Donal O'Regan Vis

*	2009
39	EE	Ravi P. Agarwal, Donal O'Regan, Veli B. Shakhmurov: Higher order nonlinear degenerate differential operator equations. Appl. Math. Lett. 22(10): 1556-1561 (2009)
38	EE	Said R. Grace, Ravi P. Agarwal, Donal O'Regan: A selection of oscillation criteria for second-order differential inclusions. Appl. Math. Lett. 22(2): 153-158 (2009)
37	EE	Fulong Wang, Yuqing Chen, Donal O'Regan: Degree theory for monotone type mappings in non-reflexive Banach spaces. Appl. Math. Lett. 22(2): 276-279 (2009)
36	EE	A. P. Farajzadeh, A. Amini-Harandi, Donal O'Regan, Ravi P. Agarwal: New kinds of generalized variational-like inequality problems in topological vector spaces. Appl. Math. Lett. 22(7): 1126-1129 (2009)
35	EE	Yuqing Chen, Donal O'Regan: On the homotopy property of topological degree for maximal monotone mappings. Applied Mathematics and Computation 208(2): 373-377 (2009)
34	EE	Ravi P. Agarwal, Donal O'Regan, Veli B. Shakhmurov: B-Separable boundary value problems in Banach-valued function spaces. Applied Mathematics and Computation 210(1): 48-63 (2009)
33	EE	Yan Sun, Yeol Je Cho, Donal O'Regan: Positive solutions for singular second order Neumann boundary value problems via a cone fixed point theorem. Applied Mathematics and Computation 210(1): 80-86 (2009)
32	EE	Fulong Wang, Yuqing Chen, Donal O'Regan: Generalized degree for classes of finite dimensional upper hemi-continuous mappings in separable Banach spaces. Applied Mathematics and Computation 211(1): 173-176 (2009)
	2008
31	EE	Li Zu, Daqing Jiang, Donal O'Regan: Existence theory for multiple solutions to semipositone Dirichlet boundary value problems with singular dependent nonlinearities for second-order impulsive differential equations. Applied Mathematics and Computation 195(1): 240-255 (2008)
30	EE	Donal O'Regan, Reza Saadati: Nonlinear contraction theorems in probabilistic spaces. Applied Mathematics and Computation 195(1): 86-93 (2008)
29	EE	Ravi P. Agarwal, Donal O'Regan, S. H. Saker: Oscillation and global attractivity in a delay periodic host macroparasite model. Applied Mathematics and Computation 196(1): 340-352 (2008)
28	EE	Sinisa N. Jesic, Donal O'Regan, Natasa A. Babacev: A common fixed point theorem for R-weakly commuting mappings in probabilistic spaces with nonlinear contractive conditions. Applied Mathematics and Computation 201(1-2): 272-281 (2008)
27	EE	Fulong Wang, Yuqing Chen, Donal O'Regan: Degree theory for (S+) mappings in non-reflexive banach spaces. Applied Mathematics and Computation 202(1): 229-232 (2008)
26	EE	Chengjun Yuan, Daqing Jiang, Donal O'Regan: Existence and uniqueness of positive solutions for fourth-order nonlinear singular continuous and discrete boundary value problems. Applied Mathematics and Computation 203(1): 194-201 (2008)
25	EE	Donal O'Regan: Singular integral equations arising in draining and coating flows. Applied Mathematics and Computation 205(1): 438-441 (2008)
	2007
24	EE	Donal O'Regan, Ravi P. Agarwal, Kanishka Perera: Nonlinear integral equations singular in the dependent variable. Appl. Math. Lett. 20(11): 1137-1141 (2007)
23	EE	Ravi P. Agarwal, Donal O'Regan: Second order initial value problems of Lane-Emden type. Appl. Math. Lett. 20(12): 1198-1205 (2007)
22	EE	Donal O'Regan, Miroslawa Zima: Leggett-Williams norm-type fixed point theorems for multivalued mappings. Applied Mathematics and Computation 187(2): 1238-1249 (2007)
	2006
21	EE	Ravi P. Agarwal, Donal O'Regan: Leray-Schauder and Krasnoselskii results for multivalued maps defined on pseudo-open subsets of a Fréchet space. Appl. Math. Lett. 19(12): 1327-1334 (2006)
20	EE	Donal O'Regan: Leray-Schauder results for inward acyclic and approximable maps defined on Fréchet spaces. Appl. Math. Lett. 19(9): 976-982 (2006)
19	EE	H. Adibi, Yeol Je Cho, Donal O'Regan, Reza Saadati: Common fixed point theorems in S-fuzzy metric spaces. Applied Mathematics and Computation 182(1): 820-828 (2006)
	2005
18	EE	Ravi P. Agarwal, Donal O'Regan: A note on the topological transversality theorem for acyclic maps. Appl. Math. Lett. 18(1): 17-22 (2005)
17	EE	Ravi P. Agarwal, Donal O'Regan: Homotopy and normalization properties for admissible maps. Appl. Math. Lett. 18(1): 33-40 (2005)
16	EE	Yuqing Chen, Yeol Je Cho, Donal O'Regan: On perturbations of accretive mappings. Appl. Math. Lett. 18(7): 775-781 (2005)
15	EE	Ravi P. Agarwal, Donal O'Regan: A multiplicity result for second order impulsive differential equations via the Leggett Williams fixed point theorem. Applied Mathematics and Computation 161(2): 433-439 (2005)
14