A,O'Regan, D,Agarwal, RP (2009) 'New kinds of generalized variationallike inequality problems in topological vector spaces'. Applied Mathematics Letters, 22 :11261129 [DOI] [Details] 

(2009)  'The finite elementGalerkin method for singular selfadjoint differential equations'
ElGebeily, MA,Furati, KM,O'Regan, D (2009) 'The finite elementGalerkin method for singular selfadjoint differential equations'. Journal Of Computational And Applied Mathematics, 223 :735752 [DOI] [Details] 

(2009)  'On the approximation of nonlinear singular selfadjoint second order boundary value problems'
ElGebeily, MA,Furati, KM,O'Regan, D,Agarwal, R (2009) 'On the approximation of nonlinear singular selfadjoint second order boundary value problems'. Journal Of Computational And Applied Mathematics, 224 :360372 [DOI] [Details] 

(2009)  'MULTIPLE POSITIVE SOLUTIONS OF SINGULAR DIRICHLET SECONDORDER BOUNDARYVALUE PROBLEMS WITH DERIVATIVE DEPENDENCE'
Agarwal, RP,O'Regan, D,Yan, BQ (2009) 'MULTIPLE POSITIVE SOLUTIONS OF SINGULAR DIRICHLET SECONDORDER BOUNDARYVALUE PROBLEMS WITH DERIVATIVE DEPENDENCE'. Journal Of Dynamical And Control Systems, 15 :126 [DOI] [Details] 

(2009)  'A selection of oscillation criteria for secondorder differential inclusions'
Grace, SR,Agarwal, RP,O'Regan, D (2009) 'A selection of oscillation criteria for secondorder differential inclusions'. Applied Mathematics Letters, 22 :153158 [DOI] [Details] 

(2009)  'Global behaviour of the components of nodal solutions for Lidstone boundary value problems'
Li, HT,Liu, YS,O'Regan, D (2009) 'Global behaviour of the components of nodal solutions for Lidstone boundary value problems'. Applicable Analysis, 88 :11731182 [DOI] [Details] 

(2009)  'Constantsign solutions for systems of singular integral equations of Hammerstein type'
Agarwal, RP,O'Regan, D,Wong, PJY (2009) 'Constantsign solutions for systems of singular integral equations of Hammerstein type'. Mathematical And Computer Modelling, 50 :9991025 [DOI] [Details] 

(2009)  'Positive and maximal positive solutions of singular mixed boundary value problem'
Agarwal, RP,O'Regan, D,Stanek, S (2009) 'Positive and maximal positive solutions of singular mixed boundary value problem'. Central European Journal Of Mathematics, 7 :694716 [DOI] [Details] 

(2009)  'Oscillation of secondorder strongly superlinear and strongly sublinear dynamic equations'
Grace, SR,Agarwal, RP,Bohner, M,O'Regan, D (2009) 'Oscillation of secondorder strongly superlinear and strongly sublinear dynamic equations'. Communications In Nonlinear Science And Numerical Simulation, 14 :34633471 [DOI] [Details] 

(2009)  'Existence and location results for signchanging solutions for threepoint boundary value problems using LeraySchauder degree'
Xu, X,O'Regan, D,Zhang, RF (2009) 'Existence and location results for signchanging solutions for threepoint boundary value problems using LeraySchauder degree'. Monatshefte Fur Mathematik, 158 :413439 [DOI] [Details] 

(2009)  'Existence and quasilinearization in Banach spaces'
ElGebeily, MA,Al Shammari, K,O'Regan, D (2009) 'Existence and quasilinearization in Banach spaces'. Journal Of Mathematical Analysis And Applications, 358 :345354 [DOI] [Details] 

(2009)  'On the homotopy property of topological degree for maximal monotone mappings'
Chen, YQ,O'Regan, D (2009) 'On the homotopy property of topological degree for maximal monotone mappings'. Applied Mathematics And Computation, 208 :373377 [DOI] [Details] 

(2009)  'Multiplicity results for sublinear and superlinear Hammerstein integral equations via Morse theory'
O'REGAN, D. (2009) 'Multiplicity results for sublinear and superlinear Hammerstein integral equations via Morse theory'. Communications in Applied Analysis, (Special issue on Variational and Critical Point Methods in Nonlinear Analysis), 13 :385394 [Details] 

(2009)  'Multiplicity results using bifurcation techniques for a class of fourth order mpoint boundary value problems'
Liu, Y. (2009) 'Multiplicity results using bifurcation techniques for a class of fourth order mpoint boundary value problems'. Boundary Value Problems, (Special issue on Singular Boundary Value Problems for Ordinary Differential Equations), 970135 [Details] 

(2009)  'Multiple Solutions for Resonant Hemivariational Inequalities via Minimax Methods'
Kyritsi, ST,Regan, DO,Papageorgiou, NS (2009) 'Multiple Solutions for Resonant Hemivariational Inequalities via Minimax Methods'. Advanced Nonlinear Studies, 9 :453477 [Details] 

(2009)  'Multiple solutions for noncoercive resonant Neumann hemivariational inequalities'
Filippakis, M.E., Papageorgiou, N.S. (2009) 'Multiple solutions for noncoercive resonant Neumann hemivariational inequalities'. Communications in Applied Analysis (Special issue on Variational and Critical Point Methods in Nonlinear Analysis), 13 [Details] 

(2009)  'Positive solutions of a secondorder boundary value problem via integrodifferential equation arguments'
Yang, ZL,O'Regan, D,Agarwal, RP (2009) 'Positive solutions of a secondorder boundary value problem via integrodifferential equation arguments'. Applicable Analysis, 88 :11971211 [DOI] [Details] 

(2009)  'RANDOM COINCIDENCE POINTS AND RANDOM FIXED POINTS OF MULTIFUNCTIONS IN METRIC SPACES'
Ge, CS,Liang, J,O'Regan, D,Xiao, TJ (2009) 'RANDOM COINCIDENCE POINTS AND RANDOM FIXED POINTS OF MULTIFUNCTIONS IN METRIC SPACES'. Taiwanese Journal Of Mathematics, 13 :899912 [Details] 

(2009)  'Generalized degree for classes of finite dimensional upper hemicontinuous mappings in separable Banach spaces'
Wang, FL,Chen, YQ,O'Regan, D (2009) 'Generalized degree for classes of finite dimensional upper hemicontinuous mappings in separable Banach spaces'. Applied Mathematics And Computation, 211 :173176 [DOI] [Details] 

(2009)  'Higher order nonlinear degenerate differential operator equations'
Agarwal, RP,O'Regan, D,Shakhmurov, V (2009) 'Higher order nonlinear degenerate differential operator equations'. Applied Mathematics Letters, 22 :15561561 [DOI] [Details] 

(2009)  'Antiperiodic Boundary Value Problems for Finite Dimensional Differential Systems'
Chen, YQ,O'Regan, D,Wang, FL,Zhou, SL (2009) 'Antiperiodic Boundary Value Problems for Finite Dimensional Differential Systems'. Boundary Value Problems, [DOI] [Details] 

(2009)  'Asymptotic Lefschetz fixed point theory for ANES(compact) maps'
O'REGAN, D. (2009) 'Asymptotic Lefschetz fixed point theory for ANES(compact) maps'. Rendiconti del Circolo Matematico di Palermo, 58 :8797 [Details] 

(2009)  'LeraySchauder and Krasnoselskii fixed point theory in Fr´echet spaces for Urysohn type operators'
O'REGAN, D. (2009) 'LeraySchauder and Krasnoselskii fixed point theory in Fr´echet spaces for Urysohn type operators'. Advances in Nonlinear Analysis: Theory Methods and Applications, :149163 [Details] 

(2009)  'Fixed point theorems for condensing multimaps on abstract convex uniform spaces'
AminiHarandi, A., Farajzadeh, A.P., Agarwal, R.P. (2009) 'Fixed point theorems for condensing multimaps on abstract convex uniform spaces'. Nonlinear Functional Analysis and Applications, 14 :109120 [Details] 

(2009)  'FIXED POINT INDEX FOR COMPOSITE TYPE MAPS'
O'Regan, D (2009) 'FIXED POINT INDEX FOR COMPOSITE TYPE MAPS'. Applicable Analysis And Discrete Mathematics, 3 :224235 [DOI] [Details] 

(2009)  'Constant Sign and Nodal Solutions for Problems with the pLaplacian and a Nonsmooth Potential Using Variational Techniques'
Agarwal, RP,Filippakis, ME,O'Regan, D,Papageorgiou, NS (2009) 'Constant Sign and Nodal Solutions for Problems with the pLaplacian and a Nonsmooth Potential Using Variational Techniques'. Boundary Value Problems, [DOI] [Details] 

(2009)  'BSeparable boundary value problems in Banachvalued function spaces'
Agarwal, RP,O'Regan, D,Shakhmurov, VB (2009) 'BSeparable boundary value problems in Banachvalued function spaces'. Applied Mathematics And Computation, 210 :4863 [DOI] [Details] 

(2009)  'ON SOLUTIONS OF A QUADRATIC HAMMERSTEIN INTEGRAL EQUATION ON AN UNBOUNDED INTERVAL'
Banas, J,O'regan, D,Sadarangani, K (2009) 'ON SOLUTIONS OF A QUADRATIC HAMMERSTEIN INTEGRAL EQUATION ON AN UNBOUNDED INTERVAL'. Dynamic Systems And Applications, 18 :251264 [Details] 

(2009)  'Parameterized nonlinear equations on Dirichlet forms'
Kristaly, A., Varga, C. (2009) 'Parameterized nonlinear equations on Dirichlet forms'. Communications in Applied Analysis, (Special issue on Variational and Critical Point Methods in Nonlinear Analysis), 13 :317326 [Details] 

(2009)  'Existence results for asymptotic linear Hammerstein integral equations via Morse theory'
Agarwal, R.P. (2009) 'Existence results for asymptotic linear Hammerstein integral equations via Morse theory'. Commentationes Mathematicae (Prace Matematyczne), 49 :5966 [Details] 

(2009)  'Existence results for semilinear neutral functional differential equations with nonlocal conditions'
Ntouyas, S.K. (2009) 'Existence results for semilinear neutral functional differential equations with nonlocal conditions'. Differential Equations and Applications, 1 :4165 [Details] 

(2009)  'Fixed point theory for extension type maps in topological spaces'
O'Regan, D (2009) 'Fixed point theory for extension type maps in topological spaces'. Applicable Analysis, 88 :301308 [DOI] [Details] 

(2009)  'On semilinear operator equations with Fredholm mappings of nonnegative index type'
Chen, Y.Q., Kim, J.K. (2009) 'On semilinear operator equations with Fredholm mappings of nonnegative index type'. Nonlinear Functional Analysis and Applications, 14 :391401 [Details] 

(2009)  'Fixed Point Theory for Admissible Type Maps with Applications'
Agarwal, RP,O'Regan, D (2009) 'Fixed Point Theory for Admissible Type Maps with Applications'. Fixed Point Theory And Applications, [DOI] [Details] 

(2009)  'Common fixed point theorems and minimax inequalities in locally convex Hausdorff topological vector spaces'
Agarwal, RP,Balaj, M,O'Regan, D (2009) 'Common fixed point theorems and minimax inequalities in locally convex Hausdorff topological vector spaces'. Applicable Analysis, 88 :16911699 [DOI] [Details] 

(2009)  'An Approximation Approach to Eigenvalue Intervals for Singular Boundary Value Problems with Sign Changing and Superlinear Nonlinearities'
Lu, HS,Agarwal, RP,O'Regan, D (2009) 'An Approximation Approach to Eigenvalue Intervals for Singular Boundary Value Problems with Sign Changing and Superlinear Nonlinearities'. Boundary Value Problems, [DOI] [Details] 

(2009)  'LFuzzy Euclidean normed spaces and compactness'
Deschrijver, G,O'Regan, D,Saadati, R,Vaezpour, SM (2009) 'LFuzzy Euclidean normed spaces and compactness'. Chaos Solitons & Fractals, 42 :4045 [DOI] [Details] 

(2009)  'Variational approach to impulsive differential equations'
Nieto, JJ,O'Regan, D (2009) 'Variational approach to impulsive differential equations'. Nonlinear AnalysisReal World Applications, 10 :680690 [DOI] [Details] 

(2009)  'The fixed point index for compact absorbing contractive admissible maps'
O'Regan, D (2009) 'The fixed point index for compact absorbing contractive admissible maps'. Applied Mathematics And Computation, 215 :19751983 [DOI] [Details] 

(2009)  'Multiplicity Results for Second Order NonAutonomous Singular Dirichlet Systems'
Chu, JF,O'Regan, D (2009) 'Multiplicity Results for Second Order NonAutonomous Singular Dirichlet Systems'. Acta Applicandae Mathematicae, 105 :323338 [DOI] [Details] 

(2009)  'GENERALIZED DISTANCE AND COMMON FIXED POINT THEOREMS IN MENGER PROBABILISTIC METRIC SPACES'
Saadati, R,O'Regan, D,Vaezpour, SM,Kim, JK (2009) 'GENERALIZED DISTANCE AND COMMON FIXED POINT THEOREMS IN MENGER PROBABILISTIC METRIC SPACES'. Bulletin Of The Iranian Mathematical Society, 35 :97117 [Details] 

(2009)  'EXISTENCE RESULTS FOR ABSTRACT NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATIONS'
Hernandez, E,O'Regan, D (2009) 'EXISTENCE RESULTS FOR ABSTRACT NEUTRAL FUNCTIONAL DIFFERENTIAL EQUATIONS'. Proceedings Of The American Mathematical Society, 137 :33093318 [DOI] [Details] 

(2009)  'EXISTENCE OF PERIODIC SOLUTIONS FOR A CLASS OF EVEN ORDER DIFFERENTIAL EQUATIONS WITH DEVIATING ARGUMENT'
Guo, CJ,O'Regan, D,Xu, YT,Agarwal, RP (2009) 'EXISTENCE OF PERIODIC SOLUTIONS FOR A CLASS OF EVEN ORDER DIFFERENTIAL EQUATIONS WITH DEVIATING ARGUMENT'. Electronic Journal Of Qualitative Theory Of Differential Equations, [Details] 

(2008)  'Separable anisotropic differential operators in weighted abstract spaces and applications'
Agarwal, RP,O'Regan, D,Shakhmurov, VB (2008) 'Separable anisotropic differential operators in weighted abstract spaces and applications'. Journal Of Mathematical Analysis And Applications, 338 :970983 [DOI] [Details] 

(2008)  'On existence and local attractivity of solutions of a quadratic Volterra integral equation of fractional order'
Banas, J,O'Regan, D (2008) 'On existence and local attractivity of solutions of a quadratic Volterra integral equation of fractional order'. Journal Of Mathematical Analysis And Applications, 345 :573582 [DOI] [Details] 

(2008)  'LERAYSCHAUDER, LEFSCHETZ AND KRASNOSELSKII FIXED POINT THEORY IN FRECHET SPACES FOR GENERAL CLASSES OF VOLTERRA OPERATORS'
O'Regan, D,Petrusel, A (2008) 'LERAYSCHAUDER, LEFSCHETZ AND KRASNOSELSKII FIXED POINT THEORY IN FRECHET SPACES FOR GENERAL CLASSES OF VOLTERRA OPERATORS'. Fixed Point Theory, 9 :497513 [Details] 

(2008)  'Generalized contractions in partially ordered metric spaces'
Agarwal, RP,ElGebeily, MA,O'Regan, D (2008) 'Generalized contractions in partially ordered metric spaces'. Applicable Analysis, 87 :109116 [DOI] [Details] 

(2008)  'Existence, upper and lower solutions and quasilinearization for singular differential equations'
O'Regan, D,ElGebeily, M (2008) 'Existence, upper and lower solutions and quasilinearization for singular differential equations'. Ima Journal Of Applied Mathematics, 73 :323344 [DOI] [Details] 

(2008)  'Periodic solutions for a resonant system of coupled telegraphwave equations'
Agarwal, R.P., Chen, J. (2008) 'Periodic solutions for a resonant system of coupled telegraphwave equations'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser B: Applications and Algorithms), 15 :891902 [Details] 

(2008)  'Fixed point results for Ciric type contractions on a set with two separating gauge structures'
Petrusel, A., Petru, T.P. (2008) 'Fixed point results for Ciric type contractions on a set with two separating gauge structures'. Scientiae Mathematicae Japonicae, 68 :361369 [Details] 

(2008)  'Fixed point theory for _x000B_condensing set valued maps in hyperconvex metric spaces'
AminiHarandi, A., Farajzadeh, A.P., Agarwal, R.P. (2008) 'Fixed point theory for _x000B_condensing set valued maps in hyperconvex metric spaces'. Communications on Applied Nonlinear Analysis, 15 :3946 [Details] 

(2008)  'Fixed point theory for Volterra contractive operators of Matkowski type in Fr´echet spaces'
Cho, Y. (2008) 'Fixed point theory for Volterra contractive operators of Matkowski type in Fr´echet spaces'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser A: Mathematical Analysis), 15 :871884 [Details] 

(2008)  'Twin positive solutions for pLaplacian nonlinear Neumann problems via variational and degree theoretic methods'
Agarwal, R.P., Filippakis, M., Papageorgiou, N.S. (2008) 'Twin positive solutions for pLaplacian nonlinear Neumann problems via variational and degree theoretic methods'. Journal of Nonlinear and Convex Analysis, 9 :123 [Details] 

(2008)  'Some fixed point theorems in hyper Menger probabilistic quasimetric spaces'
Saadati, R., Adibi, H. (2008) 'Some fixed point theorems in hyper Menger probabilistic quasimetric spaces'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser A: Mathematical Analysis), 15 :825834 [Details] 

(2008)  'Four functionals fixed point theorem'
Avery, R,Henderson, J,O'Regan, D (2008) 'Four functionals fixed point theorem'. Mathematical And Computer Modelling, 48 :10811089 [DOI] [Details] 

(2008)  'Coincidence Point, Best Approximation, and Best Proximity Theorems for Condensing SetValued Maps in Hyperconvex Metric Spaces'
AminiHarandi, A,Farajzadeh, AP,O'Regan, D,Agarwal, RP (2008) 'Coincidence Point, Best Approximation, and Best Proximity Theorems for Condensing SetValued Maps in Hyperconvex Metric Spaces'. Fixed Point Theory And Applications, [DOI] [Details] 

(2008)  'Asymptotic nonuniform nonresonance conditions for a nonlinear discrete boundary value problem'
Ma, RY,O'Regan, D (2008) 'Asymptotic nonuniform nonresonance conditions for a nonlinear discrete boundary value problem'. Dynamic Systems And Applications, 17 :271281 [Details] 

(2008)  'An intersection theorem and its applications'
Balaji, M. (2008) 'An intersection theorem and its applications'. CUBO, 10 (4):7383 [Details] 

(2008)  'Unbounded positive solutions for second order singular boundary value problems with derivative dependence on infinite intervals'
Yan, B,O'Regan, D,Agarwal, RP (2008) 'Unbounded positive solutions for second order singular boundary value problems with derivative dependence on infinite intervals'. Funkcialaj EkvaciojSerio Internacia, 51 :81106 [Details] 

(2008)  'Multiple solutions for doubly resonant elliptic problems using critical groups'
Agarwal, R.P., Filippakis, M., Papageorgiou, N.S. (2008) 'Multiple solutions for doubly resonant elliptic problems using critical groups'. CUBO, A Mathematical Journal, 10 (3):2141 [Details] 

(2008)  'Fixed point theory in Frechet spaces for approximable and admissible Volterra type maps'
Ma, R. (2008) 'Fixed point theory in Frechet spaces for approximable and admissible Volterra type maps'. JP Journal of Fixed Point Theory and Applications, 3 :85103 [Details] 

(2008)  'Existence Results for Generalized Vector Equilibrium Problems with Multivalued Mappings via KKM Theory'
Farajzadeh, AP,AminiHarandi, A,O'Regan, D (2008) 'Existence Results for Generalized Vector Equilibrium Problems with Multivalued Mappings via KKM Theory'. Abstract And Applied Analysis, [DOI] [Details] 

(2008)  'Existence and uniqueness of positive solutions for fourthorder nonlinear singular continuous and discrete onedimensional pLaplacian problems'
Yuan, C., Jiang, D. (2008) 'Existence and uniqueness of positive solutions for fourthorder nonlinear singular continuous and discrete onedimensional pLaplacian problems'. PanAmerican Mathematical Journal, 18 :3146 [Details] 

(2008)  'Existence and uniqueness of positive solutions for fourthorder nonlinear singular continuous and discrete boundary value problems'
Yuan, CJ,Jiang, DQ,O'Regan, D (2008) 'Existence and uniqueness of positive solutions for fourthorder nonlinear singular continuous and discrete boundary value problems'. Applied Mathematics And Computation, 203 :194201 [DOI] [Details] 

(2008)  'Constantsign solutions for systems of Fredholm and Volterra integral equations: The singular case'
Agarwal, RP,O'Regan, D,Wong, PJY (2008) 'Constantsign solutions for systems of Fredholm and Volterra integral equations: The singular case'. Acta Applicandae Mathematicae, 103 :253276 [DOI] [Details] 

(2008)  'Best proximity pairs theorems for continuous set valued maps'
AminiHarandi, A., Farajzadeh, A.P., Agarwal, R.P. (2008) 'Best proximity pairs theorems for continuous set valued maps'. Fixed Point Theory and Applications, 607926 [Details] 

(2008)  'Nonexistence and Existence of Multiple Positive Solutions for Superlinear Threepoint Boundary Value Problems via Index Theory'
Yan, BQ,O'Regan, D,Agarwal, RP (2008) 'Nonexistence and Existence of Multiple Positive Solutions for Superlinear Threepoint Boundary Value Problems via Index Theory'. Acta Mathematicae Applicatae SinicaEnglish Series, 24 :529540 [DOI] [Details] 

(2008)  'LeggettWilliams theorems for coincidences of multivalued operators'
O'Regan, D,Zima, M (2008) 'LeggettWilliams theorems for coincidences of multivalued operators'. Nonlinear AnalysisTheory Methods & Applications, 68 :28792888 [DOI] [Details] 

(2008)  'Existence results on semiinfinite intervals for nonlocal evolutions equations and inclusions via semigroup theory'
Ntouyas, SK,O'Regan, D (2008) 'Existence results on semiinfinite intervals for nonlocal evolutions equations and inclusions via semigroup theory'. Numerical Functional Analysis And Optimization, 29 :419444 [DOI] [Details] 

(2008)  'On an inverse scattering algorithm for the CamassaHolm equation'
Mustafa, OG,O'Regan, D (2008) 'On an inverse scattering algorithm for the CamassaHolm equation'. Journal Of Nonlinear Mathematical Physics, 15 :283290 [Details] 

(2008)  'Best Proximity Pairs for Upper Semicontinuous SetValued Maps in Hyperconvex Metric Spaces'
AminiHarandi, A,Farajzadeh, AP,O'Regan, D,Agarwal, RP (2008) 'Best Proximity Pairs for Upper Semicontinuous SetValued Maps in Hyperconvex Metric Spaces'. Fixed Point Theory And Applications, [DOI] [Details] 

(2008)  'Positive radial solutions for pLaplacian systems'
O'Regan, D,Wang, HY (2008) 'Positive radial solutions for pLaplacian systems'. Aequationes Mathematicae, 75 :4350 [DOI] [Details] 

(2008)  'Best Proximity Pairs Theorems for Continuous SetValued Maps'
AminiHarandi, A,Farajzadeh, AP,O'Regan, D,Agarwal, RP (2008) 'Best Proximity Pairs Theorems for Continuous SetValued Maps'. Fixed Point Theory And Applications, [DOI] [Details] 

(2008)  'Multiplicity Results via Topological Degree for Impulsive Boundary Value Problems under NonWellOrdered Upper and Lower Solution Conditions'
Xian, X,O'Regan, D,Agarwal, RP (2008) 'Multiplicity Results via Topological Degree for Impulsive Boundary Value Problems under NonWellOrdered Upper and Lower Solution Conditions'. Boundary Value Problems, [DOI] [Details] 

(2008)  'ConstantSign Solutions of a System of Urysohn Integral Equations'
Agarwal, R,O'Regan, D,Wong, P (2008) 'ConstantSign Solutions of a System of Urysohn Integral Equations'. Numerical Functional Analysis And Optimization, 29 :12051239 [DOI] [Details] 

(2008)  'Existence and uniqueness of positive solutions of boundary value problems for coupled systems of singular secondorder threepoint nonlinear differential and difference equations'
Yuan, CJ,Jiang, DQ,O'Regan, D,Agarwal, RP (2008) 'Existence and uniqueness of positive solutions of boundary value problems for coupled systems of singular secondorder threepoint nonlinear differential and difference equations'. Applicable Analysis, 87 :921932 [DOI] [Details] 

(2008)  'Oscillation theorems for secondorder nonlinear neutral delay dynamic equations on time scales'
Saker, SH,O'Regan, D,Agarwal, RP (2008) 'Oscillation theorems for secondorder nonlinear neutral delay dynamic equations on time scales'. Acta Mathematica SinicaEnglish Series, 24 :14091432 [DOI] [Details] 

(2008)  'Second order problems with functional conditions including SturmLiouville and multipoint conditions'
Cabada, A,O'Regan, D,Pouso, RL (2008) 'Second order problems with functional conditions including SturmLiouville and multipoint conditions'. Mathematische Nachrichten, 281 :12541263 [DOI] [Details] 

(2008)  'Positive solutions for secondorder superlinear repulsive singular Neumann boundary value problems'
Chu, JF,Lin, XN,Jiang, DQ,O'Regan, D,Agarwal, RP (2008) 'Positive solutions for secondorder superlinear repulsive singular Neumann boundary value problems'. Positivity, 12 :555569 [DOI] [Details] 

(2008)  'Multiplicity of signchanging solutions for some fourpoint boundary value problem'
Xian, X,O'Regan, D (2008) 'Multiplicity of signchanging solutions for some fourpoint boundary value problem'. Nonlinear AnalysisTheory Methods & Applications, 69 :434447 [DOI] [Details] 

(2008)  'Dead cores of singular Dirichlet boundary value problems with phiLaplacian'
Agarwal, RP,O'Regan, D,Stanek, S (2008) 'Dead cores of singular Dirichlet boundary value problems with phiLaplacian'. Applications Of Mathematics, 53 :381399 [Details] 

(2008)  'TWIN POSITIVE SOLUTIONS FOR pLAPLACIAN NONLINEAR NEUMANN PROBLEMS VIA VARIATIONAL AND DEGREE THEORETICAL METHODS'
Agarwal, RP,Filippakis, ME,O'Regan, D,Papageorgiou, NS (2008) 'TWIN POSITIVE SOLUTIONS FOR pLAPLACIAN NONLINEAR NEUMANN PROBLEMS VIA VARIATIONAL AND DEGREE THEORETICAL METHODS'. Journal Of Nonlinear And Convex Analysis, 9 :123 [Details] 

(2008)  'Positive solutions of nonpositone Dirichlet boundary value problems with singularities in the phase variables'
Agarwal, RP,O'Regan, D,Stanek, S (2008) 'Positive solutions of nonpositone Dirichlet boundary value problems with singularities in the phase variables'. Mathematische Nachrichten, 281 :612625 [DOI] [Details] 

(2008)  'Constantsign solutions of a system of difference equations of Urysohn type'
Agarwal, RP,O'Regan, D,Wong, PJY (2008) 'Constantsign solutions of a system of difference equations of Urysohn type'. Journal Of Difference Equations And Applications, 14 :531561 [DOI] [Details] 

(2008)  'Existence theory for multiple solutions to semipositone Dirichlet boundary value problems with singular dependent nonlinearities for secondorder impulsive differential equations'
Zu, L,Jiang, DQ,O'Regan, D (2008) 'Existence theory for multiple solutions to semipositone Dirichlet boundary value problems with singular dependent nonlinearities for secondorder impulsive differential equations'. Applied Mathematics And Computation, 195 :240255 [DOI] [Details] 

(2008)  'POSITIVE SOLUTIONS FOR SINGULAR THREEPOINT BOUNDARYVALUE PROBLEMS'
Agarwal, RP,O'Regan, D,Yan, BQ (2008) 'POSITIVE SOLUTIONS FOR SINGULAR THREEPOINT BOUNDARYVALUE PROBLEMS'. Electronic Journal Of Differential Equations, [Details] 

(2008)  'FUNCTIONAL COMPRESSIONEXPANSION FIXED POINT THEOREM'
Avery, R,Henderson, J,O'Regan, D (2008) 'FUNCTIONAL COMPRESSIONEXPANSION FIXED POINT THEOREM'. Electronic Journal Of Differential Equations, [Details] 

(2008)  'EXISTENCE AND QUASILINEARIZATION FOR A CLASS OF NONLINEAR ELLIPTIC SECOND ORDER PARTIAL DIFFERENTIAL EQUATIONS'
ElGebeily, MA,O'Regan, D (2008) 'EXISTENCE AND QUASILINEARIZATION FOR A CLASS OF NONLINEAR ELLIPTIC SECOND ORDER PARTIAL DIFFERENTIAL EQUATIONS'. Dynamic Systems And Applications, 17 :445458 [Details] 

(2008)  'Development of a realtime multiplex PCR assay for the detection of multiple Salmonella serotypes in chicken samples'
O'Regan, E,McCabe, E,Burgess, C,McGuinness, S,Barry, T,Duffy, G,Whyte, P,Fanning, S (2008) 'Development of a realtime multiplex PCR assay for the detection of multiple Salmonella serotypes in chicken samples'. BMC Microbiology, 8 [DOI] [Details] 

(2008)  'Constant sign solutions of a system of Urysohn integral equations'
Agarwal, R.P., Wong, P.J.Y. (2008) 'Constant sign solutions of a system of Urysohn integral equations'. Numerical Functional Analysis and Optimization, 29 :12051239 [DOI] [Details] 

(2008)  'Bifurcation techniques for Lidstone boundary value problems'
Liu, Y,O'Regan, D (2008) 'Bifurcation techniques for Lidstone boundary value problems'. Nonlinear AnalysisTheory Methods & Applications, 68 :28012812 [DOI] [Details] 

(2008)  'THE SET OF SOLUTIONS OF INTEGRODIFFERENTIAL EQUATIONS IN BANACH SPACES'
Agarwal, RP,O'Regan, D,SikorskaNowak, A (2008) 'THE SET OF SOLUTIONS OF INTEGRODIFFERENTIAL EQUATIONS IN BANACH SPACES'. Bulletin Of The Australian Mathematical Society, 78 :507522 [DOI] [Details] 

(2008)  'Solutions of Volterra integral equations with infinite delay'
Franco, D,O'Regan, D (2008) 'Solutions of Volterra integral equations with infinite delay'. Mathematische Nachrichten, 281 :325336 [DOI] [Details] 

(2008)  'Nodal solutions for mpoint boundary value problems using bifurcation methods'
Sun, JX,Xian, X,O'Regan, D (2008) 'Nodal solutions for mpoint boundary value problems using bifurcation methods'. Nonlinear AnalysisTheory Methods & Applications, 68 :30343046 [DOI] [Details] 

(2008)  'Multiplicity results via topological degree for impulsive boundary value problems under a nonwell ordered upper and lower solution condition'
Xian, X., Agarwal, R.P. (2008) 'Multiplicity results via topological degree for impulsive boundary value problems under a nonwell ordered upper and lower solution condition'. Boundary Value Problems, 197205 [Details] 

(2008)  'Multiple solutions for sublinear impulsive threepoint boundary value problems'
Xian, X,Bingjin, W,O'Regan, D (2008) 'Multiple solutions for sublinear impulsive threepoint boundary value problems'. Applicable Analysis, 87 :10531066 [DOI] [Details] 

(2008)  'Fixed point theory for Volterra Kakutani M¨onch maps'
Banas, J. (2008) 'Fixed point theory for Volterra Kakutani M¨onch maps'. Journal of Mathematics and Applications, 30 :3341 [Details] 

(2008)  'Fixed point theory for inward set valued maps in hyperconvex metric spaces'
AminiHarandi, A., Farajzadeh, A.P., Agarwal, R.P. (2008) 'Fixed point theory for inward set valued maps in hyperconvex metric spaces'. East Asian Mathematical Journal, 24 :369375 [Details] 

(2008)  'Antipodal fixed point theory for volterra maps'
Cho, YJ,O'Regan, D,Stanek, S (2008) 'Antipodal fixed point theory for volterra maps'. Dynamic Systems And Applications, 17 :325330 [Details] 

(2008)  'Weakequilibrium problems in Gconvex spaces'
Balaj, M. (2008) 'Weakequilibrium problems in Gconvex spaces'. Rendiconti del Circolo Matematico di Palermo, 57 :103117 [Details] 

(2008)  'Positive solutions in the sense of distributions of singular boundary value problems'
Agarwal, RP,Perera, K,O'Regan, D (2008) 'Positive solutions in the sense of distributions of singular boundary value problems'. Proceedings Of The American Mathematical Society, 136 :279286 [Details] 

(2008)  'Oscillation and global attractivity in a delay periodic host macroparasite model'
Agarwal, RP,O'Regan, D,Saker, SH (2008) 'Oscillation and global attractivity in a delay periodic host macroparasite model'. Applied Mathematics And Computation, 196 :340352 [DOI] [Details] 

(2008)  'On periodic solutions for even order differential equations'
Chen, JH,O'Regan, D (2008) 'On periodic solutions for even order differential equations'. Nonlinear AnalysisTheory Methods & Applications, 69 :11381144 [DOI] [Details] 

(2008)  'Fixed point theory in Frechet spaces for inward and weakly inward Volterra type operators'
Papageorgiou, N.S. (2008) 'Fixed point theory in Frechet spaces for inward and weakly inward Volterra type operators'. Nonlinear Functional Analysis and Applications, 13 :643655 [Details] 

(2008)  'Fixed point theory for permissible maps via index theory'
Balaj, M., Cho, Y.J. (2008) 'Fixed point theory for permissible maps via index theory'. East Asian Mathematical Journal, 24 :97103 [Details] 

(2008)  'Singular integral equations arising in draining and coating flows'
O'REGAN, D. (2008) 'Singular integral equations arising in draining and coating flows'. Applied Mathematics and Computation, 205 :438441 [Details] 

(2008)  'Some results on periodic solutions for even order differential equations'
Chen, J., Tisdell, C.C. (2008) 'Some results on periodic solutions for even order differential equations'. Communications in Applied Analysis, 12 :2328 [Details] 

(2008)  'Existence and uniqueness of solutions for singular integral equation'
Cao, ZW,Jiang, DQ,Yuan, CJ,O'Regan, D (2008) 'Existence and uniqueness of solutions for singular integral equation'. Positivity, 12 :725732 [DOI] [Details] 

(2008)  'An existence principle for nonlocal difference boundary value problems with phiLaplacian and its application to singular problems'
Agarwal, RP,O'Regan, D,Stanek, S (2008) 'An existence principle for nonlocal difference boundary value problems with phiLaplacian and its application to singular problems'. Advances In Difference Equations, [DOI] [Details] 

(2008)  'Fixed point theory in Frechet spaces for M¨onch inward and contractive Urysohn type operators'
O'REGAN, D. (2008) 'Fixed point theory in Frechet spaces for M¨onch inward and contractive Urysohn type operators'. East Asian Mathematical Journal, 24 :233249 [Details] 

(2008)  'Fixed point theory in Frechet spaces for permissible Urysohn type maps'
O'REGAN, D. (2008) 'Fixed point theory in Frechet spaces for permissible Urysohn type maps'. Indian Journal of Mathematics, 50 :629646 [Details] 

(2008)  'Fixed points and homotopy results for cirictype multivalued operators on a set with two metrics'
Lazar, T,O'Regan, D,Petrusel, A (2008) 'Fixed points and homotopy results for cirictype multivalued operators on a set with two metrics'. Bulletin Of The Korean Mathematical Society, 45 :6773 [Details] 

(2008)  'Nonlinear contraction theorems in probabilistic spaces'
O'Regan, D,Saadati, R (2008) 'Nonlinear contraction theorems in probabilistic spaces'. Applied Mathematics And Computation, 195 :8693 [DOI] [Details] 

(2008)  'Degree theory for (S+) mappings in nonreflexive banach spaces'
Wang, FL,Chen, YQ,O'Regan, D (2008) 'Degree theory for (S+) mappings in nonreflexive banach spaces'. Applied Mathematics And Computation, 202 :229232 [DOI] [Details] 

(2008)  'On the inverse scattering algorithm for the CamassaHolm equation'
Mustafa, O. (2008) 'On the inverse scattering algorithm for the CamassaHolm equation'. Journal of Nonlinear Mathematical Physics, 15 :283290 [Details] 

(2008)  'Oscillation criteria for second order differential inclusions'
Agarwal, R.P., Grace, S.R. (2008) 'Oscillation criteria for second order differential inclusions'. Advanced Studies in Contemporary Mathematics (Kyungshang), 16 :4756 [Details] 

(2008)  'Constant sign solutions of a system of difference equations of Urysohn type'
Agarwal, R.P., Wong, P.J.Y. (2008) 'Constant sign solutions of a system of difference equations of Urysohn type'. Journal of Difference Equations and Applications, 14 :531561 [DOI] [Details] 

(2008)  'Constantsign solutions of a system of Volterra integral equations in Orlicz spaces'
Agarwal, R.P., Wong, P.J.Y. (2008) 'Constantsign solutions of a system of Volterra integral equations in Orlicz spaces'. Journal of Integral Equations and Applications, 20 :337378 [Details] 

(2008)  'Positive periodic solutions and eigenvalue intervals for systems of second order differential equations'
Chu, JF,Chen, H,O'Regan, D (2008) 'Positive periodic solutions and eigenvalue intervals for systems of second order differential equations'. Mathematische Nachrichten, 281 :15491556 [DOI] [Details] 

(2008)  'Positive periodic solutions of systems of functional difference equations'
Chu, J. (2008) 'Positive periodic solutions of systems of functional difference equations'. Communications in Applied Analysis, 12 :235244 [Details] 

(2008)  'Positive solutions and eigenvalue intervals for discrete boundary value problems'
Chu, J. (2008) 'Positive solutions and eigenvalue intervals for discrete boundary value problems'. Communications in Applied Analysis, 12 :245264 [Details] 

(2008)  'Positive solutions for second order singular boundary value problems with derivative dependence on infinite intervals'
Yan, BQ,O'Regan, D,Agarwal, RP (2008) 'Positive solutions for second order singular boundary value problems with derivative dependence on infinite intervals'. Acta Applicandae Mathematicae, 103 :1957 [DOI] [Details] 

(2008)  'Positive solutions of nonpositone Dirichlet boundary value problems with singularities in the phase variables'
Agarwal, R.P.; Stanˇek, S. (2008) 'Positive solutions of nonpositone Dirichlet boundary value problems with singularities in the phase variables'. Mathematische Nachrichten, 281 :612625 [DOI] [Details] 

(2008)  'Functional compressionexpansion fixed point theorems'
Avery, R., Henderson, J. (2008) 'Functional compressionexpansion fixed point theorems'. Electronic Journal of Differential Equations, 22 :112 [Details] 

(2008)  'Generalized fcomplementarity problems in Banach spaces'
Huang, NJ,Li, J,O'Regan, D (2008) 'Generalized fcomplementarity problems in Banach spaces'. Nonlinear AnalysisTheory Methods & Applications, 68 :38283840 [DOI] [Details] 

(2008)  'An approximation approach to eigenvalue intervals for singular boundary value problems with sign changing nonlinearities'
Lu, H,O'Regan, D,Agarwal, RP (2008) 'An approximation approach to eigenvalue intervals for singular boundary value problems with sign changing nonlinearities'. Mathematical Inequalities & Applications, 11 :8198 [Details] 

(2008)  'Fixed point theory for compact absorbing contractive admissible type maps'
Agarwal, RP,O'Regan, D (2008) 'Fixed point theory for compact absorbing contractive admissible type maps'. Applicable Analysis, 87 :497508 [DOI] [Details] 

(2008)  'Fixed point theorems for generalized contractions in ordered metric spaces'
O'Regan, D,Petrusel, A (2008) 'Fixed point theorems for generalized contractions in ordered metric spaces'. Journal Of Mathematical Analysis And Applications, 341 :12411252 [DOI] [Details] 

(2008)  'Convergence theorems for semigrouptype families of nonself mappings'
Sahu, D.R. (2008) 'Convergence theorems for semigrouptype families of nonself mappings'. Rendiconti del Circolo Matematico di Palermo, 57 :305329 [Details] 

(2008)  'A common fixed point theorem for Rweakly commuting mappings in probabilistic spaces with nonlinear contractive conditions'
Jesic, SN,O'Regan, D,Babacev, NA (2008) 'A common fixed point theorem for Rweakly commuting mappings in probabilistic spaces with nonlinear contractive conditions'. Applied Mathematics And Computation, 201 :272281 [DOI] [Details] 

(2008)  'Six functionals fixed point theorem'
Avery, R., Henderson, J. (2008) 'Six functionals fixed point theorem'. Communications in Applied Analysis, 12 :6982 [Details] 

(2007)  'On the existence of two nontrivial solutions of periodic problems with operators of pLaplacian type'
Agarwal, RP,O'Regan, D,Papageorgiou, NS (2007) 'On the existence of two nontrivial solutions of periodic problems with operators of pLaplacian type'. Differential Equations, 43 :157163 [DOI] [Details] 

(2007)  'Second order initial value problems of LaneEmden type'
Agarwal, RP,O'Regan, D (2007) 'Second order initial value problems of LaneEmden type'. Applied Mathematics Letters, 20 :11981205 [DOI] [Details] 

(2007)  'Philostype oscillation criteria for second order halflinear dynamic equations on time scales'
Agarwal, RP,O'Regan, D,Saker, SH (2007) 'Philostype oscillation criteria for second order halflinear dynamic equations on time scales'. Rocky Mountain Journal Of Mathematics, 37 :10851104 [Details] 

(2007)  'Positive and dead core solutions of singular Dirichlet boundary value problems with phiLaplacian'
Agarwal, RP,O'Regan, D,Stanek, S (2007) 'Positive and dead core solutions of singular Dirichlet boundary value problems with phiLaplacian'. Computers & Mathematics With Applications, 54 :255266 [DOI] [Details] 

(2007)  'Oscillation of secondorder damped dynamic equations on time scales'
Saker, SH,Agarwal, RP,O'Regan, D (2007) 'Oscillation of secondorder damped dynamic equations on time scales'. Journal Of Mathematical Analysis And Applications, 330 :13171337 [DOI] [Details] 

(2007)  'Antiperiodic solutions for fully nonlinear firstorder differential equations'
Chen, YQ,Nieto, JJ,O'Regan, D (2007) 'Antiperiodic solutions for fully nonlinear firstorder differential equations'. Mathematical And Computer Modelling, 46 :11831190 [DOI] [Details] 

(2007)  'Nonuniform nonresonance for nonlinear boundary value problems with y ' dependence'
Agarwal, RP,O'Regan, D,Precup, R (2007) 'Nonuniform nonresonance for nonlinear boundary value problems with y ' dependence'. Dynamic Systems And Applications, 16 :587594 [Details] 

(2007)  'Positive solutions for nonresonant singular boundaryvalue problems with a linear term'
Lu, HS,O'Regan, D,Agarwal, RP (2007) 'Positive solutions for nonresonant singular boundaryvalue problems with a linear term'. Proceedings Of The Edinburgh Mathematical Society, 50 :217228 [DOI] [Details] 

(2007)  'Positive solutions to singular boundary value problems with sign changing nonlinearities on the halfline via upper and lower solutions'
Yan, BQ,O'Regan, D,Agarwal, RP (2007) 'Positive solutions to singular boundary value problems with sign changing nonlinearities on the halfline via upper and lower solutions'. Acta Mathematica SinicaEnglish Series, 23 :14471456 [DOI] [Details] 

(2007)  'Oscillation results for secondorder nonlinear neutral delay dynamic equations on time scales'
Saker, SH,Agarwal, RP,O'Regan, D (2007) 'Oscillation results for secondorder nonlinear neutral delay dynamic equations on time scales'. Applicable Analysis, 86 :117 [DOI] [Details] 

(2007)  'Dead core problems for singular equations with phiLaplacian'
Agarwal, RP,O'Regan, D,Stanek, S (2007) 'Dead core problems for singular equations with phiLaplacian'. Boundary Value Problems, [DOI] [Details] 

(2007)  'Solutions in weighted spaces of singular boundary value problems on the halfline'
O'Regan, D,Yan, BQ,Agarwal, RP (2007) 'Solutions in weighted spaces of singular boundary value problems on the halfline'. Journal Of Computational And Applied Mathematics, 205 :751763 [DOI] [Details] 

(2007)  'LeggettWilliams normtype fixed point theorems for multivalued mappings'
O'Regan, D,Zima, M (2007) 'LeggettWilliams normtype fixed point theorems for multivalued mappings'. Applied Mathematics And Computation, 187 :12381249 [DOI] [Details] 

(2007)  'Existence of solutions to an initial value problem for the differential equation f(t, x, x ')=0 using barrier strips'
Kelevedjiev, PS,O'Regan, D,Seman, J (2007) 'Existence of solutions to an initial value problem for the differential equation f(t, x, x ')=0 using barrier strips'. Nonlinear AnalysisTheory Methods & Applications, 67 :15041512 [DOI] [Details] 

(2007)  'Existence and controllability results for first and secondorder functional semilinear differential inclusions with nonlocal conditions'
Gorniewicz, L,Ntouyas, SK,O'Regan, D (2007) 'Existence and controllability results for first and secondorder functional semilinear differential inclusions with nonlocal conditions'. Numerical Functional Analysis And Optimization, 28 :5382 [DOI] [Details] 

(2007)  'Existence, uniqueness, stochastic persistence and global stability of positive solutions of the logistic equation with random perturbation'
Ji, C,Jiang, D,Shi, N,O'Regan, D (2007) 'Existence, uniqueness, stochastic persistence and global stability of positive solutions of the logistic equation with random perturbation'. Mathematical Methods In The Applied Sciences, 30 :7789 [DOI] [Details] 

(2007)  'Multiplicity results for threepoint boundary value problems with a nonwellordered upper and lower solution condition'
Xian, X,O'Regan, D,Sun, JX (2007) 'Multiplicity results for threepoint boundary value problems with a nonwellordered upper and lower solution condition'. Mathematical And Computer Modelling, 45 :189200 [DOI] [Details] 

(2007)  'Positive solutions for singular boundary value problems with sign changing nonlinearities depending on x ' via index theory'
Agarwal, RP,O'Regan, D,Yan, BQ (2007) 'Positive solutions for singular boundary value problems with sign changing nonlinearities depending on x ' via index theory'. Applicable Analysis, 86 :1939 [DOI] [Details] 

(2007)  'Upper and lower solutions and quasilinearization for a class of second order singular nonlinear differential equations with nonlinear boundary conditions'
ElGebeily, M,O'Regan, D (2007) 'Upper and lower solutions and quasilinearization for a class of second order singular nonlinear differential equations with nonlinear boundary conditions'. Nonlinear AnalysisReal World Applications, 8 :636645 [DOI] [Details] 

(2007)  'Oscillation theorems for second order differential inclusions'
Agarwal, R.P., Grace, S.R. (2007) 'Oscillation theorems for second order differential inclusions'. International Journal of Dynamical Systems and Differential Equations, 1 :8588 [Details] 

(2007)  'Nontrivial solutions in abstract cones for Hammerstein integral systems'
Franco, D., Infante, G. (2007) 'Nontrivial solutions in abstract cones for Hammerstein integral systems'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser A: Mathematical Analysis), 14 :837850 [Details] 

(2007)  'Multiple positive solutions for singular problems with mixed boundary data and derivative dependence'
Yan, BQ,O'Regan, D,Agarwal, RP (2007) 'Multiple positive solutions for singular problems with mixed boundary data and derivative dependence'. Mathematical And Computer Modelling, 45 :404430 [DOI] [Details] 

(2007)  'Existence to singular discrete boundary value problems with sign changing nonlinearities using approximation methods'
Lu, HS,O'Regan, D,Agarwal, RP (2007) 'Existence to singular discrete boundary value problems with sign changing nonlinearities using approximation methods'. Studia Scientiarum Mathematicarum Hungarica, 44 :8195 [DOI] [Details] 

(2007)  'Existence for set differential equations via multivalued operator equations'
Agarwal, R.P. (2007) 'Existence for set differential equations via multivalued operator equations'. International Journal of Mathematics, Game Theory and Algebra, 16 :541545 [Details] 

(2007)  'A quasilinearization method for a class of second order singular nonlinear differential equations with nonlinear boundary conditions'
ElGebeily, M,O'Regan, D (2007) 'A quasilinearization method for a class of second order singular nonlinear differential equations with nonlinear boundary conditions'. Nonlinear AnalysisReal World Applications, 8 :174186 [DOI] [Details] 

(2007)  'A Lefschetz fixed point theorem for admissible maps in Frechet spaces'
Agarwal, RP,O'Regan, D (2007) 'A Lefschetz fixed point theorem for admissible maps in Frechet spaces'. Dynamic Systems And Applications, 16 :112 [Details] 

(2007)  'The monotone method for Neumann functional differential equations with upper and lower solutions in the reverse order'
Jiang, DQ,Yang, Y,Chu, JF,O'Regan, D (2007) 'The monotone method for Neumann functional differential equations with upper and lower solutions in the reverse order'. Nonlinear AnalysisTheory Methods & Applications, 67 :28152828 [DOI] [Details] 

(2007)  'On solutions for differential equations in Banach spaces via a new measure of weak compactness'
Barroso, CS,O'Regan, D,Agarwal, RP (2007) 'On solutions for differential equations in Banach spaces via a new measure of weak compactness'. Dynamics Of Continuous Discrete And Impulsive SystemsSeries AMathematical Analysis, 14 :199203 [Details] 

(2007)  'Upper and lower solutions of differential equations via approximate derivatives and the Denjoy integral'
Bugajewska, D. (2007) 'Upper and lower solutions of differential equations via approximate derivatives and the Denjoy integral'. Trends in African Diaspora Mathematics Research, :110 [Details] 

(2007)  'Some results on intuitionistic fuzzy spaces'
Hosseini, SB,O'Regan, D,Saadati, R (2007) 'Some results on intuitionistic fuzzy spaces'. Iranian Journal Of Fuzzy Systems, 4 :5364 [Details] 

(2007)  'Fixed point theory in Frechet spaces for Volterra type operators'
O'Regan, D,Xian, X (2007) 'Fixed point theory in Frechet spaces for Volterra type operators'. Applicable Analysis, 86 :12371248 [DOI] [Details] 

(2007)  'Controllability for semilinear neutral functional differential inclusions via analytic semigroups'
Ntouyas, SK,O'Regan, D (2007) 'Controllability for semilinear neutral functional differential inclusions via analytic semigroups'. Journal Of Optimization Theory And Applications, 135 :491513 [DOI] [Details] 

(2007)  'Deblurring and denoising of images with minimization of variation and negative norms'
Cherid, A,ElGebeily, MA,O'Regan, D,Agarwal, R (2007) 'Deblurring and denoising of images with minimization of variation and negative norms'. Anziam Journal, 49 :171185 [Details] 

(2007)  'Existence for set differential equations via multivalued operator equations'
Agarwal, R.P. (2007) 'Existence for set differential equations via multivalued operator equations'. Differential Equations and Applications, 5 :15 [Details] 

(2007)  'Oscillation of certain fourth order functional differential equations'
Agarwal, R.P., Grace, S.R. (2007) 'Oscillation of certain fourth order functional differential equations'. Ukrainian Mathematical Journal, 59 :315342 [Details] 

(2007)  'Constantsign solutions of a system of integral equations with integrable singularities'
Agarwal, R.P., Wong, P.J.Y. (2007) 'Constantsign solutions of a system of integral equations with integrable singularities'. Jour. Integral Equations and Applications, 19 :117142 [Details] 

(2007)  'Constantsign solutions of a system of Volterra integral equations'
Agarwal, RP,O'Regan, D,Tisdell, CC,Wong, PJY (2007) 'Constantsign solutions of a system of Volterra integral equations'. Computers & Mathematics With Applications, 54 :5875 [DOI] [Details] 

(2007)  'Multiple positive solutions via index theory for singular boundary value problems with derivative dependence'
Yan, BQ,O'Regan, D,Agarwal, RP (2007) 'Multiple positive solutions via index theory for singular boundary value problems with derivative dependence'. Positivity, 11 :687720 [DOI] [Details] 

(2007)  'Positive solutions of nonlinear systems with plaplacian on finite and semiinfinite intervals'
O'Regan, D,Precup, R (2007) 'Positive solutions of nonlinear systems with plaplacian on finite and semiinfinite intervals'. Positivity, 11 :537548 [DOI] [Details] 

(2007)  'Quotient probabilistic normed spaces and completeness results'
LafuerzaGuillen, B,O'Regan, D,Saadati, R (2007) 'Quotient probabilistic normed spaces and completeness results'. Proceedings Of The Indian Academy Of SciencesMathematical Sciences, 117 :6170 [Details] 

(2007)  'R_x000E_ solution sets of integral inclusions on a noncompact interval via maximal solutions'
Liu, X. (2007) 'R_x000E_ solution sets of integral inclusions on a noncompact interval via maximal solutions'. Dynamics of Continuous, Discrete and Impulsive Systems (Ser A: Mathematical Analysis), 14 :685694 [Details] 

(2007)  'Generalized Icontractions and pointwise Rsubweakly commuting maps'
O'Regan, D,Hussain, N (2007) 'Generalized Icontractions and pointwise Rsubweakly commuting maps'. Acta Mathematica SinicaEnglish Series, 23 :15051508 [DOI] [Details] 

(2007)  'An implicit iteration scheme with errors for a finite family of uniformly continuous mappings'
Fukharuddin, M., Khan, A.R., Agarwal, R.P. (2007) 'An implicit iteration scheme with errors for a finite family of uniformly continuous mappings'. Functional Differential Equations, 14 :245256 [Details] 

(2007)  'ITERATIVE CONSTRUCTION OF FIXED POINTS OF NEARLY ASYMPTOTICALLY NONEXPANSIVE MAPPINGS'
Agarwal, RP,O'Regan, D,Sahu, DR (2007) 'ITERATIVE CONSTRUCTION OF FIXED POINTS OF NEARLY ASYMPTOTICALLY NONEXPANSIVE MAPPINGS'. Journal Of Nonlinear And Convex Analysis, 8 :6179 [Details] 

(2007)  'Lefschetz and antipodal fixed point theory for multivalued maps of Urysohn type'
O'REGAN, D. (2007) 'Lefschetz and antipodal fixed point theory for multivalued maps of Urysohn type'. Nonlinear Analysis Forum, 12 :241252 [Details] 

(2007)  'Domain invariance theorems for contractive type maps'
Agarwal, RP,O'Regan, D,Precup, R (2007) 'Domain invariance theorems for contractive type maps'. Dynamic Systems And Applications, 16 :579586 [Details] 

(2007)  'Controllability of evolution inclusions in Banach spaces with nonlocal conditions'
Gorniewicz, L., Ntouyas, S.K. (2007) 'Controllability of evolution inclusions in Banach spaces with nonlocal conditions'. Nonlinear Analysis Forum, 12 :103117 [Details] 

(2007)  'Fixed point theory for weakly inward Kakutani maps: The projective limit approach'
Agarwal, RP,O'Regan, D (2007) 'Fixed point theory for weakly inward Kakutani maps: The projective limit approach'. Proceedings Of The American Mathematical Society, 135 :417426 [Details] 

(2007)  'Existence results for semilinear neutral functional differential inclusions via analytic semigroups'
Ntouyas, SK,O'Regan, D (2007) 'Existence results for semilinear neutral functional differential inclusions via analytic semigroups'. Acta Applicandae Mathematicae, 98 :223253 [DOI] [Details] 

(2007)  'Existence to singular boundary value problems with sign changing nonlinearities using an approximation method approach'
Lu, H,O'Regan, D,Agarwal, RP (2007) 'Existence to singular boundary value problems with sign changing nonlinearities using an approximation method approach'. Applications Of Mathematics, 52 :117135 [Details] 

(2007)  'Fixed point theory for multivalued maps in Fr´echet spaces via degree and index theory'
Agarwal, R.P., Sahu, D.R. (2007) 'Fixed point theory for multivalued maps in Fr´echet spaces via degree and index theory'. Discussiones Mathematicae. Differential Inclusions, Control and Optimization, 27 :399409 [Details] 

(2007)  'FIXED POINT THEORY FOR ADMISSIBLE PAIRS AND MAPS IN FRECHET SPACES VIA DEGREE THEORY'
Ma, RY,O'Regan, D,Precup, R (2007) 'FIXED POINT THEORY FOR ADMISSIBLE PAIRS AND MAPS IN FRECHET SPACES VIA DEGREE THEORY'. Fixed Point Theory, 8 :273283 [Details] 

(2007)  'A dual of the compressionexpansion fixed point theorems'
Avery, R,Henderson, J,O'Regan, D (2007) 'A dual of the compressionexpansion fixed point theorems'. Fixed Point Theory And Applications, [DOI] [Details] 

(2007)  'Positive solutions and eigenvalue intervals for nonlinear systems'
Chu, JF,O'Regan, D,Zhang, MR (2007) 'Positive solutions and eigenvalue intervals for nonlinear systems'. Proceedings Of The Indian Academy Of SciencesMathematical Sciences, 117 :8595 [Details] 

(2007)  'On the number of positive solutions of elliptic systems'
O'Regan, D,Wang, HY (2007) 'On the number of positive solutions of elliptic systems'. Mathematische Nachrichten, 280 :14171430 [DOI] [Details] 

(2007)  'Nonlinear integral equations singular in the dependent variable'
O'Regan, D,Agarwal, RP,Perera, K (2007) 'Nonlinear integral equations singular in the dependent variable'. Applied Mathematics Letters, 20 :11371141 [DOI] [Details] 

(2007)  'Multiple positive solutions of singular second order boundary value problems with derivative dependence'
Yan, B., Agarwal, R.P. (2007) 'Multiple positive solutions of singular second order boundary value problems with derivative dependence'. Aequationes Mathematicae, 74 :6280 [Details] 

(2007)  'Lefschetz fixed point theorems for approximative type maps in Fr´echet spaces'
O'REGAN, D. (2007) 'Lefschetz fixed point theorems for approximative type maps in Fr´echet spaces'. Commentationes Mathematicae (Prace Matematyczne), 47 :109116 [Details] 

(2007)  'Forced oscillation for general differential equations'
Agarwal, R.P., Grace, S.R. (2007) 'Forced oscillation for general differential equations'. Annals of Differential Equations, 23 :5061 [Details] 

(2007)  'Fixed point theorems of Matkowski type on complete gauge spaces'
Papageorgiou, N.S. (2007) 'Fixed point theorems of Matkowski type on complete gauge spaces'. Journal of Nonlinear Functional Analysis and Differential Equations, 1 :213222 [Details] 

(2007)  'Existence and controllability results for semilinear neutral functional differential inclusions with nonlocal conditions'
Ntouyas, S.K. (2007) 'Existence and controllability results for semilinear neutral functional differential inclusions with nonlocal conditions'. Discussiones Mathematicae. Differential Inclusions, Control and Optimization, 27 :213264 [Details] 

(2007)  'Existence and boundary behavior for singular nonlinear differential equations with arbitrary boundary conditions'
ElGebeily, M,O'Regan, D (2007) 'Existence and boundary behavior for singular nonlinear differential equations with arbitrary boundary conditions'. Journal Of Mathematical Analysis And Applications, 334 :140156 [DOI] [Details] 

(2007)  'Dynamics of epidemics in homogeneous/heterogeneous populations and the spreading of multiple interrelated infectious diseases: Constantsign periodic solutions for the discrete model'
Agarwal, RP,O'Regan, D,Wong, PJY (2007) 'Dynamics of epidemics in homogeneous/heterogeneous populations and the spreading of multiple interrelated infectious diseases: Constantsign periodic solutions for the discrete model'. Nonlinear AnalysisReal World Applications, 8 :10401061 [DOI] [Details] 

(2007)  'Construction of upper and lower solutions for singular pLaplacian equations with sign changing nonlinearities'
L¨u, H. (2007) 'Construction of upper and lower solutions for singular pLaplacian equations with sign changing nonlinearities'. Differential Equations and Applications, 5 :8198 [Details] 

(2007)  'Coincidence points and invariant approximation results for multimaps'
O'Regan, D,Shahzad, N (2007) 'Coincidence points and invariant approximation results for multimaps'. Acta Mathematica SinicaEnglish Series, 23 :16011610 [DOI] [Details] 

(2007)  'A note on nonuniform nonresonance for nonlinear boundary value problems with y0 dependence'
Agarwal, R.P., Precup, R. (2007) 'A note on nonuniform nonresonance for nonlinear boundary value problems with y0 dependence'. Dynamic Systems and Applications, 16 :587594 [Details] 

(2007)  'The periodic boundary value problem for semilinear elastic beam equations: The resonance case'
Chen, JH,O'Regan, D (2007) 'The periodic boundary value problem for semilinear elastic beam equations: The resonance case'. Computers & Mathematics With Applications, 53 :12841292 [DOI] [Details] 

(2007)  'Random fixed points and a LeraySchauder alternative for random multivalued generalized contractive maps'
O'REGAN, D. (2007) 'Random fixed points and a LeraySchauder alternative for random multivalued generalized contractive maps'. International Journal of Mathematical Sciences, 6 :19 [Details] 

(2007)  'Quasivariational inequalities, coincidence and collectively fixed point results for U c maps'
Shahzad, N. (2007) 'Quasivariational inequalities, coincidence and collectively fixed point results for U c maps'. Advances in Nonlinear Variational Inequalities, 10 :120 [Details] 

(2007)  'Existence results for first and second order semilinear differential inclusions with nonlocal conditions'
Gorniewicz, L,Ntouyas, SK,O'Regan, D (2007) 'Existence results for first and second order semilinear differential inclusions with nonlocal conditions'. Journal Of Computational Analysis And Applications, 9 :287310 [Details] 

(2007)  'Existence and quasilinearization in Hilbert spaces revisited'
O'Regan, D,ElGebeily, M (2007) 'Existence and quasilinearization in Hilbert spaces revisited'. Applicable Analysis, 86 :411419 [DOI] [Details] 

(2007)  'Nodal and multiple constant sign solution for equations with the pLaplacian'
Agarwal, R.P., Filippakis, M., Papageorgiou, N.S. (2007) 'Nodal and multiple constant sign solution for equations with the pLaplacian'. Differential Equations, Chaos and Variational Problems. Progress in Nonlinear Differential Equations and Applications, 75 :114 [Details] 

(2007)  'Nonlinear boundary value problems on semiinfinite intervals using weighted spaces: An upper and lower solution approach'
O'Regan, D,Yan, B,Agarwal, RP (2007) 'Nonlinear boundary value problems on semiinfinite intervals using weighted spaces: An upper and lower solution approach'. Positivity, 11 :171189 [DOI] [Details] 

(2006)  'A boundary value problem on the halfline via critical point methods'
Bonanno, G,O'Regan, D (2006) 'A boundary value problem on the halfline via critical point methods'. Dynamic Systems And Applications, 15 :395407 [Details] 

(2006)  'Unbounded solutions for singular boundary value problems on the semiinfinite interval: Upper and lower solutions and multiplicity'
Yan, BQ,O'Regan, D,Agarwal, RP (2006) 'Unbounded solutions for singular boundary value problems on the semiinfinite interval: Upper and lower solutions and multiplicity'. Journal Of Computational And Applied Mathematics, 197 :365386 [DOI] [Details] 

(2006)  'Multivalued Hessential maps of acyclic type on Hausdorff topological spaces'
O'REGAN, D. (2006) 'Multivalued Hessential maps of acyclic type on Hausdorff topological spaces'. Jour. Applied Mathematics and Stochastic Analysis, 36461 [Details] 

(2006)  'Krasnoselskii’s fixed point theorem for composite maps and for weakly sequentially upper semicontinuous maps'
O'REGAN, D. (2006) 'Krasnoselskii’s fixed point theorem for composite maps and for weakly sequentially upper semicontinuous maps'. JP Journal of Fixed Point Theory and Applications, 1 :101108 [Details] 

(2006)  'DEGREE THEORETIC METHODS IN THE STUDY OF NONLINEAR PERIODIC PROBLEMS WITH NONSMOOTH POTENTIALS'
Agarwal, RP,Filippakis, ME,O'Regan, D,Papageorgiou, NS (2006) 'DEGREE THEORETIC METHODS IN THE STUDY OF NONLINEAR PERIODIC PROBLEMS WITH NONSMOOTH POTENTIALS'. Differential And Integral Equations, 19 :279296 [Details] 

(2006)  'Coincidence degree theory for mappings of class L  (S+)'
Chen, Y.Q. (2006) 'Coincidence degree theory for mappings of class L  (S+)'. Applicable Analysis, 85 :963970 [Details] 

(2006)  'A note on the projective limit approach to fixed point theorems for multimaps defined on subsets of Fr´echet spaces'
O'REGAN, D. (2006) 'A note on the projective limit approach to fixed point theorems for multimaps defined on subsets of Fr´echet spaces'. Nonlinear Analysis Forum, 11 :147152 [Details] 

(2006)  'Properties of bounded solutions of nonlinear dynamic equations on time scales'
Agarwal, R.P., Saker, S.H. (2006) 'Properties of bounded solutions of nonlinear dynamic equations on time scales'. Canadian Appl. Math. Quarterly, 14 :110 [Details] 

(2006)  'LeraySchauder results for inward acyclic and approximable maps defined on Frechet spaces'
O'Regan, D (2006) 'LeraySchauder results for inward acyclic and approximable maps defined on Frechet spaces'. Applied Mathematics Letters, 19 :976982 [DOI] [Details] 

(2006)  'Fixed points of cone compression and expansion multimaps defined on Fr´echet spaces: the projective limit approach'
Agarwal, R.P. (2006) 'Fixed points of cone compression and expansion multimaps defined on Fr´echet spaces: the projective limit approach'. Jour. Applied Mathematics and Stochastic Analysis, 92375 [Details] 

(2006)  'Fixed point theory for multimaps defined on closed subsets of Fr´echet spaces: the projective limit approach'
Agarwal, R.P. (2006) 'Fixed point theory for multimaps defined on closed subsets of Fr´echet spaces: the projective limit approach'. Commentationes Mathematicae (Prace Matematyczne), 46 :169179 [Details] 

(2006)  'An eigenvalue interval of solutions for a singular discrete boundary value problem with sign changing nonlinearities'
Lu, HS,O'Regan, D,Agarwal, RP (2006) 'An eigenvalue interval of solutions for a singular discrete boundary value problem with sign changing nonlinearities'. Journal Of Difference Equations And Applications, 12 :717730 [DOI] [Details] 

(2006)  'Controllability results for first and second order evolution inclusions with nonlocal conditions'
Gorniewicz, L., Ntouyas, S.K. (2006) 'Controllability results for first and second order evolution inclusions with nonlocal conditions'. Annales Polonici Mathematici, 89 :65101 [Details] 

(2006)  'Differential inclusions on proximate retracts of separable Hilbert spaces'
Agarwal, RP,O'Regan, D (2006) 'Differential inclusions on proximate retracts of separable Hilbert spaces'. Rocky Mountain Journal Of Mathematics, 36 :765781 [Details] 

(2006)  'On the solvability of a singular initial value problem x0 = f(t, x, x0) using barrier strips'
Kelevedjiev, P.S. (2006) 'On the solvability of a singular initial value problem x0 = f(t, x, x0) using barrier strips'. Nonlinear Analysis, 64 :726738 [Details] 

(2006)  'Existence of positive solutions for operator equations and applications to semipositone problems'
Xian, X,O'Regan, D (2006) 'Existence of positive solutions for operator equations and applications to semipositone problems'. Positivity, 10 :315328 [DOI] [Details] 

(2006)  'Common fixed point theorems in Lfuzzy metric spaces'
Adibi, H,Cho, YJ,O'Regan, D,Saadati, R (2006) 'Common fixed point theorems in Lfuzzy metric spaces'. Applied Mathematics And Computation, 182 :820828 [DOI] [Details] 

(2006)  'Multiplicity of positive periodic solutions to second order differential equations'
Chu, JF,Lin, XN,Jiang, DQ,O'Regan, D,Agarwal, RP (2006) 'Multiplicity of positive periodic solutions to second order differential equations'. Bulletin Of The Australian Mathematical Society, 73 :175182 [Details] 

(2006)  'Constant sign solutions of systems of higher order boundary value problems with integrable singularities'
Agarwal, R.P., Wong, P.J.Y. (2006) 'Constant sign solutions of systems of higher order boundary value problems with integrable singularities'. Mathematical and Computer Modelling, 44 :9831008 [DOI] [Details] 

(2006)  'BirkhoffKellogg and best proximity pair results'
O'Regan, D,Shahzad, N,Agarwal, RP (2006) 'BirkhoffKellogg and best proximity pair results'. Bulletin Of The Belgian Mathematical SocietySimon Stevin, 13 :645655 [Details] 

(2006)  'Multiple positive solutions of singular positone Dirichlet problems with derivative dependence'
Yan, BQ,O'Regan, D,Agarwal, RP (2006) 'Multiple positive solutions of singular positone Dirichlet problems with derivative dependence'. Glasgow Mathematical Journal, 48 :309329 [DOI] [Details] 

(2006)  'Multiple positive solutions of singular problems by variational methods'
Agarwal, RP,Perera, K,O'Regan, D (2006) 'Multiple positive solutions of singular problems by variational methods'. Proceedings Of The American Mathematical Society, 134 :817824 [Details] 

(2006)  'Positive and nontrivial solutions for the Urysohn integral equation'
Franco, D,Infante, G,O'Regan, D (2006) 'Positive and nontrivial solutions for the Urysohn integral equation'. Acta Mathematica SinicaEnglish Series, 22 :17451750 [DOI] [Details] 

(2006)  'Positive radial solutions for a quasilinear system'
L¨u, H., Agarwal, R.P. (2006) 'Positive radial solutions for a quasilinear system'. Applicable Analysis, 85 :363371 [Details] 

(2006)  'Positive solutions for regular and singular fourthorder boundary value problems'
Chu, J. (2006) 'Positive solutions for regular and singular fourthorder boundary value problems'. Communications in Applied Analysis, 10 :185199 [Details] 

(2006)  'A Lefschetz fixed point theorem in Fr´echet spaces for multivalued maps using the projective limit approach'
O'REGAN, D. (2006) 'A Lefschetz fixed point theorem in Fr´echet spaces for multivalued maps using the projective limit approach'. Nonlinear Analysis Forum, 11 :109115 [Details] 

(2006)  'Fuzzy multivalued variational inclusions in Banach spaces'
Chang, SS,O'Regan, D,Kim, JK (2006) 'Fuzzy multivalued variational inclusions in Banach spaces'. Journal Of Inequalities And Applications, [DOI] [Details] 

(2006)  'A three solutions theorem for nonlinear operator equations in ordered Banach spaces'
Xian, X,O'Regan, D (2006) 'A three solutions theorem for nonlinear operator equations in ordered Banach spaces'. Positivity, 10 :647664 [DOI] [Details] 

(2006)  'Generalized degree theory for semilinear operator equations'
Chen, Y.Q. (2006) 'Generalized degree theory for semilinear operator equations'. Glasgow Math. Journal, 48 :6573 [Details] 

(2006)  'An essential map approach for multimaps defined on closed subsets of Fr´echet spaces'
O'REGAN, D. (2006) 'An essential map approach for multimaps defined on closed subsets of Fr´echet spaces'. Applicable Analysis, 85 :503513 [Details] 

(2006)  'An upper and lower solution theory for the problem (G0(y))0 + f(t, y) = 0 on finite and infinite intervals'
Agarwal, R.P.; Stanˇek, S. (2006) 'An upper and lower solution theory for the problem (G0(y))0 + f(t, y) = 0 on finite and infinite intervals'. Acta Mathematica Sinica (English Series), 22 :827832 [Details] 

(2006)  'Aronszajn type theorems for integral equations on unbounded domains via maximal solutions'
Precup, R. (2006) 'Aronszajn type theorems for integral equations on unbounded domains via maximal solutions'. Fixed Point Theory, 7 :305313 [Details] 

(2006)  'Lefschetz fixed point theorems for compact morphisms'
Agarwal, R.P. (2006) 'Lefschetz fixed point theorems for compact morphisms'. Fixed Point Theory, 7 :175190 [Details] 

(2006)  'Common fixed points of two commuting mappings in complete metric spaces'
Suzuki, T., Saadati, R. (2006) 'Common fixed points of two commuting mappings in complete metric spaces'. Bulletin Iranian Mathematical Society, 32 :5366 [Details] 

(2006)  'Coincidence points and best proximity pair results for Rsubweakly commuting multimaps'
Shahzad, N (2006) 'Coincidence points and best proximity pair results for Rsubweakly commuting multimaps'. Demonstratio Math, 39 :845854 [Details] 

(2006)  'Maximal solutions and multivalued differential and integral inclusions on a noncompact interval'
O'REGAN, D. (2006) 'Maximal solutions and multivalued differential and integral inclusions on a noncompact interval'. Nonlinear Functional Analysis and Applications, 11 :335342 [Details] 

(2006)  'LeraySchauder results for multivalued nonlinear contractions defined on closed subsets of a Fr´echet space'
Agarwal, R.P. (2006) 'LeraySchauder results for multivalued nonlinear contractions defined on closed subsets of a Fr´echet space'. International Journal of Mathematics and Mathematical Sciences, 43635 [Details] 

(2006)  'Fixed point theory for generalized contractive maps on spaces with vectorvalued metrics'
Shahzad, N., Agarwal, R.P. (2006) 'Fixed point theory for generalized contractive maps on spaces with vectorvalued metrics'. Fixed Point Theory and Applications, 6 :143149 [Details] 

(2006)  'Completely generalized nonlinear variational inclusions with fuzzy setvalued mappings'
Agarwal, R.P., Khan, M.F., Salahuddin (2006) 'Completely generalized nonlinear variational inclusions with fuzzy setvalued mappings'. Jour. of Concrete and Applicable Mathematics, 4 :215228 [Details] 

(2006)  'A variational approach to singular quasilinear elliptic problems with sign changing nonlinearities'
Agarwal, R.P., Perera, K. (2006) 'A variational approach to singular quasilinear elliptic problems with sign changing nonlinearities'. Applicable Analysis, 85 :12011206 [Details] 

(2006)  'Topological structure of solution sets in Frechet spaces: The projective limit approach'
O'Regan, D (2006) 'Topological structure of solution sets in Frechet spaces: The projective limit approach'. Journal Of Mathematical Analysis And Applications, 324 :13701380 [DOI] [Details] 

(2006)  'Oscillation criteria for nonlinear perturbed dynamic equations of second order on time scales'
Agarwal, R.P., Saker, S.H. (2006) 'Oscillation criteria for nonlinear perturbed dynamic equations of second order on time scales'. Journal of Applied Mathematics and Computing, 20 :133147 [Details] 

(2006)  'Fixed points of compact Kakutani maps with antipodal boundary conditions'
O'Regan, D,Peran, J (2006) 'Fixed points of compact Kakutani maps with antipodal boundary conditions'. Proceedings Of The American Mathematical Society, 134 :825830 [Details] 

(2006)  'A positive solution for singular discrete boundary value problems with sign changing nonlinearities'
L¨u, H., Agarwal, R.P. (2006) 'A positive solution for singular discrete boundary value problems with sign changing nonlinearities'. Journal of Applied Mathematics and Stochastic Analysis, 46287 [Details] 

(2006)  'Some nonoscillation criteria for inclusions'
Agarwal, RP,Grace, SR,O'Regan, D (2006) 'Some nonoscillation criteria for inclusions'. Journal Of The Australian Mathematical Society, 80 :112 [Details] 

(2006)  'Positive solutions of singular sublinear second order three point boundary value problems'
Ma, R. (2006) 'Positive solutions of singular sublinear second order three point boundary value problems'. Fixed Point Theory, 7 :6581 [Details] 

(2006)  'Positive solutions for a class of Volterra integral equations via a fixed point theorem in Frechet spaces'
Agarwal, RP,O'Regan, D (2006) 'Positive solutions for a class of Volterra integral equations via a fixed point theorem in Frechet spaces'. Topological Methods In Nonlinear Analysis, 28 :189198 [Details] 

(2006)  'Nodal solutions for secondorder mpoint boundary value problems with nonlinearities across several eigenvalues'
Ma, RY,O'Regan, D (2006) 'Nodal solutions for secondorder mpoint boundary value problems with nonlinearities across several eigenvalues'. Nonlinear AnalysisTheory Methods & Applications, 64 :15621577 [DOI] [Details] 

(2006)  'LeggettWilliams normtype theorems for coincidences'
O'Regan, D,Zima, M (2006) 'LeggettWilliams normtype theorems for coincidences'. Archiv Der Mathematik, 87 :233244 [DOI] [Details] 

(2006)  'SOLUTIONS FOR NONLINEAR NEUMANN PROBLEMS VIA DEGREE THEORY FOR MULTIVALUED PERTURBATIONS OF (S)(+) MAPS'
Agarwal, RP,Filippakis, ME,O'Regan, D,Papageorgiou, NS (2006) 'SOLUTIONS FOR NONLINEAR NEUMANN PROBLEMS VIA DEGREE THEORY FOR MULTIVALUED PERTURBATIONS OF (S)(+) MAPS'. Advances In Differential Equations, 11 :961980 [Details] 

(2006)  'The existence of positive solutions to a nonlocal singular boundary value problem'
O'Regan, D,Stanek, S (2006) 'The existence of positive solutions to a nonlocal singular boundary value problem'. Mathematical Methods In The Applied Sciences, 29 :235247 [DOI] [Details] 

(2006)  'General existence principles for nonlocal boundary value problems with philaplacian and their applications'
Agarwal, RP,O'Regan, D,Stanek, S (2006) 'General existence principles for nonlocal boundary value problems with philaplacian and their applications'. Abstract And Applied Analysis, [DOI] [Details] 

(2006)  'Existence and quasilinearization methods in Hilbert spaces'
ElGebeily, M,O'Regan, D (2006) 'Existence and quasilinearization methods in Hilbert spaces'. Journal Of Mathematical Analysis And Applications, 324 :344357 [DOI] [Details] 

(2006)  'On constantsign periodic solutions in modelling the spread of interdependent epidemics'
Agarwal, RP,O'Regan, D,Wong, PJY (2006) 'On constantsign periodic solutions in modelling the spread of interdependent epidemics'. Anziam Journal, 47 :309332 [Details] 

(2006)  'On a singular boundary value problem for the differential equation f (t, x, x ', x '')=0 using barrier strips'
Kelevedjiev, PS,O'Regan, D,Popivanov, NI (2006) 'On a singular boundary value problem for the differential equation f (t, x, x ', x '')=0 using barrier strips'. Nonlinear AnalysisTheory Methods & Applications, 65 :13481361 [DOI] [Details] 

(2006)  'Existence and multiplicity of positive solutions for singular semipositone pLaplacian equations'
Agarwal, RP,Cao, DM,Lu, HS,O'Regan, D (2006) 'Existence and multiplicity of positive solutions for singular semipositone pLaplacian equations'. Canadian Journal Of MathematicsJournal Canadien De Mathematiques, 58 :449475 [Details] 

(2006)  'Existence principles and a upper and lower solution theory for the onedimension pLaplacian singular boundary value problem with sign changing nonlinearities'
Agarwal, RP,Gao, H,Jiang, D,O'Regan, D,Zhang, X (2006) 'Existence principles and a upper and lower solution theory for the onedimension pLaplacian singular boundary value problem with sign changing nonlinearities'. Dynamic Systems And Applications, 15 :319 [Details] 

(2006)  'Existence and multiplicity of solutions for some threepoint nonlinear boundary value problems'
Xian, X,O'Regan, D (2006) 'Existence and multiplicity of solutions for some threepoint nonlinear boundary value problems'. Journal Of Inequalities And Applications, [DOI] [Details] 

(2006)  'A new approach to boundary value problems on the half line using weaklystrongly sequentially continuous maps'
Agarwal, RP,O'Regan, D,Stanek, S (2006) 'A new approach to boundary value problems on the half line using weaklystrongly sequentially continuous maps'. Topological Methods In Nonlinear Analysis, 27 :399405 [Details] 

(2006)  'A generalized quasilinearization method for secondorder nonlinear differential equations with nonlinear boundary conditions'
ElGebeily, M,O'Regan, D (2006) 'A generalized quasilinearization method for secondorder nonlinear differential equations with nonlinear boundary conditions'. Journal Of Computational And Applied Mathematics, 192 :270281 [DOI] [Details] 

(2006)  'Positive periodic solutions of systems of second order ordinary differential equations'
O'Regan, D,Wang, HY (2006) 'Positive periodic solutions of systems of second order ordinary differential equations'. Positivity, 10 :285298 [DOI] [Details] 

(2006)  'The generalized ThomasFermi singular boundary value problems for neutral atoms'
Agarwal, RP,O'Regan, D,Palamides, PK (2006) 'The generalized ThomasFermi singular boundary value problems for neutral atoms'. Mathematical Methods In The Applied Sciences, 29 :4966 [Details] 

(2006)  'On the solvability of a singular initial value problem x '=f (t,x,x ') using barrier strips'
Kelevedjiev, PS,O'Regan, D (2006) 'On the solvability of a singular initial value problem x '=f (t,x,x ') using barrier strips'. Nonlinear AnalysisTheory Methods & Applications, 64 :726738 [DOI] [Details] 

(2006)  'LeraySchauder and Krasnoselskii results for multivalued maps defined on pseudoopen subsets of a Frechet space'
Agarwal, RP,O'Regan, D (2006) 'LeraySchauder and Krasnoselskii results for multivalued maps defined on pseudoopen subsets of a Frechet space'. Applied Mathematics Letters, 19 :13271334 [DOI] [Details] 

(2006)  'An upper and lower solution theory for the problem (G'(y))' plus f (t, y)=0 on finite and infinite intervals'
Agarwal, RP,O'Regan, D,Stanek, S (2006) 'An upper and lower solution theory for the problem (G'(y))' plus f (t, y)=0 on finite and infinite intervals'. Acta Mathematica SinicaEnglish Series, 22 :827832 [DOI] [Details] 

(2006)  'Constantsign solutions of systems of higher order boundary value problems with integrable singularities'
Agarwal, RP,O'Regan, D,Wong, PJY (2006) 'Constantsign solutions of systems of higher order boundary value problems with integrable singularities'. Mathematical And Computer Modelling, 44 :9831008 [DOI] [Details] 

(2005)  'Neumann boundary value problems with singularities in a phase variable'
Agarwal, R.P.; Stanˇek, S. (2005) 'Neumann boundary value problems with singularities in a phase variable'. Aequationes Mathematicae, 69 :293308 [Details] 

(2005)  'Constantsign periodic and almost periodic solutions of a system of difference equations'
Agrawal, PR,O'Regan, D,Wong, PJY (2005) 'Constantsign periodic and almost periodic solutions of a system of difference equations'. Computers & Mathematics With Applications, 50 :17251754 [DOI] [Details] 

(2005)  'Constantsign solutions of a system of integral equations: The semipositone and singular case'
Agarwal, RP,O'Regan, D,Wong, PJY (2005) 'Constantsign solutions of a system of integral equations: The semipositone and singular case'. Asymptotic Analysis, 43 :4774 [Details] 

(2005)  'Multiple positive solutions of singular discrete pLaplacian problems via variational methods'
Agarwal, RP,Perera, K,O'Regan, D (2005) 'Multiple positive solutions of singular discrete pLaplacian problems via variational methods'. Advances In Difference Equations, :9399 [DOI] [Details] 

(2005)  'Fixed point theory for composite maps on almost dominating extension spaces'
Agarwal, RP,Kim, JK,O'Regan, D (2005) 'Fixed point theory for composite maps on almost dominating extension spaces'. Proceedings Of The Indian Academy Of SciencesMathematical Sciences, 115 :339345 [Details] 

(2005)  'A generalized upper and lower solution method for singular discrete boundary value problems for the onedimensional pLaplacian'
Jiang, D., Agarwal, R.P. (2005) 'A generalized upper and lower solution method for singular discrete boundary value problems for the onedimensional pLaplacian'. Journal of Applied Analysis, 11 :3547 [Details] 

(2005)  'A Krasnoselskii cone compression result for multimaps in the SKKM class'
Shahzad, N., Agarwal, R.P. (2005) 'A Krasnoselskii cone compression result for multimaps in the SKKM class'. Publications de L'Institut Mathematique (Beograd), 77 (91):7985 [Details] 

(2005)  'Twostep systems for GHrelaxed pseudococoercive nonlinear variational problems based on projection methods'
Agarwal, R.P., Verma, R.U. (2005) 'Twostep systems for GHrelaxed pseudococoercive nonlinear variational problems based on projection methods'. Georgian Mathematical Journal, 12 :110 [Details] 

(2005)  'Singular positone and semipositone boundary value problems of second order delay differential equations'
Jiang, DQ,Xu, XJ,O'Regan, D,Agarwal, RP (2005) 'Singular positone and semipositone boundary value problems of second order delay differential equations'. Czechoslovak Mathematical Journal, 55 :483498 [Details] 

(2005)  'Random fixed point theorems and LeraySchauder alternatives for U_x0014_c maps'
Agarwal, R.P. (2005) 'Random fixed point theorems and LeraySchauder alternatives for U_x0014_c maps'. Communications Korean Mathematical Society, 20 :299310 [Details] 

(2005)  'Oscillation of functional differential equations'
Agarwal, RP,Grace, SR,Kiguradze, I,O'Regan, D (2005) 'Oscillation of functional differential equations'. Mathematical And Computer Modelling, 41 :417461 [DOI] [Details] 

(2005)  'Nonresonant singular boundary value problems with sign changing nonlinearities'
Agarwal, RP,O'Regan, D,Lakshmikantham, V,Leela, S (2005) 'Nonresonant singular boundary value problems with sign changing nonlinearities'. Applied Mathematics And Computation, 167 :12361248 [DOI] [Details] 

(2005)  'Multiplicity of positive solutions to second order differential equations with Neumann boundary conditions'
Chu, J., Jiang, D., Agarwal, R.P. (2005) 'Multiplicity of positive solutions to second order differential equations with Neumann boundary conditions'. Applicationes Mathematicae, 32 :293303 [Details] 

(2005)  'Multiple positive solutions of higher order singular problems by variational methods'
Agarwal, R.P., Perera, K. (2005) 'Multiple positive solutions of higher order singular problems by variational methods'. Differential Equations, 41 :739743 [Details] 

(2005)  'Some fixed point theorems for singlevalued and multivalued countably condensing weakly uniform isotone mappings'
Turkoglu, D., Agarwal, R.P., Altun, I. (2005) 'Some fixed point theorems for singlevalued and multivalued countably condensing weakly uniform isotone mappings'. PanAmerican Mathematical Journal, 15 :5768 [Details] 

(2005)  'Nonuniform nonresonance at the first eigenvalue of the onedimensional singular pLaplacian'
L¨u, H., Agarwal, R.P. (2005) 'Nonuniform nonresonance at the first eigenvalue of the onedimensional singular pLaplacian'. Memoirs on Differential Equations and Mathematical Physics, 34 :97114 [Details] 

(2005)  'Solvability of singular second order mpoint boundary value problems'
Ma, RY,O'Regan, D (2005) 'Solvability of singular second order mpoint boundary value problems'. Journal Of Mathematical Analysis And Applications, 301 :124134 [DOI] [Details] 

(2005)  'Fourthorder problems with nonlinear boundary conditions'
Franco, D,O'Regan, D,Peran, J (2005) 'Fourthorder problems with nonlinear boundary conditions'. Journal Of Computational And Applied Mathematics, 174 :315327 [DOI] [Details] 

(2005)  'Solvability of singular Dirichlet boundaryvalue problems with given maximal values for positive solutions'
Agarwal, RP,O'Regan, D,Stanek, S (2005) 'Solvability of singular Dirichlet boundaryvalue problems with given maximal values for positive solutions'. Proceedings Of The Edinburgh Mathematical Society, 48 :119 [DOI] [Details] 

(2005)  'On nonlinear integral equations and Abounded variation'
Bugajewska, D,O'Regan, D (2005) 'On nonlinear integral equations and Abounded variation'. Acta Mathematica Hungarica, 107 :295306 [Details] 

(2005)  'Upper and lower solutions for the singular pLaplacian with sign changing nonlinearities and nonlinear boundary data'
Lu, HS,O'Regan, D,Agarwal, RP (2005) 'Upper and lower solutions for the singular pLaplacian with sign changing nonlinearities and nonlinear boundary data'. Journal Of Computational And Applied Mathematics, 181 :442466 [DOI] [Details] 

(2005)  'Multiple positive solutions of fourthorder boundary value problems'
Xu, XJ,Jiang, DQ,O'Regan, D,Agarwal, RP (2005) 'Multiple positive solutions of fourthorder boundary value problems'. Mathematical Inequalities & Applications, 8 :7988 [Details] 

(2005)  'Positive solutions for singular pLaplacian equations with sign changing nonlinearities. Using inequality theory'
Lu, HS,O'Regan, D,Agarwal, RP (2005) 'Positive solutions for singular pLaplacian equations with sign changing nonlinearities. Using inequality theory'. Applied Mathematics And Computation, 165 :587597 [DOI] [Details] 

(2005)  'Existence theorems for the onedimensional singular pLaplacian equation with a nonlinear boundary condition'
Lu, HS,O'Regan, D,Agarwal, RP (2005) 'Existence theorems for the onedimensional singular pLaplacian equation with a nonlinear boundary condition'. Journal Of Computational And Applied Mathematics, 182 :188210 [DOI] [Details] 

(2005)  'Positive solutions for the singular plaplace equation'
Agarwal, RP,Lu, HS,O'Regan, D (2005) 'Positive solutions for the singular plaplace equation'. Houston Journal Of Mathematics, 31 :12071220 [Details] 

(2005)  'Compressionexpansion fixed point theorem in two norms and applications'
O'Regan, D,Precup, R (2005) 'Compressionexpansion fixed point theorem in two norms and applications'. Journal Of Mathematical Analysis And Applications, 309 :383391 [DOI] [Details] 

(2005)  'EXISTENCE OF NONNEGATIVE SOLUTIONS FOR NONLINEAR BOUNDARY VALUE PROBLEMS VIA PSEUDOMONOTONE OPERATORS AND NONSMOOTH CRITICAL POINT THEORY'
Agarwal, RP,Filippakis, M,O'Regan, D,Papageorgiou, NS (2005) 'EXISTENCE OF NONNEGATIVE SOLUTIONS FOR NONLINEAR BOUNDARY VALUE PROBLEMS VIA PSEUDOMONOTONE OPERATORS AND NONSMOOTH CRITICAL POINT THEORY'. Journal Of Nonlinear And Convex Analysis, 6 :393417 [Details] 

(2005)  'On the oscillation of certain thirdorder difference equations'
Agarwal, RP,Grace, SR,O'Regan, D (2005) 'On the oscillation of certain thirdorder difference equations'. Advances In Difference Equations, :345367 [DOI] [Details] 

(2005)  'A LeraySchauder alternative for weaklystrongly sequentially continuous weakly compact maps'
Agarwal, RP,O'Regan, D,Liu, XZ (2005) 'A LeraySchauder alternative for weaklystrongly sequentially continuous weakly compact maps'. Fixed Point Theory And Applications, :110 [DOI] [Details] 

(2005)  'Upper and lower solutions for the singular pLaplacian with sign changing nonlinearities via inequality theory'
Lu, HS,O'Regan, D,Agarwal, RP (2005) 'Upper and lower solutions for the singular pLaplacian with sign changing nonlinearities via inequality theory'. Glasgow Mathematical Journal, 47 :439460 [DOI] [Details] 

(2005)  'Constantsign periodic and almost periodic solutions for a system of integral equations'
Agarwal, RP,O'Regan, D,Wong, PJY (2005) 'Constantsign periodic and almost periodic solutions for a system of integral equations'. Acta Applicandae Mathematicae, 89 :177216 [DOI] [Details] 

(2005)  'Invariant approximations for generalized Icontractions'
O'Regan, D,Shahzad, N (2005) 'Invariant approximations for generalized Icontractions'. Numerical Functional Analysis And Optimization, 26 :565575 [DOI] [Details] 

(2005)  'Positive solutions of higherorder singular problems'
Agarwal, RP,Perera, K,O'Regan, D (2005) 'Positive solutions of higherorder singular problems'. Differential Equations, 41 :739743 [Details] 

(2005)  'Positive solutions of singular integral equations  A survey'
Agarwal, RP,Meehan, M,O'Regan, D (2005) 'Positive solutions of singular integral equations  A survey'. Dynamic Systems And Applications, 14 :137 [Details] 

(2005)  'A new approach to elliptic equations using a LeraySchauder alternative for a subclass of weakly sequentially continuous maps'
Agarwal, RP,O'Regan, D,Liu, XZ (2005) 'A new approach to elliptic equations using a LeraySchauder alternative for a subclass of weakly sequentially continuous maps'. Dynamics Of Continuous Discrete And Impulsive SystemsSeries AMathematical Analysis, 12 :297301 [Details] 

(2005)  'VolterraStieltjes integral operators'
Banas, J,O'Regan, D (2005) 'VolterraStieltjes integral operators'. Mathematical And Computer Modelling, 41 :335344 [DOI] [Details] 

(2005)  'Twin positive periodic solutions of second order singular differential systems'
Lin, XN,Jiang, DQ,O'Regan, D,Agarwal, RP (2005) 'Twin positive periodic solutions of second order singular differential systems'. Topological Methods In Nonlinear Analysis, 25 :263273 [Details] 

(2005)  'Optimal existence theory for single and multiple positive periodic solutions to functional difference equations'
Jiang, DQ,O'Regan, D,Agarwal, RP (2005) 'Optimal existence theory for single and multiple positive periodic solutions to functional difference equations'. Applied Mathematics And Computation, 161 :441462 [DOI] [Details] 

(2005)  'On the existence of positive solutions for singular thirdorder boundary value problems'
Sun, Y., Cho, Y.J. (2005) 'On the existence of positive solutions for singular thirdorder boundary value problems'. International Journal of Evolution Equations, 1 :403413 [Details] 

(2005)  'Existence theory for nonlinear operator equations of Hammerstein type in Banach spaces'
O'Regan, D,Precup, R (2005) 'Existence theory for nonlinear operator equations of Hammerstein type in Banach spaces'. Dynamic Systems And Applications, 14 :121134 [Details] 

(2005)  'Existence results for first and second order semilinear impulsive differential inclusions'
Gorniewicz, L,Ntouyas, SIK,O'Regan, D (2005) 'Existence results for first and second order semilinear impulsive differential inclusions'. Topological Methods In Nonlinear Analysis, 26 :135162 [Details] 

(2005)  'Existence of constantsign solutions to a system of difference equations: the semipositone and singular case'
Agarwal, RP,O'Regan, D,Wong, PJY (2005) 'Existence of constantsign solutions to a system of difference equations: the semipositone and singular case'. Journal Of Difference Equations And Applications, 11 :151171 [DOI] [Details] 

(2005)  'Construction of upper and lower solutions with applications to singular boundary value problems'
Agarwal, RP,O'Regan, D,Precup, R (2005) 'Construction of upper and lower solutions with applications to singular boundary value problems'. Journal Of Computational Analysis And Applications, 7 :205221 [Details] 

(2005)  'Common fixed point and invariant approximation results on nonstarshaped domains'
Hussain, N., Agarwal, R.P. (2005) 'Common fixed point and invariant approximation results on nonstarshaped domains'. Georgian Mathematical Journal, 12 :659669 [Details] 

(2005)  'A LeraySchauder alternative for weaklystrongly sequentially continuous weakly compact maps'
Agarwal, R.P., Liu, X. (2005) 'A LeraySchauder alternative for weaklystrongly sequentially continuous weakly compact maps'. Fixed Point Theory and Applications, 1 :110 [Details] 

(2005)  'Viability theory and fuzzy differential equations'
Agarwal, RP,O'Regan, D,Lakshmikantham, V (2005) 'Viability theory and fuzzy differential equations'. Fuzzy Sets And Systems, 151 :563580 [DOI] [Details] 

(2005)  'Auxiliary principle and fuzzy variationallike inequalities'
Chang, SS,O'Regan, D,Tan, KK,Zeng, LC (2005) 'Auxiliary principle and fuzzy variationallike inequalities'. Journal Of Inequalities And Applications, :479494 [DOI] [Details] 

(2005)  'A note on the topological transversality theorem for acyclic maps'
Agarwal, RP,O'Regan, D (2005) 'A note on the topological transversality theorem for acyclic maps'. Applied Mathematics Letters, 18 :1722 [DOI] [Details] 

(2005)  'Singular boundary value problems for first and second order impulsive differential equations'
Agarwal, R.P., Franco, D. (2005) 'Singular boundary value problems for first and second order impulsive differential equations'. Aequationes Mathematicae, 69 :8396 [Details] 

(2005)  'On perturbations of accretive mappings'
Chen, YQ,Cho, YJ,O'Regan, D (2005) 'On perturbations of accretive mappings'. Applied Mathematics Letters, 18 :775781 [DOI] [Details] 

(2005)  'On generalized multivalued nonlinear variationallike inclusions with fuzzy mappings'
Agarwal, R.P., Khan, M.F., Salahuddin (2005) 'On generalized multivalued nonlinear variationallike inclusions with fuzzy mappings'. Advances in Nonlinear Variational Inequalities, 8 :4155 [Details] 

(2005)  'Fixed point theory for M¨onch type maps defined on closed subsets of Fr´echet spaces: the projective limit approach'
Agarwal, R.P., Dshalalow, J.H. (2005) 'Fixed point theory for M¨onch type maps defined on closed subsets of Fr´echet spaces: the projective limit approach'. International Journal of Mathematics and Mathematical Sciences, 17 :27752782 [Details] 

(2005)  'Measures of weak compactness and fixed point theory'
Barroso, C.S. (2005) 'Measures of weak compactness and fixed point theory'. Fixed Point Theory, 6 :247255 [Details] 

(2005)  'Positive periodic solutions of systems of first order ordinary differential equations'
Wang, H. (2005) 'Positive periodic solutions of systems of first order ordinary differential equations'. Results in Mathematics, 48 :310325 [Details] 

(2005)  'Positive solvability of systems of nonlinear Hammerstein integral equations'
Yang, ZL,O'Regan, D (2005) 'Positive solvability of systems of nonlinear Hammerstein integral equations'. Journal Of Mathematical Analysis And Applications, 311 :600614 [DOI] [Details] 

(2005)  'Quasivariational and minimax inequalities and collectively fixed points results for SKKM maps'
Agarwal, R.P., Shahzad, N. (2005) 'Quasivariational and minimax inequalities and collectively fixed points results for SKKM maps'. Bulletin Korean Mathematical Society, 42 :739756 [Details] 

(2005)  'Random approximation and random fixed point theory for random nonself maps'
Shahzad, N. (2005) 'Random approximation and random fixed point theory for random nonself maps'. New Zealand J. Math, 34 :103123 [Details] 

(2005)  'A monotone method for fourth order periodic boundary value problems and periodic solutions of functional differential equations'
Zuo, W., Jiang, D., Agarwal, R.P. (2005) 'A monotone method for fourth order periodic boundary value problems and periodic solutions of functional differential equations'. Methods and Applications of Analysis, 12 :1928 [Details] 

(2005)  'A multiplicity result for second order impulsive differential equations via the Leggett Williams fixed point theorem'
Agarwal, RP,O'Regan, D (2005) 'A multiplicity result for second order impulsive differential equations via the Leggett Williams fixed point theorem'. Applied Mathematics And Computation, 161 :433439 [DOI] [Details] 

(2005)  'Fuzzy solutions for multipoint boundary value problems'
Agarwal, R.P., Benchohra, M., Ouahab, A. (2005) 'Fuzzy solutions for multipoint boundary value problems'. Memoirs on Differential Equations and Mathematical Physics, 35 :114 [Details] 

(2005)  'A note on upper and lower solutions for first order inclusions of upper semicontinuous or lower semicontinuous type'
Agarwal, R.P., Frigon, M., Lakshmikantham, V. (2005) 'A note on upper and lower solutions for first order inclusions of upper semicontinuous or lower semicontinuous type'. Nonlinear Studies, 12 :159163 [Details] 

(2005)  'Admissible spaces and _x000B_fixed points'
O'REGAN, D. (2005) 'Admissible spaces and _x000B_fixed points'. Nonlinear Functional Analysis and Applications, 10 :5564 [Details] 

(2005)  'Integral operators of UrysohnStieltjes type'
Bana´s, J. (2005) 'Integral operators of UrysohnStieltjes type'. Periodica Mathematica Hungarica, 51 :114 [Details] 

(2005)  'Antiperiodic solutions for evolution equations with mappings in the class (S+)'
Chen, YQ,Cho, YJ,O'Regan, D (2005) 'Antiperiodic solutions for evolution equations with mappings in the class (S+)'. Mathematische Nachrichten, 278 :356362 [DOI] [Details] 

(2005)  'Existence of positive solutions for nonlinear boundary value problems via pseudomonotone operators and nonsmooth critical point theory'
Agarwal, R.P., Filippakis, M., Papageorgiou, N.S. (2005) 'Existence of positive solutions for nonlinear boundary value problems via pseudomonotone operators and nonsmooth critical point theory'. Journal of Nonlinear and Convex Analysis, 6 :393417 [Details] 

(2005)  'The antipodal mapping theorem and difference equations in Banach spaces'
Franco, D,O'Regan, D,Peran, J (2005) 'The antipodal mapping theorem and difference equations in Banach spaces'. Journal Of Difference Equations And Applications, 11 :10371047 [DOI] [Details] 

(2005)  'Maximal solutions and existence theory for fuzzy differential and integral equations'
Agarwal, R.P., Lakshmikantham, V. (2005) 'Maximal solutions and existence theory for fuzzy differential and integral equations'. Journal of Applied Analysis, 11 :171186 [Details] 

(2005)  'Homotopy and normalization properties for admissible maps'
Agarwala, RP,O'Regan, D (2005) 'Homotopy and normalization properties for admissible maps'. Applied Mathematics Letters, 18 :3340 [DOI] [Details] 

(2005)  'Controllability of semilinear differential equations and inclusions via semigroup theory in Banach spaces'
Gorniewicz, L,Ntouyas, SK,O'Regan, D (2005) 'Controllability of semilinear differential equations and inclusions via semigroup theory in Banach spaces'. Reports On Mathematical Physics, 56 :437470 [Details] 

(2005)  'Construction of upper and lower solutions for singular discrete initial and boundary value problems via inequality theory'
Lu, HS,O'Regan, D (2005) 'Construction of upper and lower solutions for singular discrete initial and boundary value problems via inequality theory'. Advances In Difference Equations, :205214 [DOI] [Details] 

(2005)  'Constant sign periodic and almost periodic solutions for a system of integral equations'
Agarwal, R.P., Wong, P.J.Y (2005) 'Constant sign periodic and almost periodic solutions for a system of integral equations'. Acta Applicandae Mathematicae, 89 :177216 [Details] 

(2005)  'Boundary value problems arising in the percolation of water from a cylindrical reservoir into the surrounding soil'
Agarwal, RP,O'Regan, D,Precup, R (2005) 'Boundary value problems arising in the percolation of water from a cylindrical reservoir into the surrounding soil'. Nonlinear AnalysisReal World Applications, 6 :123131 [DOI] [Details] 

(2005)  'A note on the Lefschetz fixed point theorem for admissible spaces'
Agarwal, R.P. (2005) 'A note on the Lefschetz fixed point theorem for admissible spaces'. Bulletin Korean Mathematical Society, 42 :307313 [Details] 

(2005)  'LeraySchauder principles for inward Kakutani M¨onch type maps'
Agarwal, R.P., Dshalalow, J.H. (2005) 'LeraySchauder principles for inward Kakutani M¨onch type maps'. Nonlinear Functional Analysis and Applications, 10 :325330 [Details] 

(2005)  'On monotonic solutions of some integral equations'
Caballero, J., Sadarangani, K.B. (2005) 'On monotonic solutions of some integral equations'. Archivum Mathematicum (Brno), 41 :325338 [Details] 

(2005)  'On positive fixed points of countably condensing mappings'
Chen, YQ,Cho, YJ,O'Regan, D (2005) 'On positive fixed points of countably condensing mappings'. Dynamics Of Continuous Discrete And Impulsive SystemsSeries AMathematical Analysis, 12 :519527 [Details] 

(2005)  'On the existence of multiple periodic solutions for the vector pLaplacian via critical point theory'
L¨u, H., Agarwal, R.P. (2005) 'On the existence of multiple periodic solutions for the vector pLaplacian via critical point theory'. Applications of Mathematics, 50 :555568 [Details] 

(2005)  'On the number of positive periodic solutions of functional differential equations and population models'
Jiang, DQ,O'Regan, D,Agarwal, RP,Xu, XJ (2005) 'On the number of positive periodic solutions of functional differential equations and population models'. Mathematical Models & Methods In Applied Sciences, 15 :555573 [Details] 

(2005)  'On the oscillation of certain advanced functional differential equations using comparison methods'
Agarwal, R.P., Grace, S.R., Kiguradze, I. (2005) 'On the oscillation of certain advanced functional differential equations using comparison methods'. Fasciculi Mathematici, 35 :522 [Details] 

(2005)  'On the oscillation of higher order difference equations'
Agarwal, R.P., Grace, S.R. (2005) 'On the oscillation of higher order difference equations'. Soochow J. Math, 31 :245259 [Details] 

(2004)  'Linearization of secondorder superlinear oscillation theorems'
Agarwal, RP,Grace, SR,O'Regan, D (2004) 'Linearization of secondorder superlinear oscillation theorems'. Mathematical And Computer Modelling, 39 :11651183 [DOI] [Details] 

(2004)  'On constantsign solutions of a system of discrete equations'
Agarwal, R.P., Wong, P.J.Y. (2004) 'On constantsign solutions of a system of discrete equations'. Journal Of Applied Mathematics And Computing, 14 :137 [Details] 

(2004)  'Oscillation criteria for secondorder nonlinear neutral delay dynamic equations'
Agarwal, RP,O'Regan, D,Saker, SH (2004) 'Oscillation criteria for secondorder nonlinear neutral delay dynamic equations'. Journal Of Mathematical Analysis And Applications, 300 :203217 [DOI] [Details] 

(2004)  'Positive solutions for continuous and discrete boundary value problems to the onedimension pLaplacian'
Jiang, DQ,Chu, JF,O'Regan, D,Agarwal, RP (2004) 'Positive solutions for continuous and discrete boundary value problems to the onedimension pLaplacian'. Mathematical Inequalities & Applications, 7 :523534 [Details] 

(2004)  'Viable solutions of differential inclusions on closed sets'
Agarwal, R.P. (2004) 'Viable solutions of differential inclusions on closed sets'. Applicable Analysis, 83 :10271036 [Details] 

(2004)  'Semipositone Dirichlet boundary value problems with singular dependent nonlinearities'
Agarwal, RP,O'Regan, D (2004) 'Semipositone Dirichlet boundary value problems with singular dependent nonlinearities'. Houston Journal Of Mathematics, 30 :297308 [Details] 

(2004)  'Singular boundary value problems with integrable singularities'
Agarwal, R. P.; O'Regan, Donal (2004) 'Singular boundary value problems with integrable singularities'. Miskolc Mathematical Notes, 5 :119127 [Details] 

(2004)  'Semipositone higherorder differential equations'
Agarwal, RP,Grace, SR,O'Regan, D (2004) 'Semipositone higherorder differential equations'. Applied Mathematics Letters, 17 :201207 [DOI] [Details] 

(2004)  'Existence of positive solutions for boundaryvalue problems with singularities in phase variables'
Agarwal, RP,O'Regan, D,Stanek, S (2004) 'Existence of positive solutions for boundaryvalue problems with singularities in phase variables'. Proceedings Of The Edinburgh Mathematical Society, 47 :113 [DOI] [Details] 

(2004)  'Optimal existence conditions for second order periodic solutions of delay differential equations with upper and lower solutions in the reverse order'
Jiang, DQ,Zuo, WJ,O'Regan, D,Agarwal, RP (2004) 'Optimal existence conditions for second order periodic solutions of delay differential equations with upper and lower solutions in the reverse order'. International Journal Of Computer Mathematics, 81 :707717 [DOI] [Details] 

(2004)  'Fredholm and Volterra integral equations with integrable singularities'
Agarwal, R.P. (2004) 'Fredholm and Volterra integral equations with integrable singularities'. Hokkaido Math. Journal, 33 :443456 [Details] 

(2004)  'Aronszajn type results for Volterra equations and inclusions'
Agarwal, R.P., Gorniewicz, L. (2004) 'Aronszajn type results for Volterra equations and inclusions'. Topological Methods in Nonlinear Analysis, 23 :149159 [Details] 

(2004)  'An infinite interval problem arising in circularly symmetric deformations of shallow membrane caps'
Agarwal, RP,O'Regan, D (2004) 'An infinite interval problem arising in circularly symmetric deformations of shallow membrane caps'. International Journal Of NonLinear Mechanics, 39 :779784 [DOI] [Details] 

(2004)  'A FuriPera theorem in Hausdorff topological spaces for acyclic maps'
Agarwal, R.P., Dshalalow, J.H. (2004) 'A FuriPera theorem in Hausdorff topological spaces for acyclic maps'. International Journal of Mathematics and Mathematical Sciences, 47 :24832488 [Details] 

(2004)  'On nondecreasing solutions of cubic integral equations of Urysohn type'
Caballero, J., Sadarangani, K.B. (2004) 'On nondecreasing solutions of cubic integral equations of Urysohn type'. Commentationes Mathematicae (Prace Matematyczne), 44 :3953 [Details] 

(2004)  'Linearization of second order sublinear oscillation theorems'
Agarwal, R.P., Grace, S.R. (2004) 'Linearization of second order sublinear oscillation theorems'. Communications in Applied Analysis, 8 :219235 [Details] 

(2004)  'Generalized modulated random measures and their potentials'
Agarwal, R,Dshalalow, JH,O'Regan, D (2004) 'Generalized modulated random measures and their potentials'. Stochastic Analysis And Applications, 22 :971988 [DOI] [Details] 

(2004)  'Fixed point theory for multimaps defined on admissible subsets of topological vector spaces'
Agarwal, R.P. (2004) 'Fixed point theory for multimaps defined on admissible subsets of topological vector spaces'. Commentationes Mathematicae (Prace Matematyczne), 44 :110 [Details] 

(2004)  'Fixed point and homotopy results in uniform spaces'
O'Regan, D,Agarwal, RP,Jiang, DQ (2004) 'Fixed point and homotopy results in uniform spaces'. Bulletin Of The Belgian Mathematical SocietySimon Stevin, 11 :289296 [Details] 

(2004)  'Analytic solutions to integral equations in the complex domain'
Agarwal, R.P. (2004) 'Analytic solutions to integral equations in the complex domain'. Complex Variables, Theory and Applications, 49 :145153 [Details] 

(2004)  'Positive solutions of nonlocal singular boundary value problems'
Agarwal, RP,O'Regan, D,Stanek, S (2004) 'Positive solutions of nonlocal singular boundary value problems'. Glasgow Mathematical Journal, 46 :537550 [DOI] [Details] 

(2004)  'Linearization and higher order nonlinear oscillation theorems using comparison methods'
Agarwal, R.P., Grace, S.R. (2004) 'Linearization and higher order nonlinear oscillation theorems using comparison methods'. Georgian Math. Journal, 11 :726 [Details] 

(2004)  'Fuzzy Volterra integral equations: a stacking theorem approach'
Agarwal, R.P., Lakshmikantham, V. (2004) 'Fuzzy Volterra integral equations: a stacking theorem approach'. Applicable Analysis, 83 :521532 [Details] 

(2004)  'Positive solutions for Dirichlet problems of singular quasilinear elliptic equations via variational methods'
Agarwal, RP,Lu, HS,O'Regan, D (2004) 'Positive solutions for Dirichlet problems of singular quasilinear elliptic equations via variational methods'. Mathematika, 51 :187202 [Details] 

(2004)  'Random observations of marked Cox processes. Time insensitive functionals'
Agarwal, RP,Dshalalow, JH,O'Regan, D (2004) 'Random observations of marked Cox processes. Time insensitive functionals'. Journal Of Mathematical Analysis And Applications, 293 :113 [DOI] [Details] 

(2004)  'A singular initial value problem for some functional differential equations'
Agarwal, R.P., Zernov, O. (2004) 'A singular initial value problem for some functional differential equations'. Jour. Applied Mathematics and Stochastic Analysis, 3 :261270 [Details] 

(2004)  'A survey of recent results for initial and boundary value problems singular in the dependent variable'
Agarwal, R.P. (2004) 'A survey of recent results for initial and boundary value problems singular in the dependent variable'. Handbook of Differential Equations: Ordinary Differential Equations, 1 :168 [Details] 

(2004)  'Homotopy and LeraySchauder type results for admissible inward multimaps'
O'REGAN, D. (2004) 'Homotopy and LeraySchauder type results for admissible inward multimaps'. Journal of Concrete and Applicable Mathematics, 2 :6776 [Details] 

(2004)  'Existence principles for strong solutions to elliptic Dirichlet inclusions'
O'REGAN, D. (2004) 'Existence principles for strong solutions to elliptic Dirichlet inclusions'. Nonlinear Analysis Forum, 9 :201207 [Details] 

(2004)  'Existence of solutions for first order ordinary differential equations with nonlinear boundary conditions'
Franco, D,Nieto, JJ,O'Regan, D (2004) 'Existence of solutions for first order ordinary differential equations with nonlinear boundary conditions'. Applied Mathematics And Computation, 153 :793802 [DOI] [Details] 

(2004)  'Constantsign Lp solutions for a system of integral equations'
Agarwal, R.P., Wong, P.J.Y. (2004) 'Constantsign Lp solutions for a system of integral equations'. Results in Mathematics, 46 :195219 [Details] 

(2004)  'Conjugate singular and nonsingular discrete boundary value problems'
Agarwal, R.P. (2004) 'Conjugate singular and nonsingular discrete boundary value problems'. Proceedings of the Sixth International Conference on Difference Equations, :337348 [Details] 

(2004)  'Approximation and FuriPera type theorems for the SKKM class'
Shahzad, N., Agarwal, R.P. (2004) 'Approximation and FuriPera type theorems for the SKKM class'. Vietnam Journal of Mathematics, 32 :451466 [Details] 

(2004)  'Three solutions of constant sign for a system of discrete equations'
Agarwal, RP,O'Regan, D,Wong, PJY (2004) 'Three solutions of constant sign for a system of discrete equations'. Acta Applicandae Mathematicae, 84 :121162 [Details] 

(2004)  'Multiple positive solutions to semipositone Dirichlet boundary value problems with singular dependent nonlinearities'
Jiang, D., Xu, X., Agarwal, R.P. (2004) 'Multiple positive solutions to semipositone Dirichlet boundary value problems with singular dependent nonlinearities'. Fasciculi Mathematici, 34 :2537 [Details] 

(2004)  'Eigenvalue characterization of a system of difference equations'
Agarwal, R.P., Wong, P.J.Y. (2004) 'Eigenvalue characterization of a system of difference equations'. Nonlinear Oscillations, 7 :347 [Details] 

(2004)  'Asymptotic behavior of generalized nonexpansive sequences and mean points'
Pathak, H.K., Khan, M.S., Agarwal, R.P. (2004) 'Asymptotic behavior of generalized nonexpansive sequences and mean points'. Georgian Mathematical Jour, 11 :539548 [Details] 

(2004)  'A note on LeraySchauder alternatives for the decomposable maps of Bader'
O'REGAN, D. (2004) 'A note on LeraySchauder alternatives for the decomposable maps of Bader'. Fixed Point Theory, 5 :97102 [Details] 

(2004)  'On discontinuous functional Volterra integral equations and impulsive differential equations in abstract spaces'
Heikkila, S,O'Regan, D (2004) 'On discontinuous functional Volterra integral equations and impulsive differential equations in abstract spaces'. Glasgow Mathematical Journal, 46 :529536 [DOI] [Details] 

(2004)  'Eigenvalues of a system of Fredholm integral equations'
Agarwal, RP,O'Regan, D,Wong, PJY (2004) 'Eigenvalues of a system of Fredholm integral equations'. Mathematical And Computer Modelling, 39 :11131150 [DOI] [Details] 

(2004)  'Essential U_x0014_c type maps and BirkhoffKellogg theorems'
Agarwal, R.P. (2004) 'Essential U_x0014_c type maps and BirkhoffKellogg theorems'. Jour. Applied Mathematics and Stochastic Analysis, 1 :18 [Details] 

(2004)  'On solutions of an integral equation related to traffic flow on unbounded domains'
Caballero, J,Sadarangani, K,O'Regan, D (2004) 'On solutions of an integral equation related to traffic flow on unbounded domains'. Archiv Der Mathematik, 82 :551563 [DOI] [Details] 

(2004)  'Operator approximating sequences and fixed points'
Agarwal, R.P., Verma, R.U. (2004) 'Operator approximating sequences and fixed points'. Communications on Applied Nonlinear Analysis, 11 (2):5867 [Details] 

(2004)  'Oscillation of higher order difference equations via comparison'
Agarwal, R.P., Grace, S.R. (2004) 'Oscillation of higher order difference equations via comparison'. Glasnik Matemati?cki, 39 :287299 [Details] 

(2004)  'Common fixed point theory for multivalued contractive maps of Reich type'
O'REGAN, D., Agarwal, R.P., Papageorgiou, N.S. (2004) 'Common fixed point theory for multivalued contractive maps of Reich type'. Applicable Analysis, 83 :3747 [Details] 

(2004)  'Constantsign solutions of a system of Fredholm integral equations'
Agarwal, RP,O'Regan, D,Wong, PJY (2004) 'Constantsign solutions of a system of Fredholm integral equations'. Acta Applicandae Mathematicae, 80 :5794 [Details] 

(2004)  'Coincidence theory for Ukc maps and inequalities'
Agarwal, R.P. (2004) 'Coincidence theory for Ukc maps and inequalities'. Journal of Nonlinear and Convex Analysis, 5 :265274 [Details] 

(2004)  'Multiple positive solutions of singular and nonsingular discrete problems via variational methods'
Agarwal, RP,Perera, K,O'Regan, D (2004) 'Multiple positive solutions of singular and nonsingular discrete problems via variational methods'. Nonlinear AnalysisTheory Methods & Applications, 58 :6973 [DOI] [Details] 

(2004)  'A generalized upper and lower solution method for singular discrete initial value problems'
Agarwal, R.P., Jiang, D. (2004) 'A generalized upper and lower solution method for singular discrete initial value problems'. Demonstratio Mathematica, 37 [Details] 

(2004)  'Upper and lower solution theory for first and second order difference equations'
Franco, D., Per´an, J. (2004) 'Upper and lower solution theory for first and second order difference equations'. Dynamic Systems and Applications, 13 :273282 [Details] 

(2004)  'Triple solutions of constant sign for a system of Fredholm integral equations'
Agarwal, R.P., Wong, P.J.Y. (2004) 'Triple solutions of constant sign for a system of Fredholm integral equations'. Cubo Journal, 6 (3):145 [Details] 

(2004)  'Time sensitive functionals of marked Cox processes'
Agarwal, RP,Dshalalow, JH,O'Regan, D (2004) 'Time sensitive functionals of marked Cox processes'. Journal Of Mathematical Analysis And Applications, 293 :1427 [DOI] [Details] 

(2004)  'Second order impulsive dynamic equations on time scales'
Agarwal, R.P., Benchohra, M., Ouahab, A. (2004) 'Second order impulsive dynamic equations on time scales'. Functional Differential Equations, 11 :223234 [Details] 

(2004)  'On the oscillation of certain third order neutral functional differential equations'
Agarwal, R.P., Grace, S.R. (2004) 'On the oscillation of certain third order neutral functional differential equations'. Far East Journal of Mathematical Sciences, 15 :137153 [Details] 

(2004)  'Generalized LeraySchauder principles in Hausdorff topological spaces for acyclic maps'
Agarwal, R.P., Dshalalow, J.H. (2004) 'Generalized LeraySchauder principles in Hausdorff topological spaces for acyclic maps'. Mathematical Sciences Research Journal, 8 :114117 [Details] 

(2004)  'Existence theory for single and multiple solutions to singular positone discrete Dirichlet boundary value problems to the onedimensional pLaplacian'
Jiang, D., Zhang, L., Agarwal, R.P. (2004) 'Existence theory for single and multiple solutions to singular positone discrete Dirichlet boundary value problems to the onedimensional pLaplacian'. Archivum Mathematicum (Brno), 40 :367381 [Details] 

(2004)  'A generalized upper and lower solution method for singular initial value problems'
Agarwal, RP,O'Regan, D,Lakshmikantham, V,Leela, S (2004) 'A generalized upper and lower solution method for singular initial value problems'. Computers & Mathematics With Applications, 47 :739750 [DOI] [Details] 

(2004)  'Random and deterministic fixed point theory for generalized contractive maps'
Agarwal, R.P., Sambandham, M. (2004) 'Random and deterministic fixed point theory for generalized contractive maps'. Applicable Analysis, 83 :711725 [Details] 

(2004)  'Fixed point theory for generalized contractive maps of MeirKeeler type'
Agarwal, RP,O'Regan, D,Shahzad, N (2004) 'Fixed point theory for generalized contractive maps of MeirKeeler type'. Mathematische Nachrichten, 276 :322 [DOI] [Details] 

(2003)  'Existence theorems for the onedimensional singular p  Laplacian equation with sign changing nonlinearities'
Agarwal, RP,Lu, HS,O'Regan, D (2003) 'Existence theorems for the onedimensional singular p  Laplacian equation with sign changing nonlinearities'. Applied Mathematics And Computation, 143 :1538 [DOI] [Details] 

(2003)  'The oscillation of certain higherorder functional differential equations'
Agarwal, RP,Grace, SR,O'Regan, D (2003) 'The oscillation of certain higherorder functional differential equations'. Mathematical And Computer Modelling, 37 :705728 [DOI] [Details] 

(2003)  'Fixed points of conecompressing and coneextending operators in Frechet spaces'
Frigon, M,O'Regan, D (2003) 'Fixed points of conecompressing and coneextending operators in Frechet spaces'. Bulletin Of The London Mathematical Society, 35 :672680 [DOI] [Details] 

(2003)  'Positive solutions of singular problems with sign changing Caratheodory nonlinearities depending on x ''
Agarwal, RP,O'Regan, D,Stanek, S (2003) 'Positive solutions of singular problems with sign changing Caratheodory nonlinearities depending on x ''. Journal Of Mathematical Analysis And Applications, 279 :597616 [DOI] [Details] 

(2003)  'Nonlinear generalized quasivariational inequalities: A fixed point approach'
Agarwal, RP,O'Regan, D (2003) 'Nonlinear generalized quasivariational inequalities: A fixed point approach'. Mathematical Inequalities & Applications, 6 :133143 [Details] 

(2003)  'Fixedpoint theorems for SKKM maps'
Agarwal, RP,O'Regan, D (2003) 'Fixedpoint theorems for SKKM maps'. Applied Mathematics Letters, 16 :12571264 [DOI] [Details] 

(2003)  'An index theory for countably Pconcentrative J maps'
Agarwal, RP,O'Regan, D (2003) 'An index theory for countably Pconcentrative J maps'. Applied Mathematics Letters, 16 :12651271 [DOI] [Details] 

(2003)  'Location of nonnegative solutions for differential equations on finite and semiinfinite intervals'
Agarwal, RP,Meehan, M,O'Regan, D,Precup, R (2003) 'Location of nonnegative solutions for differential equations on finite and semiinfinite intervals'. Dynamic Systems And Applications, 12 :323331 [Details] 

(2003)  'A necessary and sufficient condition for the existence of positive solutions to the singular pLaplacian'
Agarwal, RP,Lu, HS,O'Regan, D (2003) 'A necessary and sufficient condition for the existence of positive solutions to the singular pLaplacian'. Zeitschrift Fur Analysis Und Ihre Anwendungen, 22 :689709 [Details] 

(2003)  'EXISTENCE OF SOLUTIONS TO SECOND ORDER PROBLEMS WITH NONLINEAR BOUNDARY CONDITIONS'
Franco, D,O'Regan, D (2003) 'EXISTENCE OF SOLUTIONS TO SECOND ORDER PROBLEMS WITH NONLINEAR BOUNDARY CONDITIONS'. Discrete And Continuous Dynamical Systems, :273280 [Details] 

(2003)  'Various homotopy results for generalized single valued contractions on Fr´echet spaces'
OREGAN, D., Agarwal, R.P. (2003) 'Various homotopy results for generalized single valued contractions on Fr´echet spaces'. Journal of Concrete and Applicable Mathematics, 1 :101111 [Details] 

(2003)  'Singular problems modelling phenomena in the theory of pseudoplastic fluids'
Agarwal, RP,O'Regan, D (2003) 'Singular problems modelling phenomena in the theory of pseudoplastic fluids'. Anziam Journal, 45 :167179 [Details] 

(2003)  'Singular problems motivated from classical upper and lower solutions'
Agarwal, RP,O' Regan, D (2003) 'Singular problems motivated from classical upper and lower solutions'. Acta Mathematica Hungarica, 100 :245256 [Details] 

(2003)  'The five functionals fixed point theorem generalized to multivalued maps'
O'REGAN, D., Agarwal, R.P., Avery, R., Henderson, J. (2003) 'The five functionals fixed point theorem generalized to multivalued maps'. Journal of Nonlinear and Convex Analysis, 4 :455462 [Details] 

(2003)  'Upper and lower solutions for first order problems with nonlinear boundary conditions'
O'REGAN, D., Franco, D., Nieto, J.J. (2003) 'Upper and lower solutions for first order problems with nonlinear boundary conditions'. Extracta Mathematicae, 18 :153160 [Details] 

(2003)  'Antiperiodic boundary value problem for nonlinear first order ordinary differential equations'
Franco, D,Nieto, JJ,O'Regan, D (2003) 'Antiperiodic boundary value problem for nonlinear first order ordinary differential equations'. Mathematical Inequalities & Applications, 6 :477485 [Details] 

(2003)  'Twopoint higherorder BVPs with singularities in phase variables'
Agarwal, RP,O'Regan, D,Rachunkova, I,Stanek, S (2003) 'Twopoint higherorder BVPs with singularities in phase variables'. Computers & Mathematics With Applications, 46 :17991826 [DOI] [Details] 

(2003)  'Singular problems arising in circular membrane theory'
Agarwal, RP,O'Regan, D (2003) 'Singular problems arising in circular membrane theory'. Dynamics Of Continuous Discrete And Impulsive SystemsSeries AMathematical Analysis, 10 :965972 [Details] 

(2003)  'Discrete semipositone higherorder equations'
Agarwal, RP,Grace, SR,O'Regan, D (2003) 'Discrete semipositone higherorder equations'. Computers & Mathematics With Applications, 45 :11711179 [DOI] [Details] 

(2003)  'Infinite interval problems arising in nonlinear mechanics and nonNewtonian fluid flows'
Agarwal, RP,O'Regan, D (2003) 'Infinite interval problems arising in nonlinear mechanics and nonNewtonian fluid flows'. International Journal Of NonLinear Mechanics, 38 :13691376 [DOI] [Details] 

(2003)  'Optimal existence theory for single and multiple positive periodic solutions to functional differential equations'
O'REGAN, D., Jiang, D., Agarwal, R.P. (2003) 'Optimal existence theory for single and multiple positive periodic solutions to functional differential equations'. Nonlinear Oscillations, 6 :334345 [Details] 

(2003)  'Optimal existence conditions for the periodic delay _x001E_Laplace equation with upper and lower solutions in the reverse order'
O'REGAN, D., Zuo, W., Jiang, D., Agarwal, R.P. (2003) 'Optimal existence conditions for the periodic delay _x001E_Laplace equation with upper and lower solutions in the reverse order'. Results in Mathematics, 44 :375385 [Details] 

(2003)  'Nonlinear first order ordinary differential equations via DenjoyPerron integrals'
O'REGAN, D., Bugajewska, D. (2003) 'Nonlinear first order ordinary differential equations via DenjoyPerron integrals'. Archives of Inequalities and Applications, 1 :251260 [Details] 

(2003)  'Fixed point theory of Monch type for general classes of admissible maps'
OREGAN, D., Agarwal, R.P. (2003) 'Fixed point theory of Monch type for general classes of admissible maps'. Nonlinear Functional Analysis and Applications, 8 :609622 [Details] 

(2003)  'Fixed point theory for inward maps on topological vector spaces whose dual separates points'
O'REGAN, D. (2003) 'Fixed point theory for inward maps on topological vector spaces whose dual separates points'. Communications in Applied Analysis, 7 :291298 [Details] 

(2003)  'A survey of recent fixed point theory in Fr´echet spaces'
O'REGAN, D., Agarwal, R.P., Frigon, M. (2003) 'A survey of recent fixed point theory in Fr´echet spaces'. Nonlinear Analysis and Applications: To V. Lakshmikantham on his 80th Birthday, 1 :7588 [Details] 

(2003)  'Weakly sequentially continuous maps and existence principles for elliptic problems'
O'REGAN, D., Agarwal, R.P. (2003) 'Weakly sequentially continuous maps and existence principles for elliptic problems'. Applicationes Mathematicae, 30 :451460 [Details] 

(2003)  'Singular Lidstone boundary value problem with given maximal values for solutions'
Agarwal, RP,O'Regan, D,Stanek, S (2003) 'Singular Lidstone boundary value problem with given maximal values for solutions'. Nonlinear AnalysisTheory Methods & Applications, 55 :859881 [DOI] [Details] 

(2003)  'Positive solutions for the boundary value problem (u00p2u00)00  _x0015_ q(t) f(u(t)) = 0'
O'REGAN, D., Agarwal, R.P., Lu, H. (2003) 'Positive solutions for the boundary value problem (u00p2u00)00  _x0015_ q(t) f(u(t)) = 0'. Memoirs on Differential Equations and Mathematical Physics, 28 :3344 [Details] 

(2003)  'Oscillation criteria for sublinear and superlinear second order differential inclusions'
O'REGAN, D., Agarwal, R.P., Grace, S.R. (2003) 'Oscillation criteria for sublinear and superlinear second order differential inclusions'. Memoirs on Differential Equations and Mathematical Physics, 28 :112 [Details] 

(2003)  'On the oscillation of certain functional differential equations via comparison methods'
Agarwal, RP,Grace, SR,O'Regan, D (2003) 'On the oscillation of certain functional differential equations via comparison methods'. Journal Of Mathematical Analysis And Applications, 286 :577600 [DOI] [Details] 

(2003)  'Nonoscillatory solutions for discrete equations'
Agarwal, RP,Grace, SR,O'Regan, D (2003) 'Nonoscillatory solutions for discrete equations'. Computers & Mathematics With Applications, 45 :12971302 [DOI] [Details] 

(2003)  'The homotopic invariance for fixed points and fuzzy fixed points of multivalued generalized contractive maps'
OREGAN, D., Agarwal, R.P. (2003) 'The homotopic invariance for fixed points and fuzzy fixed points of multivalued generalized contractive maps'. Nonlinear Studies, 10 :187193 [Details] 

(2003)  'Initial and boundary value problems for fuzzy differential equations'
O'Regan, D,Lakshmikantham, V,Nieto, JJ (2003) 'Initial and boundary value problems for fuzzy differential equations'. Nonlinear AnalysisTheory Methods & Applications, 54 :405415 [DOI] [Details] 

(2003)  'Multiple positive solutions to superlinear periodic boundary value problems with repulsive singular forces'
Jiang, DQ,Chu, JF,O'Regan, D,Agarwal, RP (2003) 'Multiple positive solutions to superlinear periodic boundary value problems with repulsive singular forces'. Journal Of Mathematical Analysis And Applications, 286 :563576 [DOI] [Details] 

(2003)  'Random and deterministic fixed point and approximation results for countably 1setcontractive multimaps)'
O'REGAN, D., Shahzad, N. (2003) 'Random and deterministic fixed point and approximation results for countably 1setcontractive multimaps)'. Applicable Analysis, 82 :10551084 [Details] 

(2003)  'Random fixed point theory in spaces with two metrics'
O'REGAN, D., Agarwal, R.P., Shahzad, N. (2003) 'Random fixed point theory in spaces with two metrics'. Jour. Applied Mathematics and Stochastic Analysis, 16 :171176 [Details] 

(2003)  'A note on a new essential map approach for DKT maps'
O'REGAN, D. (2003) 'A note on a new essential map approach for DKT maps'. Nonlinear Functional Analysis and Applications, 8 :603608 [Details] 

(2003)  'A stacking theorem approach for fuzzy differential equations'
Agarwal, RP,O'Regan, D,Lakshmikantham, V (2003) 'A stacking theorem approach for fuzzy differential equations'. Nonlinear AnalysisTheory Methods & Applications, 55 :299312 [DOI] [Details] 

(2003)  'Homotopy invariant results on complete gauge spaces'
Agarwal, RP,Cho, YJ,O'Regan, D (2003) 'Homotopy invariant results on complete gauge spaces'. Bulletin Of The Australian Mathematical Society, 67 :241248 [Details] 

(2003)  'Homotopy results for weakly sequentially upper semicontinuous maps'
OREGAN, D., Agarwal, R.P. (2003) 'Homotopy results for weakly sequentially upper semicontinuous maps'. Nonlinear Functional Analysis and Applications, 8 :111122 [Details] 

(2003)  'Homotopy type results for nonlinear contractions on spaces with two metrics'
O'REGAN, D., Agarwal, R.P., Cho, Y.J. (2003) 'Homotopy type results for nonlinear contractions on spaces with two metrics'. Fixed Point Theory and Applications, 5 :19 [Details] 

(2003)  'An upper and lower solution approach for nonlinear singular boundary value problems with y0 dependence'
O'REGAN, D., Agarwal, R.P., Lakshmikantham, V. (2003) 'An upper and lower solution approach for nonlinear singular boundary value problems with y0 dependence'. Archives of Inequalities and Applications, 1 :119135 [Details] 

(2003)  'Infinite interval problems arising in the model of a slender dry patch in a liquid film draining under gravity down an inclined plane'
OREGAN, D., Agarwal, R.P. (2003) 'Infinite interval problems arising in the model of a slender dry patch in a liquid film draining under gravity down an inclined plane'. Methods and Applications of Analysis, 10 :363375 [Details] 

(2003)  'Infinite interval problems modelling phenomena which arise in the theory of plasma and electrical potential theory'
OREGAN, D., Agarwal, R.P. (2003) 'Infinite interval problems modelling phenomena which arise in the theory of plasma and electrical potential theory'. Studies in Applied Mathematics, 111 :339358 [Details] 

(2003)  'Integrable singularities and weakly sequentially continuous maps'
Agarwal, RP,O'Regan, D (2003) 'Integrable singularities and weakly sequentially continuous maps'. Zeitschrift Fur Analysis Und Ihre Anwendungen, 22 :4351 [Details] 

(2003)  'Infinite interval problems arising in nonlinear mechanics and nonNewtonian fluid theory'
OREGAN, D., Agarwal, R.P. (2003) 'Infinite interval problems arising in nonlinear mechanics and nonNewtonian fluid theory'. International Journal of Nonlinear Mechanics, 38 :13691376 [Details] 

(2003)  'Antiperiodic boundary value problems for nonlinear first order ordinary differential equations'
O'REGAN, D., Franco, D., Nieto, J.J. (2003) 'Antiperiodic boundary value problems for nonlinear first order ordinary differential equations'. Mathematical Inequalities and Applications, 6 :477485 [Details] 

(2003)  'Existence of nonoscillatory solutions of higher order partial difference equations of neutral type'
Zhou, Y,O'Regan, D,Agarwal, RP (2003) 'Existence of nonoscillatory solutions of higher order partial difference equations of neutral type'. Dynamic Systems And Applications, 12 :509519 [Details] 

(2003)  'Common fixed point theory for compatible maps'
O'REGAN, D., Shahzad, N., Agarwal, R.P. (2003) 'Common fixed point theory for compatible maps'. Nonlinear Analysis Forum, 8 :179222 [Details] 

(2003)  'BirkhoffKellogg theorems on invariant directions for multimaps'
OREGAN, D., Agarwal, R.P. (2003) 'BirkhoffKellogg theorems on invariant directions for multimaps'. Abstract and Applied Analysis, 7 :435448 [Details] 

(2003)  'A singular Homann differential equation'
Agarwal, RP,O'Regan, D (2003) 'A singular Homann differential equation'. Zeitschrift Fur Angewandte Mathematik Und Mechanik, 83 :344350 [Details] 

(2003)  'A Krasnoselskii cone compression theorem for Uk c maps'
O'REGAN, D. (2003) 'A Krasnoselskii cone compression theorem for Uk c maps'. Math. Proc. Royal Irish Academy, 103A :5559 [Details] 

(2003)  'The upper and lower solution method for differential inclusions via a lattice fixed point theorem'
O'REGAN, D., Agarwal, R.P., Dhage, B.C. (2003) 'The upper and lower solution method for differential inclusions via a lattice fixed point theorem'. Dynamic Systems and Applications, 12 :17 [Details] 

(2003)  'Singular problems arising in circular membrane theory, Dynamics of Continuous'
OREGAN, D., Agarwal, R.P. (2003) 'Singular problems arising in circular membrane theory, Dynamics of Continuous'. Discrete and Impulsive Systems (Ser. A: Mathematical Analysis), 10 :965972 [Details] 

(2003)  'Common fixed point theorems for a pair of countably condensing mappings in ordered Banach spaces'
O'REGAN, D., Dhage, B.C., Agarwal, R.P. (2003) 'Common fixed point theorems for a pair of countably condensing mappings in ordered Banach spaces'. Jour. Applied Mathematics and Stochastic Analysis, 16 :243248 [Details] 

(2003)  'An upper and lower solution method for the onedimensional singular pLaplacian'
O'REGAN, D., Agarwal, R.P., Lu, H. (2003) 'An upper and lower solution method for the onedimensional singular pLaplacian'. Memoirs on Differential Equations and Mathematical Physics, 28 :1331 [Details] 

(2003)  'Nonoscillatory criteria for singular higher order differential equations'
O'REGAN, D., Agarwal, R.P., Grace, S.R. (2003) 'Nonoscillatory criteria for singular higher order differential equations'. Aequationes Mathematicae, 66 :180190 [Details] 

(2003)  'Discrete second order inclusions'
Agarwal, RP,O'Regan, D,Lakshmikantham, V (2003) 'Discrete second order inclusions'. Journal Of Difference Equations And Applications, 9 :879885 [DOI] [Details] 

(2003)  'On nonoscillatory solutions of differential inclusions'
Agarwal, RP,Grace, SR,O'Regan, D (2003) 'On nonoscillatory solutions of differential inclusions'. Proceedings Of The American Mathematical Society, 131 :129140 [Details] 

(2003)  'Existence criteria for singular boundary value problems modelling the membrane response of a spherical cap'
Agarwal, RP,O'Regan, D,Lakshmikantham, V (2003) 'Existence criteria for singular boundary value problems modelling the membrane response of a spherical cap'. Nonlinear AnalysisReal World Applications, 4 :223244 [DOI] [Details] 

(2003)  'On the oscillation of certain second order difference equations'
Agarwal, RP,Grace, SR,O'Regan, D (2003) 'On the oscillation of certain second order difference equations'. Journal Of Difference Equations And Applications, 9 :109119 [DOI] [Details] 

(2003)  'Existence of positive solutions for the onedimensional singular pLaplacian equation with sign changing nonlinearities via the method of upper and lower solution'
O'REGAN, D., Lu, H., Agarwal, R.P. (2003) 'Existence of positive solutions for the onedimensional singular pLaplacian equation with sign changing nonlinearities via the method of upper and lower solution'. Methods and Applications of Analysis, 10 :533542 [Details] 

(2003)  'Existence of positive solutions for the singular equation (_x001E_p(y0))0 + g(t, y, y0) ='
O'REGAN, D., Lu, H., Zhong, C. (2003) 'Existence of positive solutions for the singular equation (_x001E_p(y0))0 + g(t, y, y0) ='. Nonlinear Oscillations, 6 :117132 [Details] 

(2003)  'Common fixed point theory in uniform spaces'
O'REGAN, D., Agarwal, R.P., Dshalalow, J.H. (2003) 'Common fixed point theory in uniform spaces'. Commentationes Mathematicae (Prace Matematyczne), 43 :129147 [Details] 

(2003)  'Continuation theory for contractions on spaces with two vectorvalued metrics'
O'REGAN, D., Precup, R. (2003) 'Continuation theory for contractions on spaces with two vectorvalued metrics'. Applicable Analysis, 82(2003), 131144, 82 :131144 [Details] 

(2003)  'Boundary value problems on infinite intervals: a topological approach'
O'REGAN, D., Agarwal, R.P., Bohner, M. (2003) 'Boundary value problems on infinite intervals: a topological approach'. Advances in Dynamic Equations on Time Scales, :275291 [Details] 

(2003)  'Oscillation of bounded solutions of certain functional differential equations via integral inequalities'
O'REGAN, D., Agarwal, R.P., Grace, S.R. (2003) 'Oscillation of bounded solutions of certain functional differential equations via integral inequalities'. Nonlinear Analysis Forum, 8 :111121 [Details] 

(2003)  'Existence theory for single and multiple solutions to singular boundary value problems for the onedimensional pLaplacian'
O'REGAN, D., Jiang, D., Agarwal, R.P. (2003) 'Existence theory for single and multiple solutions to singular boundary value problems for the onedimensional pLaplacian'. Advances in Mathematical Sciences and Applications, 13 :179199 [Details] 

(2003)  'Existence theory for single and multiple solutions to singular positone boundary value problems for the delay onedimensional pLaplacian'
O'REGAN, D., Jiang, D., Xu, X., Agarwal, R.P. (2003) 'Existence theory for single and multiple solutions to singular positone boundary value problems for the delay onedimensional pLaplacian'. Annales Polonici Mathematici, 81 :237359 [Details] 

(2003)  'Fixed point and homotopy results for generalized contractive maps of Reich type'
O'REGAN, D., Agarwal, R.P., Dshalalow, J.H. (2003) 'Fixed point and homotopy results for generalized contractive maps of Reich type'. Applicable Analysis, 82 :329350 [Details] 

(2003)  'Fixed point theorems for SKKM maps'
OREGAN, D., Agarwal, R.P. (2003) 'Fixed point theorems for SKKM maps'. Applied Math. Letters, 16 :12571264 [Details] 

(2003)  'Fixed point theory and generalized LeraySchauder alternatives for approximable maps in topological vector spaces'
O'REGAN, D., Agarwal, R.P., Precup, R. (2003) 'Fixed point theory and generalized LeraySchauder alternatives for approximable maps in topological vector spaces'. Topological Methods in Nonlinear Analysis, 22 :193202 [Details] 

(2003)  'Volterra integral equations: the singular case'
OREGAN, D., Agarwal, R.P. (2003) 'Volterra integral equations: the singular case'. Hokkaido Mathematical Journal, 32 :371381 [Details] 

(2003)  'Fixed point theory for admissible multimaps defined on closed subsets of Frechet spaces'
O'Regan, D,Agarwal, RP (2003) 'Fixed point theory for admissible multimaps defined on closed subsets of Frechet spaces'. Journal Of Mathematical Analysis And Applications, 277 :438445 [DOI] [Details] 

(2003)  'Existence theory for single and multiple solutions to semipositone discrete Dirichlet boundary value problems with singular dependent nonlinearities'
O'REGAN, D., Jiang, D., Zhang, L., Agarwal, R.P. (2003) 'Existence theory for single and multiple solutions to semipositone discrete Dirichlet boundary value problems with singular dependent nonlinearities'. Jour. Applied Mathematics and Stochastic Analysis 16(2003), 1931, 16 :1931 [Details] 

(2003)  'Existence results for BVsolutions of nonlinear integral equations'
O'REGAN, D., Bugajewska, D. (2003) 'Existence results for BVsolutions of nonlinear integral equations'. Jour. Integral Equations and Applications, 15 :343357 [Details] 

(2003)  'Approximation and fixed point theorems for countable condensing composite maps'
O'Regan, D,Shahzad, N (2003) 'Approximation and fixed point theorems for countable condensing composite maps'. Bulletin Of The Australian Mathematical Society, 68 :161168 [Details] 

(2003)  'An essential map theory U_x0014_c and PK maps'
OREGAN, D., Agarwal, R.P. (2003) 'An essential map theory U_x0014_c and PK maps'. Topological Methods in Nonlinear Analysis, 21 :375386 [Details] 

(2003)  'A topological degree for pairs'
OREGAN, D., Agarwal, R.P. (2003) 'A topological degree for pairs'. Fixed Point Theory and Applications, 4 :1117 [Details] 

(2003)  'A new upper and lower solutions approach for second order problems with nonlinear boundary conditions'
O'REGAN, D., Franco, D. (2003) 'A new upper and lower solutions approach for second order problems with nonlinear boundary conditions'. Archives of Inequalities and Applications, 1 :413420 [Details] 

(2003)  'Triple solutions for the one dimensional pLaplacian'
O'REGAN, D., Lu, H., Agarwal, R.P. (2003) 'Triple solutions for the one dimensional pLaplacian'. Glasnik Matemati?cki, 38 :273284 [Details] 

(2003)  'Nonoscillatory solutions for higher order dynamic equations'
Agarwal, RP,Grace, SR,O'Regan, D (2003) 'Nonoscillatory solutions for higher order dynamic equations'. Journal Of The London Mathematical SocietySecond Series, 67 :165179 [DOI] [Details] 

(2002)  'Nonlinear boundary value problems on the semiinfinite interval: An upper and lower solution approach'
Agarwal, RP,O'Regan, D (2002) 'Nonlinear boundary value problems on the semiinfinite interval: An upper and lower solution approach'. Mathematika, 49 :129140 [Details] 

(2002)  'Nonoscillatory solutions of delay and neutral differential equations'
O'REGAN, D., Agarwal, R.P., Grace, S.R. (2002) 'Nonoscillatory solutions of delay and neutral differential equations'. Applicable Analysis, 81 :12211244 [Details] 

(2002)  'Countably Pconcentrative pairs and the coincidence index'
Agarwal, RP,O'Regan, D (2002) 'Countably Pconcentrative pairs and the coincidence index'. Applied Mathematics Letters, 15 :439444 [DOI] [Details] 

(2002)  'An upper and lower solution theory for singular EmdenFowler equations'
Agarwal, RP,O'Regan, D,Lakshmikantham, V,Leela, S (2002) 'An upper and lower solution theory for singular EmdenFowler equations'. Nonlinear AnalysisReal World Applications, 3 :275291 [DOI] [Details] 

(2002)  'Eigenvalues and the onedimensional pLaplacian'
Agarwal, RP,Lu, HS,O'Regan, D (2002) 'Eigenvalues and the onedimensional pLaplacian'. Journal Of Mathematical Analysis And Applications, 266 :383400 [Details] 

(2002)  'An upper and lower solution approach for a generalized ThomasFermi theory of neutral atoms'
Agarwal, RP,O'Regan, D (2002) 'An upper and lower solution approach for a generalized ThomasFermi theory of neutral atoms'. Mathematical Problems In Engineering, 8 :135142 [DOI] [Details] 

(2002)  'Boundary value problems on the half line in the theory of colloids'
Agarwal, RP,O'Regan, D (2002) 'Boundary value problems on the half line in the theory of colloids'. Mathematical Problems In Engineering, 8 :143150 [DOI] [Details] 

(2002)  'SINGULAR DIFFERENTIAL, INTEGRAL AND DISCRETE EQUATIONS: THE SEMIPOSITONE CASE'
Agarwal, RP,O'Regan, D (2002) 'SINGULAR DIFFERENTIAL, INTEGRAL AND DISCRETE EQUATIONS: THE SEMIPOSITONE CASE'. Moscow Mathematical Journal, 2 :115 [Details] 

(2002)  'Upper and lower solutions for problems with singular sign changing nonlinearities and with nonlinear boundary data'
O'REGAN, D. (2002) 'Upper and lower solutions for problems with singular sign changing nonlinearities and with nonlinear boundary data'. Topological Methods in Nonlinear Analysis, 19 :375390 [Details] 

(2002)  'A LeraySchauder alternative for Monch maps on closed subsets of Frechet spaces'
Frigon, M,O'Regan, D (2002) 'A LeraySchauder alternative for Monch maps on closed subsets of Frechet spaces'. Zeitschrift Fur Analysis Und Ihre Anwendungen, 21 :753760 [Details] 

(2002)  'A general existence theorem for the singular equation (phi(p)(y '))' plus f(t, y)=0'
Lu, HS,O'Regan, D (2002) 'A general existence theorem for the singular equation (phi(p)(y '))' plus f(t, y)=0'. Mathematical Inequalities & Applications, 5 :6978 [Details] 

(2002)  'Infinite interval problems Modeling the flow of a gas through a semiinfinite porous medium'
Agarwal, RP,O'Regan, D (2002) 'Infinite interval problems Modeling the flow of a gas through a semiinfinite porous medium'. Studies In Applied Mathematics, 108 :245257 [Details] 

(2002)  'Nonuniform nonresonance at the first eigenvalue for singular boundary value problems with sign changing nonlinearities'
Agarwal, RP,O'Regan, D,Lakshmikantham, V (2002) 'Nonuniform nonresonance at the first eigenvalue for singular boundary value problems with sign changing nonlinearities'. Journal Of Mathematical Analysis And Applications, 274 :404423 [DOI] [Details] 

(2002)  'KKM maps and fixed point theory'
OREGAN, D., Agarwal, R.P. (2002) 'KKM maps and fixed point theory'. Fixed Point Theory and Applications, 3 :113 [Details] 

(2002)  'Fuzzy contractive maps and fuzzy fixed points'
Frigon, M,O'Regan, D (2002) 'Fuzzy contractive maps and fuzzy fixed points'. Fuzzy Sets And Systems, 129 :3945 [DOI] [Details] 

(2002)  'Random degree and essentiality for countably condensing maps'
Agarwal, RP,O'Regan, D,Sambandham, M (2002) 'Random degree and essentiality for countably condensing maps'. Stochastic Analysis And Applications, 20 :11691176 [DOI] [Details] 

(2002)  'A unified fixed point theory for countably Pconcentrative multimaps'
O'REGAN, D. (2002) 'A unified fixed point theory for countably Pconcentrative multimaps'. Applicable Analysis, 81 :565574 [Details] 

(2002)  'Positive solutions of Volterra integral equations using integral inequalities'
Meehan, M,O'Regan, D (2002) 'Positive solutions of Volterra integral equations using integral inequalities'. Journal Of Inequalities And Applications, 7 :285307 [DOI] [Details] 

(2002)  'Fixed point theory for multimaps in extension type spaces'
Agarwal, RP,O'Regan, D,Park, S (2002) 'Fixed point theory for multimaps in extension type spaces'. Journal Of The Korean Mathematical Society, 39 :579591 [Details] 

(2002)  'A LeraySchauder alternative for M¨onch maps on closed subsets of Fr´echet spaces'
O'REGAN, D., Frigon, M. (2002) 'A LeraySchauder alternative for M¨onch maps on closed subsets of Fr´echet spaces'. Zeitschrift f¨ur Analysis und ihre Anwendungen, 21 :753760 [Details] 

(2002)  'A note on random fixed point theorems for single valued generalized contractive random maps'
O'REGAN, D., Agarwal, R.P., Sambandham, M. (2002) 'A note on random fixed point theorems for single valued generalized contractive random maps'. Nonlinear Analysis Forum, 7 :231236 [Details] 

(2002)  'Fixed points, morphisms, countably condensing pairs and index theory'
OREGAN, D., Agarwal, R.P. (2002) 'Fixed points, morphisms, countably condensing pairs and index theory'. Nonlinear Functional Analysis and Applications, 7 :241253 [Details] 

(2002)  'FuriPera type theorems for the Uk c admissible maps of Park'
O'REGAN, D. (2002) 'FuriPera type theorems for the Uk c admissible maps of Park'. Math. Proc. Royal Irish Academy, 102A :163173 [Details] 

(2002)  'Homotopy and LeraySchauder principles for multimaps'
OREGAN, D., Agarwal, R.P. (2002) 'Homotopy and LeraySchauder principles for multimaps'. Nonlinear Analysis Forum, 7 :103111 [Details] 

(2002)  'Hyperconvex spaces and fixed points'
OREGAN, D., Agarwal, R.P. (2002) 'Hyperconvex spaces and fixed points'. Georgian Math. Journal, 9 :199206 [Details] 

(2002)  'An upper and lower solution approach for singular boundary value problems with sign changing nonlinearities'
Agarwal, RP,O'Regan, D (2002) 'An upper and lower solution approach for singular boundary value problems with sign changing nonlinearities'. Mathematical Methods In The Applied Sciences, 25 :491506 [DOI] [Details] 

(2002)  'Infinite interval problems modelling the flow of a gas through a semiinfinite porous medium'
OREGAN, D., Agarwal, R.P. (2002) 'Infinite interval problems modelling the flow of a gas through a semiinfinite porous medium'. Studies in Appl. Math, 108 :245257 [Details] 

(2002)  'Existence criteria for singular boundary value problems with sign changing nonlinearities'
Agarwal, RP,O'Regan, D (2002) 'Existence criteria for singular boundary value problems with sign changing nonlinearities'. Journal Of Differential Equations, 183 :409433 [DOI] [Details] 

(2002)  'Dynamic equations on time scales: a survey'
Agarwal, R,Bohner, M,O'Regan, D,Peterson, A (2002) 'Dynamic equations on time scales: a survey'. Journal Of Computational And Applied Mathematics, 141 :126 [DOI] [Details] 

(2002)  'Fixed point theory for acyclic maps between topological vector spaces having sufficiently many linear functionals, and generalized contractive maps with closed values between complete metric spaces'
OREGAN, D., Agarwal, R.P. (2002) 'Fixed point theory for acyclic maps between topological vector spaces having sufficiently many linear functionals, and generalized contractive maps with closed values between complete metric spaces'. Set Valued Mappings with Applications in Nonlinear Analysis, :1726 [Details] 

(2002)  'Existence of nonnegative solutions for resonant periodic boundary value problems with impulses'
O'REGAN, D., Franco, D., Nieto, J.J. (2002) 'Existence of nonnegative solutions for resonant periodic boundary value problems with impulses'. Nonlinear Studies, 9 :110 [Details] 

(2002)  'Countably collectively condensing operator approximation theory'
OREGAN, D., Agarwal, R.P. (2002) 'Countably collectively condensing operator approximation theory'. International Journal of Computational and Numerical Analysis and Applications, 1 :115 [Details] 

(2002)  'Boundary value problems with sign changing nonlinearities for second order singular ordinary differential equations'
OREGAN, D., Agarwal, R.P. (2002) 'Boundary value problems with sign changing nonlinearities for second order singular ordinary differential equations'. Applicable Analysis, 81 :13291346 [Details] 

(2002)  'A note on the structure of the solution set for the Cauchy differential inclusion in Banach spaces'
OREGAN, D., Agarwal, R.P. (2002) 'A note on the structure of the solution set for the Cauchy differential inclusion in Banach spaces'. Set Valued Mappings with Applications in Nonlinear Analysis, :1115 [Details] 

(2002)  'Fixed point theory for weakly sequentially upper semicontinuous maps with applications to differential inclusions'
OREGAN, D., Agarwal, R.P. (2002) 'Fixed point theory for weakly sequentially upper semicontinuous maps with applications to differential inclusions'. Nonlinear Oscillations, 5 :287296 [Details] 

(2002)  'Nonlinear boundary value problems on the semiinfinite interval: an upper and lower solution approach'
OREGAN, D., Agarwal, R.P. (2002) 'Nonlinear boundary value problems on the semiinfinite interval: an upper and lower solution approach'. Mathematika, 49 :129140 [Details] 

(2002)  'Existence of positive solutions for singular initial and boundary value problems via the classical upper and lower solution approach'
Agarwal, RP,O'Regan, D,Lakshmikantham, V,Leela, S (2002) 'Existence of positive solutions for singular initial and boundary value problems via the classical upper and lower solution approach'. Nonlinear AnalysisTheory Methods & Applications, 50 :215222 [DOI] [Details] 

(2002)  'Existence of positive solutions to semipositone Fredholm integral equations'
O'REGAN, D., Agarwal, R.P., Grace, S.R. (2002) 'Existence of positive solutions to semipositone Fredholm integral equations'. Funkcialaj Ekvacioj, 45 :223235 [Details] 

(2002)  'Collectively fixed point theorems'
OREGAN, D., Agarwal, R.P. (2002) 'Collectively fixed point theorems'. Nonlinear Analysis Forum, 7 :167179 [Details] 

(2002)  'Boundary value problems on the half line modelling phenomena in the theory of colloids'
OREGAN, D., Agarwal, R.P. (2002) 'Boundary value problems on the half line modelling phenomena in the theory of colloids'. Mathematical Problems in Engineering, 8 :143150 [Details] 

(2002)  'Oscillation criteria of comparison type for higher order difference equations'
O'REGAN, D., Agarwal, R.P., Grace, S.R. (2002) 'Oscillation criteria of comparison type for higher order difference equations'. Nonlinear Analysis Forum, 7 :7391 [Details] 

(2002)  'Existence theory for singular initial and boundary value problems: a fixed point approach'
OREGAN, D., Agarwal, R.P. (2002) 'Existence theory for singular initial and boundary value problems: a fixed point approach'. Applicable Analysis, 81 :391434 [Details] 

(2002)  'A general existence theorem for the singular equation (_x001E_p(y0))0 +f(t, y) ='
O'REGAN, D., Lu, H. (2002) 'A general existence theorem for the singular equation (_x001E_p(y0))0 +f(t, y) ='. Mathematical Inequalities and Applications, 5 :6978 [Details] 

(2002)  'A lattice fixed point theorem and multivalued differential equations'
O'REGAN, D., Dhage, B.C. (2002) 'A lattice fixed point theorem and multivalued differential equations'. Functional Differential Equations, 9 :109115 [Details] 

(2002)  'Time scale boundary value problems on infinite intervals'
Agarwal, RP,Bohner, M,O'Regan, D (2002) 'Time scale boundary value problems on infinite intervals'. Journal Of Computational And Applied Mathematics, 141 :2734 [DOI] [Details] 

(2002)  'Random fixed point theory for multivalued countably condensing random operators'
Agarwal, RP,O'Regan, D,Sambandham, M (2002) 'Random fixed point theory for multivalued countably condensing random operators'. Stochastic Analysis And Applications, 20 :11571168 [DOI] [Details] 

(2002)  'Multivalued nonlinear equations on the half line: a fixed point approach'
OREGAN, D., Agarwal, R.P. (2002) 'Multivalued nonlinear equations on the half line: a fixed point approach'. Korean Jour. Computational and Applied Math, 9 :509524 [Details] 

(2002)  'Integrable solutions of Hammerstein integral inclusions in Banach spaces'
O'Regan, D,Precup, R (2002) 'Integrable solutions of Hammerstein integral inclusions in Banach spaces'. Dynamics Of Continuous Discrete And Impulsive SystemsSeries AMathematical Analysis, 9 :165176 [Details] 

(2002)  'Fixed points for admissible multimaps'
Agarwal, RP,O'Regan, D (2002) 'Fixed points for admissible multimaps'. Dynamic Systems And Applications, 11 :437447 [Details] 

(2002)  'Upper and lower solutions for singular problems with nonlinear boundary data'
Agarwal, RP,O'Regan, D (2002) 'Upper and lower solutions for singular problems with nonlinear boundary data'. NodeaNonlinear Differential Equations And Applications, 9 :419440 [Details] 

(2002)  'Singular integral equations arising in Homann flow'
Agarwal, RP,O'Regan, D (2002) 'Singular integral equations arising in Homann flow'. Dynamics Of Continuous Discrete And Impulsive SystemsSeries BApplications & Algorithms, 9 :481488 [Details] 

(2002)  'Positive Lp and continuous solutions for Fredholm integral inclusions'
O'REGAN, D., Agarwal, R.P., Meehan, M. (2002) 'Positive Lp and continuous solutions for Fredholm integral inclusions'. Set Valued Mappings with Applications in Nonlinear Analysis, :19 [Details] 

(2002)  'On the oscillation of second order functional differential equations'
O'REGAN, D., Agarwal, R.P., Grace, S.R. (2002) 'On the oscillation of second order functional differential equations'. Advances in Mathematical Sciences and Applications, 12 :257272 [Details] 

(2002)  'Multiple positive solutions for the onedimensional singular pLaplacian'
Lu, HS,O'Regan, D,Zhong, CK (2002) 'Multiple positive solutions for the onedimensional singular pLaplacian'. Applied Mathematics And Computation, 133 :407422 [DOI] [Details] 

(2001)  'Variational inequalities, coincidence theory, and minimax inequalities'
Agarwal, RP,O'Regan, D (2001) 'Variational inequalities, coincidence theory, and minimax inequalities'. Applied Mathematics Letters, 14 :989996 [Details] 

(2001)  'Singular nonresonant Dirichlet boundary value problems and quadratic forms'
O'REGAN, D., Agarwal, R.P., Lakshmikantham, V. (2001) 'Singular nonresonant Dirichlet boundary value problems and quadratic forms'. Nonlinear Studies, 8 :1320 [Details] 

(2001)  'Time scale systems on infinite intervals'
O'REGAN, D., Agarwal, R.P., Bohner, M. (2001) 'Time scale systems on infinite intervals'. Proc. ThirdWorld Congress of Nonlinear Analysts, Nonlinear Analysis, 47 :837848 [Details] 

(2001)  'Upper and lower solutions for singular problems arising in the theory of membrane response of a spherical cap'
O'REGAN, D. (2001) 'Upper and lower solutions for singular problems arising in the theory of membrane response of a spherical cap'. Proc. Third World Congress of Nonlinear Analysts, Nonlinear Analysis, 47 :11631174 [Details] 

(2001)  'Cone compression and expansion fixed point theorems in Frechet spaces with applications'
Agarwal, RP,O'Regan, D (2001) 'Cone compression and expansion fixed point theorems in Frechet spaces with applications'. Journal Of Differential Equations, 171 :412429 [Details] 

(2001)  'Fixedpoint theorems for multivalued maps with closed values on complete gauge spaces'
Agarwal, RP,O'Regan, D (2001) 'Fixedpoint theorems for multivalued maps with closed values on complete gauge spaces'. Applied Mathematics Letters, 14 :831836 [Details] 

(2001)  'A generalization of the PetryshynLeggettWilliams fixed point theorem with applications to integral inclusions'
Agarwal, RP,O'Regan, D (2001) 'A generalization of the PetryshynLeggettWilliams fixed point theorem with applications to integral inclusions'. Applied Mathematics And Computation, 123 :263274 [Details] 

(2001)  'Fixedpoint theorems for countably condensing maps on Frechet spaces'
Agarwal, RP,O'Regan, D (2001) 'Fixedpoint theorems for countably condensing maps on Frechet spaces'. Computers & Mathematics With Applications, 42 :909916 [Details] 

(2001)  'Twin nonnegative solutions for higherorder boundary value problems'
Agarwal, RP,O'Regan, D,Lakshmikantham, V (2001) 'Twin nonnegative solutions for higherorder boundary value problems'. Nonlinear AnalysisTheory Methods & Applications, 43 :6173 [Details] 

(2001)  'Second order SturmLiouville BVP's with impulses at variable moments'
Frigon, M,O'Regan, D (2001) 'Second order SturmLiouville BVP's with impulses at variable moments'. Dynamics Of Continuous Discrete And Impulsive SystemsSeries AMathematical Analysis, 8 :149159 [Details] 

(2001)  'Fixedpoint theory for set valued mappings between topological vector spaces having sufficiently many linear functionals'
Agarwal, RP,O'Regan, D (2001) 'Fixedpoint theory for set valued mappings between topological vector spaces having sufficiently many linear functionals'. Computers & Mathematics With Applications, 41 :917928 [Details] 

(2001)  'Nonlinear Urysohn discrete equations on the infinite interval: A fixedpoint approach equations'
Agarwal, RP,O'Regan, D (2001) 'Nonlinear Urysohn discrete equations on the infinite interval: A fixedpoint approach equations'. Computers & Mathematics With Applications, 42 :273281 [Details] 

(2001)  'Fixed point theory for self maps between Frechet spaces'
Agarwal, RP,O'Regan, D (2001) 'Fixed point theory for self maps between Frechet spaces'. Journal Of Mathematical Analysis And Applications, 256 :498512 [Details] 

(2001)  'Essentiality for Monch type maps'
Agarwal, RP,O'Regan, D (2001) 'Essentiality for Monch type maps'. Proceedings Of The American Mathematical Society, 129 :10151020 [Details] 

(2001)  'Nonlinear boundary value problems on time scales'
Agarwal, RP,O'Regan, D (2001) 'Nonlinear boundary value problems on time scales'. Nonlinear AnalysisTheory Methods & Applications, 44 :527535 [Details] 

(2001)  'Homotopy and existence of solutions for the nonlinear equation Lx is an element of Nx'
Agarwal, RP,O'Regan, D (2001) 'Homotopy and existence of solutions for the nonlinear equation Lx is an element of Nx'. Nonlinear AnalysisTheory Methods & Applications, 44 :537544 [Details] 

(2001)  'Characteristics of arterial wall shear stress which cause endotheliumdependent vasodilatation in the anaesthetized dog'
Snow, HM,Markos, F,O'Regan, D,Pollock, K (2001) 'Characteristics of arterial wall shear stress which cause endotheliumdependent vasodilatation in the anaesthetized dog'. Journal Of PhysiologyLondon, 531 :843848 [Details] 

(2001)  'Multiple random fixed points for multivalued random maps'
O'REGAN, D., Shahzad, N. (2001) 'Multiple random fixed points for multivalued random maps'. Dynamic Systems and Applications, 10 :110 [Details] 

(2001)  'Fixed point theorems for the Bkadmissible maps of Park'
O'REGAN, D. (2001) 'Fixed point theorems for the Bkadmissible maps of Park'. Applicable Analysis, 79 :173185 [Details] 

(2001)  'Essential upper semicontinuous compact maps on normal topological vector spaces which have the fixed point property'
O'REGAN, D. (2001) 'Essential upper semicontinuous compact maps on normal topological vector spaces which have the fixed point property'. Fixed Point Theory and Applications, 2 :1725 [Details] 

(2001)  'A note on upper and lower solutions for singular initial value problems'
Agarwal, RP,O'Regan, D (2001) 'A note on upper and lower solutions for singular initial value problems'. Mathematical Methods In The Applied Sciences, 24 :4957 [Details] 

(2001)  'A note on positive solutions of Fredholm integral equations and related boundary value problems'
O'REGAN, D., Meehan, M. (2001) 'A note on positive solutions of Fredholm integral equations and related boundary value problems'. Math. Proc. Royal Irish Academy, 101A :7585 [Details] 

(2001)  'Nonlinear essential maps of M¨onch, 1set contractive demicompact and monotone (S)+ type'
OREGAN, D., Agarwal, R.P. (2001) 'Nonlinear essential maps of M¨onch, 1set contractive demicompact and monotone (S)+ type'. Journal of Applied Mathematics and Stochastic Analysis, 14 :293301 [Details] 

(2001)  'Fixed points and essentiality for weakly continuous maps'
OREGAN, D., Agarwal, R.P. (2001) 'Fixed points and essentiality for weakly continuous maps'. Nonlinear Analysis Forum, 6 :281290 [Details] 

(2001)  'Fixed point theorems for countably condensing maps on Fr´echet spaces'
OREGAN, D., Agarwal, R.P. (2001) 'Fixed point theorems for countably condensing maps on Fr´echet spaces'. Computers and Mathematics with Applications, 42 (06Jul):909916 [Details] 

(2001)  'Existence criteria for integral equations in Banach spaces'
O'Regan, D,Precup, R (2001) 'Existence criteria for integral equations in Banach spaces'. Journal Of Inequalities And Applications, 6 :7797 [Details] 

(2001)  'A note on the existence of solutions to initial and boundary value problems in the complex domain'
OREGAN, D., Agarwal, R.P. (2001) 'A note on the existence of solutions to initial and boundary value problems in the complex domain'. Complex Variables, Theory and Applications, 44 :331340 [Details] 

(2001)  'A note on equilibria for abstract economies'
Agarwal, RP,O'Regan, D (2001) 'A note on equilibria for abstract economies'. Mathematical And Computer Modelling, 34 :331343 [Details] 

(2001)  'Hermite continuous and discrete boundary value problems'
OREGAN, D., Agarwal, R.P. (2001) 'Hermite continuous and discrete boundary value problems'. Nonlinear Studies, 8 :5363 [Details] 

(2001)  'Positive solutions for Fredholm multivalued equations'
O'REGAN, D., Meehan, M. (2001) 'Positive solutions for Fredholm multivalued equations'. Proceedings of Dynamic Systems and Applications, 3 :425431 [Details] 

(2001)  'Quadratic forms and nonlinear nonresonant singular second order boundary value problems of limit circle type'
Agarwal, RP,O'Regan, D,Lakshmikantham, V (2001) 'Quadratic forms and nonlinear nonresonant singular second order boundary value problems of limit circle type'. Zeitschrift Fur Analysis Und Ihre Anwendungen, 20 :727737 [Details] 

(2001)  'Admissibility and existence principles for integral and discrete equations and inclusions on the half line: a fixed point approach'
OREGAN, D., Agarwal, R.P. (2001) 'Admissibility and existence principles for integral and discrete equations and inclusions on the half line: a fixed point approach'. Journal of Nonlinear and Convex Analysis, 2 :393414 [Details] 

(2001)  'Homotopy results for admissible multifunctions'
O'REGAN, D. (2001) 'Homotopy results for admissible multifunctions'. Nonlinear Functional Analysis and Applications, 6 :217228 [Details] 

(2001)  'A fixed point theorem of Leggett Williams type with applications to single and multivalued equations'
OREGAN, D., Agarwal, R.P. (2001) 'A fixed point theorem of Leggett Williams type with applications to single and multivalued equations'. Georgian Mathematical Journal, 8 :1325 [Details] 

(2001)  'Positive LP solutions of Hammerstein integral equations'
Meehan, M,O'Regan, D (2001) 'Positive LP solutions of Hammerstein integral equations'. Archiv Der Mathematik, 76 :366376 [Details] 

(2001)  'Fixed point theory for maps with lower semicontinuous selections and equilibrium theory for abstract economies'
OREGAN, D., Agarwal, R.P. (2001) 'Fixed point theory for maps with lower semicontinuous selections and equilibrium theory for abstract economies'. Journal of Nonlinear and Convex Analysis, 2 :3146 [Details] 

(2001)  'Existence criteria for singular initial value problems with sign changing nonlinearities'
Agarwal, RP,O'Regan, D,Lakshmikantham, V (2001) 'Existence criteria for singular initial value problems with sign changing nonlinearities'. Mathematical Problems In Engineering, 7 :503524 [Details] 

(2001)  'Continuation theorems for countably condensing maps'
OREGAN, D., Agarwal, R.P. (2001) 'Continuation theorems for countably condensing maps'. Nonlinear Functional Analysis and Applications, 6 :18 [Details] 

(2001)  'A note on a singular integral equation arising in a problem in communications'
Agarwal, RP,O'Regan, D (2001) 'A note on a singular integral equation arising in a problem in communications'. Zeitschrift Fur Angewandte Mathematik Und Mechanik, 81 :499504 [Details] 

(2001)  'A generalization of the KrasnoselskiiPetryshyn compression and expansion theorem: an essential map approach'
OREGAN, D., Agarwal, R.P. (2001) 'A generalization of the KrasnoselskiiPetryshyn compression and expansion theorem: an essential map approach'. J. Korean Math. Society, 38 :669681 [Details] 

(2001)  'Continuation theory for Mönch type perturbations of linear Fredholm maps of index zero'
O'REGAN, D. (2001) 'Continuation theory for Mönch type perturbations of linear Fredholm maps of index zero'. Nonlinear Functional Analysis and Applications, 6 :369376 [Details] 

(2001)  'Continuums of solutions for integral inclusions on the half line'
OREGAN, D., Agarwal, R.P. (2001) 'Continuums of solutions for integral inclusions on the half line'. Korean Jour. Computational and Applied Math, 8 :399411 [Details] 

(2001)  'Existence of positive solutions to time scale equations using time scale inequalities'
Agarwal, RP,O'Regan, D (2001) 'Existence of positive solutions to time scale equations using time scale inequalities'. Journal Of Difference Equations And Applications, 7 :829836 [Details] 

(2001)  'Existence of three solutions to integral and discrete equations via the Leggett Williams fixed point theorem'
Agarwal, RP,O'Regan, D (2001) 'Existence of three solutions to integral and discrete equations via the Leggett Williams fixed point theorem'. Rocky Mountain Journal Of Mathematics, 31 :2335 [Details] 

(2001)  'Existence theory for single and multiple periodic and almost periodic solutions of nonlinear integral equations'
OREGAN, D., Agarwal, R.P. (2001) 'Existence theory for single and multiple periodic and almost periodic solutions of nonlinear integral equations'. Nonlinear Oscillations, 4 :215 [Details] 

(2001)  'Existence theory for single and multiple solutions to singular positone boundary value problems'
Agarwal, RP (2001) 'Existence theory for single and multiple solutions to singular positone boundary value problems'. Journal Of Differential Equations, 175 :393414 [DOI] [Details] 

(2001)  'Fixed point theory for maps having convexly totally bounded ranges'
OREGAN, D., Agarwal, R.P. (2001) 'Fixed point theory for maps having convexly totally bounded ranges'. Bull. Korean Mathematical Society, 38 :669677 [Details] 

(2001)  'Twin solutions to right focal (1, n1) singular boundary value problems'
O'REGAN, D. (2001) 'Twin solutions to right focal (1, n1) singular boundary value problems'. Proceedings of Dynamic Systems and Applications, 3 :497504 [Details] 

(2001)  'Oscillation criteria for certain nth order differential equations with deviating arguments'
Agarwal, RP,Grace, SR,O'Regan, D (2001) 'Oscillation criteria for certain nth order differential equations with deviating arguments'. Journal Of Mathematical Analysis And Applications, 262 :601622 [Details] 

(2001)  'Multiplicity results for singular conjugate, focal and (n, p) problems'
OREGAN, D., Agarwal, R.P. (2001) 'Multiplicity results for singular conjugate, focal and (n, p) problems'. Jour. Differential Equations, 170 :142156 [Details] 

(2001)  'Multiple nonnegative solutions to singular and nonsingular discrete problems'
OREGAN, D., Agarwal, R.P. (2001) 'Multiple nonnegative solutions to singular and nonsingular discrete problems'. Aequationes Mathematicae, 61 :97112 [Details] 

(2001)  'Fixed point theory for set valued mappings between topological vector spaces having sufficiently many linear functionals'
OREGAN, D., Agarwal, R.P. (2001) 'Fixed point theory for set valued mappings between topological vector spaces having sufficiently many linear functionals'. Computers and Mathematics with Applications, 41 (07Aug):917928 [Details] 

(2001)  'Continuous and discrete boundary value problems on the infinite interval: Existence theory'
Agarwal, RP,O'Regan, D (2001) 'Continuous and discrete boundary value problems on the infinite interval: Existence theory'. Mathematika, 48 :273292 [Details] 

(2001)  'Singular problems on the infinite interval modelling phenomena in draining flows'
Agarwal, RP,O'Regan, D (2001) 'Singular problems on the infinite interval modelling phenomena in draining flows'. Ima Journal Of Applied Mathematics, 66 :621635 [Details] 

(2000)  'Singular problems: An upper and lower solution approach'
O'Regan, D,Agarwal, RP (2000) 'Singular problems: An upper and lower solution approach'. Journal Of Mathematical Analysis And Applications, 251 :230250 [Details] 

(2000)  'Fixed point theorems for setvalued maps and existence principles for integral inclusions'
O'Regan, D,Precup, R (2000) 'Fixed point theorems for setvalued maps and existence principles for integral inclusions'. Journal Of Mathematical Analysis And Applications, 245 :594612 [Details] 

(2000)  'Fixed point theory for kCAR sets'
Agarwal, RP,O'Regan, D (2000) 'Fixed point theory for kCAR sets'. Journal Of Mathematical Analysis And Applications, 251 :1327 [DOI] [Details] 

(2000)  'Nonlinear operator inclusions on the half line'
Agarwal, RP,O'Regan, D (2000) 'Nonlinear operator inclusions on the half line'. Mathematical And Computer Modelling, 32 :12871296 [Details] 

(2000)  'Fixedpoint theory for closed inward set valued maps'
Agarwal, RP,O'Regan, D (2000) 'Fixedpoint theory for closed inward set valued maps'. Mathematical And Computer Modelling, 32 :13051310 [Details] 

(2000)  'Periodic solutions to nonlinear integral equations on the infinite interval modelling infectious disease'
Agarwal, RP,O'Regan, D (2000) 'Periodic solutions to nonlinear integral equations on the infinite interval modelling infectious disease'. Nonlinear AnalysisTheory Methods & Applications, 40 :2135 [Details] 

(2000)  'Singular initial and boundary value problems with sign changing nonlinearities'
Agarwal, RP,O'Regan, D (2000) 'Singular initial and boundary value problems with sign changing nonlinearities'. Ima Journal Of Applied Mathematics, 65 :173198 [Details] 

(2000)  'Fixed point theory in Frechet spaces and variational inequalities'
Agarwal, RP,O'Regan, D (2000) 'Fixed point theory in Frechet spaces and variational inequalities'. Nonlinear AnalysisTheory Methods & Applications, 42 :10911099 [Details] 

(2000)  'Fixed point theory for generalized contractions on spaces with two metrics'
Agarwal, RP,O'Regan, D (2000) 'Fixed point theory for generalized contractions on spaces with two metrics'. Journal Of Mathematical Analysis And Applications, 248 :402414 [Details] 

(2000)  'Singular (p, np) focal and (n, p) higher order boundary value problems'
Agarwal, RP,O'Regan, D,Lakshmikantham, V (2000) 'Singular (p, np) focal and (n, p) higher order boundary value problems'. Nonlinear AnalysisTheory Methods & Applications, 42 :215228 [Details] 

(2000)  'Existence results for singular integral equations of Fredholm type'
Agarwal, RP,O'Regan, D (2000) 'Existence results for singular integral equations of Fredholm type'. Applied Mathematics Letters, 13 :2734 [Details] 

(2000)  'Essential and inessential maps and continuation theorems'
Agarwal, RP,O'Regan, D (2000) 'Essential and inessential maps and continuation theorems'. Applied Mathematics Letters, 13 :8390 [Details] 

(2000)  'Discrete conjugate boundary value problems'
Agarwal, RP,O'Regan, D (2000) 'Discrete conjugate boundary value problems'. Applied Mathematics Letters, 13 :97104 [Details] 

(2000)  'Some new results for singular problems with sign changing nonlinearities'
Agarwal, RP,O'Regan, D (2000) 'Some new results for singular problems with sign changing nonlinearities'. Journal Of Computational And Applied Mathematics, 113 :115 [Details] 

(2000)  'Existence criteria for operator inclusions in abstract spaces'
Agarwal, RP,O'Regan, D (2000) 'Existence criteria for operator inclusions in abstract spaces'. Journal Of Computational And Applied Mathematics, 113 :183193 [Details] 

(2000)  'Second and higher order boundary value problems of nonsingular type'
Agarwal, RP,O'Regan, D (2000) 'Second and higher order boundary value problems of nonsingular type'. Bulletin Of The Belgian Mathematical SocietySimon Stevin, 7 :4352 [Details] 

(2000)  'Nonpositone discrete boundary value problems'
Agarwal, RP,O'Regan, D (2000) 'Nonpositone discrete boundary value problems'. Nonlinear AnalysisTheory Methods & Applications, 39 :207215 [Details] 

(2000)  'Triple solutions to boundary value problems on time scales'
Agarwal, RP,O'Regan, D (2000) 'Triple solutions to boundary value problems on time scales'. Applied Mathematics Letters, 13 :711 [Details] 

(2000)  'A note on the existence of multiple fixed points for multivalued maps with applications'
Agarwal, RP,O'Regan, D (2000) 'A note on the existence of multiple fixed points for multivalued maps with applications'. Journal Of Differential Equations, 160 :389403 [Details] 

(2000)  'Twin solutions to singular boundary value problems'
Agarwal, RP,O'Regan, D (2000) 'Twin solutions to singular boundary value problems'. Proceedings Of The American Mathematical Society, 128 :20852094 [Details] 

(2000)  'Discrete focal boundaryvalue problems'
Agarwal, RP,O'Regan, D (2000) 'Discrete focal boundaryvalue problems'. Proceedings Of The Edinburgh Mathematical Society, 43 :155165 [Details] 

(2000)  'A coupled system of difference equations'
Agarwal, RP,O'Regan, D (2000) 'A coupled system of difference equations'. Applied Mathematics And Computation, 114 :3949 [Details] 

(2000)  'Multiple nonnegative solutions for second order impulsive differential equations'
Agarwal, RP,O'Regan, D (2000) 'Multiple nonnegative solutions for second order impulsive differential equations'. Applied Mathematics And Computation, 114 :5159 [Details] 

(2000)  'Multivalued essential maps of approximable and acyclic type'
Agarwal, RP,O'Regan, D (2000) 'Multivalued essential maps of approximable and acyclic type'. Applied Mathematics Letters, 13 :711 [Details] 

(2000)  'Singular Volterra integral equations'
Agarwal, RP,O'Regan, D (2000) 'Singular Volterra integral equations'. Applied Mathematics Letters, 13 :115120 [Details] 

(2000)  'Singular and nonsingular boundary value problems with sign changing nonlinearities'
Kannan, R,O'Regan, D (2000) 'Singular and nonsingular boundary value problems with sign changing nonlinearities'. Journal Of Inequalities And Applications, 5 :621637 [Details] 

(2000)  'Fixed point theory of Monch type for weakly sequentially upper semicontinuous maps'
O'Regan, D (2000) 'Fixed point theory of Monch type for weakly sequentially upper semicontinuous maps'. Bulletin Of The Australian Mathematical Society, 61 :439449 [Details] 

(2000)  'Weakly inward zero EPI maps'
O'Regan, D (2000) 'Weakly inward zero EPI maps'. Applied Mathematics Letters, 13 :1316 [Details] 

(2000)  'Fixedpoint and random fixedpoint theorems in cones of Banach spaces'
O'Regan, D (2000) 'Fixedpoint and random fixedpoint theorems in cones of Banach spaces'. Mathematical And Computer Modelling, 32 :14731483 [Details] 

(2000)  'A multiplicity fixed point theorem in Frechet spaces'
O'Regan, D (2000) 'A multiplicity fixed point theorem in Frechet spaces'. Zeitschrift Fur Analysis Und Ihre Anwendungen, 19 :853862 [Details] 

(2000)  'Multiple solutions for a coupled system of boundary value problems'
Agarwal, RP,O'Regan, D (2000) 'Multiple solutions for a coupled system of boundary value problems'. Dynamics Of Continuous Discrete And Impulsive Systems, 7 :97106 [Details] 

(1999)  'Singular discrete (n,p) boundary value problems'
Agarwal, RP,O'Regan, D (1999) 'Singular discrete (n,p) boundary value problems'. Applied Mathematics Letters, 12 :113119 [Details] 

(1999)  'Continuation methods for closed, weakly closed, DKT, and WDKT maps'
Agarwal, RP,O'Regan, D (1999) 'Continuation methods for closed, weakly closed, DKT, and WDKT maps'. Computers & Mathematics With Applications, 38 :8188 [Details] 

(1999)  'An essential map approach for multivalued Aproper, weakly inward, DKT and weakly closed maps'
Agarwal, RP,O'Regan, D (1999) 'An essential map approach for multivalued Aproper, weakly inward, DKT and weakly closed maps'. Computers & Mathematics With Applications, 38 :89100 [Details] 

(1999)  'A note on existence of nonnegative solutions to singular semipositone problems'
Agarwal, RP,O'Regan, D (1999) 'A note on existence of nonnegative solutions to singular semipositone problems'. Nonlinear AnalysisTheory Methods & Applications, 36 :615622 [Details] 

(1999)  'Topological essentiality and fixed point theory'
Agarwal, RP,O'Regan, D (1999) 'Topological essentiality and fixed point theory'. Applied Mathematics Letters, 12 :510 [Details] 

(1999)  'Positive solutions of singular and nonsingular Fredholm integral equations'
Meehan, M,O'Regan, D (1999) 'Positive solutions of singular and nonsingular Fredholm integral equations'. Journal Of Mathematical Analysis And Applications, 240 :416432 [Details] 

(1999)  'Twin solutions to singular Dirichlet problems'
Agarwal, RP,O'Regan, D (1999) 'Twin solutions to singular Dirichlet problems'. Journal Of Mathematical Analysis And Applications, 240 :433445 [Details] 

(1999)  'Global existence for nonlinear operator inclusions'
Agarwal, RP,O'Regan, D (1999) 'Global existence for nonlinear operator inclusions'. Computers & Mathematics With Applications, 38 :131139 [Details] 

(1999)  'Boundary value problems of nonsingular type on the semiinfinite interval'
Agarwal, RP,O'Regan, D (1999) 'Boundary value problems of nonsingular type on the semiinfinite interval'. Tohoku Mathematical Journal, 51 :391397 [Details] 

(1999)  'Existence principles for continuous and discrete equations on infinite intervals in Banach spaces'
Agarwal, RP,O'Regan, D (1999) 'Existence principles for continuous and discrete equations on infinite intervals in Banach spaces'. Mathematische Nachrichten, 207 :519 [Details] 

(1999)  'The set of solutions for abstract Volterra equations in Lp([0,a],Rm)'
Bedivan, DM,O'Regan, D (1999) 'The set of solutions for abstract Volterra equations in Lp([0,a],Rm)'. Applied Mathematics Letters, 12 :711 [Details] 

(1999)  'Existence and approximation of solutions of nonlinear discrete systems on infinite intervals'
Agarwal, RP,O'Regan, D (1999) 'Existence and approximation of solutions of nonlinear discrete systems on infinite intervals'. Mathematical Methods In The Applied Sciences, 22 :9199 [Details] 

(1999)  'Existence of solutions to singular integral equations'
Agarwal, RP,O'Regan, D (1999) 'Existence of solutions to singular integral equations'. Computers & Mathematics With Applications, 37 :2529 [Details] 

(1999)  'Multiple solutions for higherorder difference equations'
Agarwal, RP,O'Regan, D (1999) 'Multiple solutions for higherorder difference equations'. Computers & Mathematics With Applications, 37 :3948 [Details] 

(1999)  'Multiple solutions for the Dirichlet secondorder boundary value problem of nonsingular type'
Agarwal, RP,O'Regan, D (1999) 'Multiple solutions for the Dirichlet secondorder boundary value problem of nonsingular type'. Computers & Mathematics With Applications, 37 :99106 [Details] 

(1999)  'Singular discrete boundary value problems'
Agarwal, RP,O'Regan, D (1999) 'Singular discrete boundary value problems'. Applied Mathematics Letters, 12 :127131 [Details] 

(1999)  'A General Coincidence Theory for SetValued Maps'
O'Regan, D (1999) 'A General Coincidence Theory for SetValued Maps'. Zeitschrift Fur Analysis Und Ihre Anwendungen, 18 :701712 [Details] 

(1999)  'Periodic and almost periodic solutions of integral equations'
O'Regan, D,Meehan, M (1999) 'Periodic and almost periodic solutions of integral equations'. Applied Mathematics And Computation, 105 :121136 [Details] 

(1999)  'Homotopy and epi maps'
O'Regan, D (1999) 'Homotopy and epi maps'. Archiv Der Mathematik, 73 :459464 [Details] 

(1999)  'Nonlinear alternatives for multivalued maps with applications to operator inclusions in abstract spaces'
O'Regan, D (1999) 'Nonlinear alternatives for multivalued maps with applications to operator inclusions in abstract spaces'. Proceedings Of The American Mathematical Society, 127 :35573564 [Details] 

(1999)  'Fixed points and random fixed points for alphaLipschitzian maps'
O'Regan, D (1999) 'Fixed points and random fixed points for alphaLipschitzian maps'. Nonlinear AnalysisTheory Methods & Applications, 37 :537544 [Details] 

(1999)  'Multivalued operator equations on noncompact intervals'
O'Regan, D (1999) 'Multivalued operator equations on noncompact intervals'. Dynamics Of Continuous Discrete And Impulsive Systems, 6 :6975 [Details] 

(1999)  'Continuation principles and dessential maps'
O'Regan, D (1999) 'Continuation principles and dessential maps'. Mathematical And Computer Modelling, 30 :16 [Details] 

(1999)  'Random fixed point theory for multivalued maps'
O'Regan, D (1999) 'Random fixed point theory for multivalued maps'. Stochastic Analysis And Applications, 17 :597607 [Details] 

(1999)  'Existence and approximation of fixed points for multivalued maps'
O'Regan, D (1999) 'Existence and approximation of fixed points for multivalued maps'. Applied Mathematics Letters, 12 :3743 [Details] 

(1999)  'Weakly contractive zero epi maps'
O'Regan, D (1999) 'Weakly contractive zero epi maps'. Mathematical And Computer Modelling, 30 :2125 [Details] 

(1999)  'Multivalued differential equations in Banach spaces'
O'Regan, D (1999) 'Multivalued differential equations in Banach spaces'. Computers & Mathematics With Applications, 38 :109116 [Details] 

(1999)  'Weak solutions of ordinary differential equations in Banach spaces'
O'Regan, D (1999) 'Weak solutions of ordinary differential equations in Banach spaces'. Applied Mathematics Letters, 12 :101105 [Details] 

(1999)  'Coincidence points for perturbations of linear fredholm maps of index zero'
Agarwal, RP,O'Regan, D (1999) 'Coincidence points for perturbations of linear fredholm maps of index zero'. Publications Of The Research Institute For Mathematical Sciences, 35 :725736 [Details] 

(1999)  'Existence theory for nonlinear Fredholm and Volterra integral equations on halfopen intervals'
Meehan, M,O'Regan, D (1999) 'Existence theory for nonlinear Fredholm and Volterra integral equations on halfopen intervals'. Nonlinear AnalysisTheory Methods & Applications, 35 :355387 [Details] 

(1999)  'Right focal singular boundary value problems'
Agarwal, RP,O'Regan, D (1999) 'Right focal singular boundary value problems'. Zeitschrift Fur Angewandte Mathematik Und Mechanik, 79 :363373 [Details] 

(1999)  'A note on singular boundary value problems with solutions in weighted spaces'
Kannan, R,O'Regan, D (1999) 'A note on singular boundary value problems with solutions in weighted spaces'. Nonlinear AnalysisTheory Methods & Applications, 37 :791796 [Details] 

(1999)  'Periodic solutions for abstract operator equations'
Meehan, M,O'Regan, D (1999) 'Periodic solutions for abstract operator equations'. Applied Mathematics Letters, 12 :121129 [Details] 

(1999)  'First order impulsive initial and periodic problems with variable moments'
Frigon, M,O'Regan, D (1999) 'First order impulsive initial and periodic problems with variable moments'. Journal Of Mathematical Analysis And Applications, 233 :730739 [Details] 

(1999)  'Coincidences for DKT maps in Frechet spaces and minimax inequalities'
Agarwal, RP,O'Regan, D (1999) 'Coincidences for DKT maps in Frechet spaces and minimax inequalities'. Applied Mathematics Letters, 12 :1319 [Details] 

(1999)  'Single and twin coincidence points for multivalued maps in Frechet spaces'
Agarwal, RP,O'Regan, D (1999) 'Single and twin coincidence points for multivalued maps in Frechet spaces'. Applied Mathematics Letters, 12 :9199 [Details] 

(1998)  'Coincidence principles and fixed point theory for mappings in locally convex spaces'
O'Regan, D (1998) 'Coincidence principles and fixed point theory for mappings in locally convex spaces'. Rocky Mountain Journal Of Mathematics, 28 :14071445 [Details] 

(1998)  'Operator equations in Banach spaces relative to the weak topology'
O'Regan, D (1998) 'Operator equations in Banach spaces relative to the weak topology'. Archiv Der Mathematik, 71 :123136 [Details] 

(1998)  'Positive solutions for (p, np) conjugate boundary value problems'
Agarwal, RP,O'Regan, D (1998) 'Positive solutions for (p, np) conjugate boundary value problems'. Journal Of Differential Equations, 150 :462473 [Details] 

(1998)  'A fixedpoint approach for nonlinear discrete boundary value problems'
Agarwal, RP,O'Regan, D (1998) 'A fixedpoint approach for nonlinear discrete boundary value problems'. Computers & Mathematics With Applications, 36 :115121 [Details] 

(1998)  'Nonlinear superlinear singular and nonsingular second order boundary value problems'
Agarwal, RP,O'Regan, D (1998) 'Nonlinear superlinear singular and nonsingular second order boundary value problems'. Journal Of Differential Equations, 143 :6095 [Details] 

(1998)  'Existence principles for nonlinear resonant operator and integral equations'
Meehan, M,O'Regan, D (1998) 'Existence principles for nonlinear resonant operator and integral equations'. Computers & Mathematics With Applications, 36 :4152 [Details] 

(1998)  'Difference equations in abstract spaces'
Agarwal, RP,O'Regan, D (1998) 'Difference equations in abstract spaces'. Journal Of The Australian Mathematical Society Series APure Mathematics And Statistics, 64 :277284 [Details] 

(1998)  'Secondorder boundary value problems of singular type'
Agarwal, RP,O'Regan, D (1998) 'Secondorder boundary value problems of singular type'. Journal Of Mathematical Analysis And Applications, 226 :414430 [Details] 

(1998)  'Existence principles for nonresonant operator and integral equations'
Meehan, M,O'Regan, D (1998) 'Existence principles for nonresonant operator and integral equations'. Computers & Mathematics With Applications, 35 :7987 [Details] 

(1998)  'Discrete systems on infinite intervals'
Agarwal, RP,O'Regan, D (1998) 'Discrete systems on infinite intervals'. Computers & Mathematics With Applications, 35 :97105 [Details] 

(1998)  'Existence theory for nonlinear Volterra integrodifferential and integral equations'
Meehan, M,O'Regan, D (1998) 'Existence theory for nonlinear Volterra integrodifferential and integral equations'. Nonlinear AnalysisTheory Methods & Applications, 31 :317341 [Details] 

(1998)  'Fixed Point Theory for Weakly Contractive Maps with Applications to Operator Inclusions in Banach Spaces Relative to the Weak Topology'
O'Regan, D (1998) 'Fixed Point Theory for Weakly Contractive Maps with Applications to Operator Inclusions in Banach Spaces Relative to the Weak Topology'. Zeitschrift Fur Analysis Und Ihre Anwendungen, 17 :281296 [Details] 

(1998)  'Continuation methods based on essential and 0epi maps'
O'Regan, D (1998) 'Continuation methods based on essential and 0epi maps'. Acta Applicandae Mathematicae, 54 :319330 [Details] 

(1998)  'Approximation of solutions of nonlinear operator equation on the half line'
O'Regan, D (1998) 'Approximation of solutions of nonlinear operator equation on the half line'. Computers & Mathematics With Applications, 35 :6577 [Details] 

(1998)  'Fixed point theorems and equilibrium points in abstract economies'
O'Regan, D (1998) 'Fixed point theorems and equilibrium points in abstract economies'. Bulletin Of The Australian Mathematical Society, 58 :3341 [Details] 

(1998)  'Singular Dirichlet boundary value problems II: Resonance case'
O'Regan, D (1998) 'Singular Dirichlet boundary value problems II: Resonance case'. Czechoslovak Mathematical Journal, 48 :269289 [Details] 

(1998)  'Singular differential equations with linear and nonlinear boundary conditions'
O'Regan, D (1998) 'Singular differential equations with linear and nonlinear boundary conditions'. Computers & Mathematics With Applications, 35 :8197 [Details] 

(1998)  'Coincidences for admissible and Phi star maps and minimax inequalities'
O'Regan, D (1998) 'Coincidences for admissible and Phi star maps and minimax inequalities'. Journal Of Mathematical Analysis And Applications, 220 :322333 [Details] 

(1998)  'A continuation type result for random operators'
O'Regan, D (1998) 'A continuation type result for random operators'. Proceedings Of The American Mathematical Society, 126 :19631971 [Details] 

(1998)  'A continuation theory for weakly inward maps'
O'Regan, D (1998) 'A continuation theory for weakly inward maps'. Glasgow Mathematical Journal, 40 :311321 [Details] 

(1998)  'Fixedpoint theory for multivalued mappings in completely regular topological vector spaces'
O'Regan, D (1998) 'Fixedpoint theory for multivalued mappings in completely regular topological vector spaces'. Mathematical And Computer Modelling, 28 :715 [Details] 

(1998)  'Positive solutions to singular initial value problems with sign changing nonlinearities'
Agarwal, RP,O'Regan, D (1998) 'Positive solutions to singular initial value problems with sign changing nonlinearities'. Mathematical And Computer Modelling, 28 :3139 [Details] 

(1998)  'Fixedpoint theory for weakly sequentially continuous mappings'
O'Regan, D (1998) 'Fixedpoint theory for weakly sequentially continuous mappings'. Mathematical And Computer Modelling, 27 :114 [Details] 

(1998)  'New fixedpoints results for 1set contractive set valued maps'
O'Regan, D (1998) 'New fixedpoints results for 1set contractive set valued maps'. Computers & Mathematics With Applications, 35 :2734 [Details] 

(1998)  'Fixed points and random fixed points for weakly inward approximable maps'
O'Regan, D (1998) 'Fixed points and random fixed points for weakly inward approximable maps'. Proceedings Of The American Mathematical Society, 126 :30453053 [Details] 

(1998)  'Nonlinear operator approximation theory'
O'Regan, D (1998) 'Nonlinear operator approximation theory'. Numerical Functional Analysis And Optimization, 19 :587592 [Details] 

(1998)  'Fixed points for setvalued mappings in locally convex linear topological spaces'
O'Regan, D (1998) 'Fixed points for setvalued mappings in locally convex linear topological spaces'. Mathematical And Computer Modelling, 28 :4555 [Details] 

(1998)  'Positive solutions to superlinear singular boundary value problems'
Agarwal, RP,O'Regan, D (1998) 'Positive solutions to superlinear singular boundary value problems'. Journal Of Computational And Applied Mathematics, 88 :129147 [Details] 

(1997)  'Fixed points for M* and regularly approximable maps'
ORegan, D (1997) 'Fixed points for M* and regularly approximable maps'. Integral Equations And Operator Theory, 28 :321329 [Details] 

(1997)  'Existence of nonnegative solutions to superlinear nonpositone problems via a fixed point theorem in cones of banach spaces'
ORegan, D (1997) 'Existence of nonnegative solutions to superlinear nonpositone problems via a fixed point theorem in cones of banach spaces'. Dynamics Of Continuous Discrete And Impulsive Systems, 3 :517530 [Details] 

(1997)  'Singular Dirichlet boundary value problems .1. Superlinear and nonresonant case'
ORegan, D (1997) 'Singular Dirichlet boundary value problems .1. Superlinear and nonresonant case'. Nonlinear AnalysisTheory Methods & Applications, 29 :221245 [Details] 

(1997)  'A general existence principle for strong solutions to the dirichlet problem for the equation Delta u+f(t,u)=O'
ORegan, D (1997) 'A general existence principle for strong solutions to the dirichlet problem for the equation Delta u+f(t,u)=O'. Applied Mathematics Letters, 10 :2932 [Details] 

(1996)  'Nonresonant nonlinear singular problems in the limit circle case'
ORegan, D (1996) 'Nonresonant nonlinear singular problems in the limit circle case'. Journal Of Mathematical Analysis And Applications, 197 :708725 [Details] 

(1996)  'Boundary value problems singular in the solution variable with nonlinear boundary data'
ORegan, D (1996) 'Boundary value problems singular in the solution variable with nonlinear boundary data'. Proceedings Of The Edinburgh Mathematical Society, 39 :505523 [Details] 

(1996)  'Fixedpoint theory for the sum of two operators'
ORegan, D (1996) 'Fixedpoint theory for the sum of two operators'. Applied Mathematics Letters, 9 :18 [Details] 

(1996)  'Some fixed point theorems for concentrative mappings between locally convex linear topological spaces'
ORegan, D (1996) 'Some fixed point theorems for concentrative mappings between locally convex linear topological spaces'. Nonlinear AnalysisTheory Methods & Applications, 27 :14371446 [Details] 

(1996)  'A fixedpoint theorem for weakly condensing operators'
ORegan, D (1996) 'A fixedpoint theorem for weakly condensing operators'. Proceedings Of The Royal Society Of Edinburgh Section AMathematics, 126 :391398 [Details] 

(1996)  'Fixed point theorems for nonlinear operators'
ORegan, D (1996) 'Fixed point theorems for nonlinear operators'. Journal Of Mathematical Analysis And Applications, 202 :413432 [Details] 

(1996)  'Continuation fixed point theorems for locally convex linear topological spaces'
ORegan, D (1996) 'Continuation fixed point theorems for locally convex linear topological spaces'. Mathematical And Computer Modelling, 24 :5770 [Details] 

(1996)  'Integral inclusions of upper semicontinuous or lower semicontinuous type'
ORegan, D (1996) 'Integral inclusions of upper semicontinuous or lower semicontinuous type'. Proceedings Of The American Mathematical Society, 124 :23912399 [Details] 

(1996)  'Integral equations in reflexive Banach spaces and weak topologies'
ORegan, D (1996) 'Integral equations in reflexive Banach spaces and weak topologies'. Proceedings Of The American Mathematical Society, 124 :607614 [Details] 

(1995)  'Resonant singular boundary value problems'
ORegan, D (1995) 'Resonant singular boundary value problems'. Rocky Mountain Journal Of Mathematics, 25 :14591475 [Details] 

(1995)  'A FIXEDPOINT THEOREM FOR CONDENSING OPERATORS AND APPLICATIONS TO HAMMERSTEIN INTEGRALEQUATIONS IN BANACHSPACES'
OREGAN, D (1995) 'A FIXEDPOINT THEOREM FOR CONDENSING OPERATORS AND APPLICATIONS TO HAMMERSTEIN INTEGRALEQUATIONS IN BANACHSPACES'. Computers & Mathematics With Applications, 30 :3949 [Details] 

(1995)  'EXISTENCE THEORY FOR NONRESONANT SINGULAR BOUNDARYVALUEPROBLEMS'
OREGAN, D (1995) 'EXISTENCE THEORY FOR NONRESONANT SINGULAR BOUNDARYVALUEPROBLEMS'. Proceedings Of The Edinburgh Mathematical Society, 38 :431447 [Details] 

(1995)  'BOUNDARYVALUEPROBLEMS ON NONCOMPACT INTERVALS'
OREGAN, D (1995) 'BOUNDARYVALUEPROBLEMS ON NONCOMPACT INTERVALS'. Proceedings Of The Royal Society Of Edinburgh Section AMathematics, 125 :777799 [Details] 

(1995)  'MEASURES OF NONCOMPACTNESS, DARBO MAPS AND DIFFERENTIALEQUATIONS IN ABSTRACT SPACES'
OREGAN, D (1995) 'MEASURES OF NONCOMPACTNESS, DARBO MAPS AND DIFFERENTIALEQUATIONS IN ABSTRACT SPACES'. Acta Mathematica Hungarica, 69 :233261 [Details] 

(1995)  'EXISTENCE RESULTS FOR NONLINEAR INTEGRALEQUATIONS'
OREGAN, D (1995) 'EXISTENCE RESULTS FOR NONLINEAR INTEGRALEQUATIONS'. Journal Of Mathematical Analysis And Applications, 192 :705726 [Details] 

(1994)  'NONRESONANCE AND EXISTENCE FOR SINGULAR BOUNDARYVALUEPROBLEMS'
OREGAN, D (1994) 'NONRESONANCE AND EXISTENCE FOR SINGULAR BOUNDARYVALUEPROBLEMS'. Nonlinear AnalysisTheory Methods & Applications, 23 :165186 [Details] 

(1994)  'EXISTENCE THEORY FOR THE EQUATIONS (G'(Y))'=QF(T,Y,Y') AND (G'(Y)PH(Y))'=P'H(Y)+QF(T,Y)'
OREGAN, D (1994) 'EXISTENCE THEORY FOR THE EQUATIONS (G'(Y))'=QF(T,Y,Y') AND (G'(Y)PH(Y))'=P'H(Y)+QF(T,Y)'. Journal Of Mathematical Analysis And Applications, 183 :435470 [Details] 

(1994)  'EXISTENCE RESULTS FOR DIFFERENTIALEQUATIONS WITH REFLECTION OF THE ARGUMENT'
OREGAN, D (1994) 'EXISTENCE RESULTS FOR DIFFERENTIALEQUATIONS WITH REFLECTION OF THE ARGUMENT'. Journal Of The Australian Mathematical Society Series APure Mathematics And Statistics, 57 :237260 [Details] 

(1993)  'SOME GENERAL EXISTENCE PRINCIPLES AND RESULTS FOR (PHI(Y'))=QF(T,Y,Y'),OLESSTHANTLESSTHAN1'
OREGAN, D (1993) 'SOME GENERAL EXISTENCE PRINCIPLES AND RESULTS FOR (PHI(Y'))=QF(T,Y,Y'),OLESSTHANTLESSTHAN1'. Siam Journal On Mathematical Analysis, 24 :648668 [Details] 

(1993)  'NONLINEARSYSTEMS OF 2 POINT BOUNDARYVALUEPROBLEMS'
OREGAN, D (1993) 'NONLINEARSYSTEMS OF 2 POINT BOUNDARYVALUEPROBLEMS'. Nonlinear AnalysisTheory Methods & Applications, 20 :979991 [Details] 

(1993)  'EXISTENCE OF SOLUTIONS TO SOME DIFFERENTIAL DELAY EQUATIONS'
OREGAN, D (1993) 'EXISTENCE OF SOLUTIONS TO SOME DIFFERENTIAL DELAY EQUATIONS'. Nonlinear AnalysisTheory Methods & Applications, 20 :7995 [Details] 

(1993)  'SINGULAR NONLINEAR DIFFERENTIALEQUATIONS'
OREGAN, D (1993) 'SINGULAR NONLINEAR DIFFERENTIALEQUATIONS'. Utilitas Mathematica, 44 :165176 [Details] 

(1993)  'SINGULAR STURM LIOUVILLE PROBLEMS AND EXISTENCE OF SOLUTIONS TO SINGULAR NONLINEAR BOUNDARYVALUEPROBLEMS'
OREGAN, D (1993) 'SINGULAR STURM LIOUVILLE PROBLEMS AND EXISTENCE OF SOLUTIONS TO SINGULAR NONLINEAR BOUNDARYVALUEPROBLEMS'. Nonlinear AnalysisTheory Methods & Applications, 20 :767779 [Details] 

(1992)  'SOME EXISTENCE PRINCIPLES AND SOME GENERAL RESULTS FOR SINGULAR NONLINEAR 2 POINT BOUNDARYVALUEPROBLEMS'
OREGAN, D (1992) 'SOME EXISTENCE PRINCIPLES AND SOME GENERAL RESULTS FOR SINGULAR NONLINEAR 2 POINT BOUNDARYVALUEPROBLEMS'. Journal Of Mathematical Analysis And Applications, 166 :2440 [Details] 

(1992)  'EXISTENCE THEOREMS FOR CERTAIN CLASSES OF SINGULAR BOUNDARYVALUEPROBLEMS'
OREGAN, D (1992) 'EXISTENCE THEOREMS FOR CERTAIN CLASSES OF SINGULAR BOUNDARYVALUEPROBLEMS'. Journal Of Mathematical Analysis And Applications, 168 :523539 [Details] 
Books
Year  Publication  

(2014)  Oscillation and stability of delay models in biology.
Agarwal, Ravi P. and O'Regan, Donal and Saker, Samir H. (2014) Oscillation and stability of delay models in biology. : Springer, Cham. [DOI] [Details] 

(2013)  Constantsign solutions of systems of integral equations.
Agarwal, Ravi P. and O'Regan, Donal and Wong, Patricia J. Y. (2013) Constantsign solutions of systems of integral equations. : Springer, Cham. [DOI] [Details] 
Conference Publications
Year  Publication  

(2007)  Fixed Point Theory and Applications
OREGAN, D. et al. (2007) Fixed point theory for generalized contractive maps on spaces with vectorvalued metrics Fixed Point Theory and Applications , pp.143149 [Details] 

(2001)  FIXED POINT THEORY AND APPLICATIONS
OREGAN, D. et al. (2001) Essential upper semicontinuous compact maps on normal topological vector spaces which have the fixed point property FIXED POINT THEORY AND APPLICATIONS , pp.1725 [Details] 

(1997)  COMPUTATIONAL MECHANICS
OREGAN, T.L. et al. (1997) Void growth simulations in single crystals COMPUTATIONAL MECHANICS , pp.115121 [Details] 

(1997)  NONLINEAR ANALYSISTHEORY METHODS & APPLICATIONS
OREGAN, D. et al. (1997) Random fixed point theory with applications NONLINEAR ANALYSISTHEORY METHODS & APPLICATIONS , pp.32953299 [Details] 

(1996)  FRONTIERS FOR ENGINEERING MATERIALS
OREGAN, T.L. et al. (1996) Finite deformation FE simulations in metals using remeshing FRONTIERS FOR ENGINEERING MATERIALS , pp.171178 [Details] 

(1994)  PROCEEDINGS OF THE FOURTH INTERNATIONAL COLLOQUIUM ON DIFFER
OREGAN, D. et al. (1994) Existence theory for singular two point boundary value problems PROCEEDINGS OF THE FOURTH INTERNATIONAL COLLOQUIUM ON DIFFER , pp.215228 [Details] 
Editorial
Year  Publication  

(2007)  The role of CT scan in reversible airflow obstruction.
O'Regan, A (2007) The role of CT scan in reversible airflow obstruction. Editorial [Details] 
Letter
Year  Publication  

(2006)  Asbestos exposure and serum osteopontin.
O'Regan, AW,Serlin, D,Berman, JS (2006) Asbestos exposure and serum osteopontin. Letter [Details] 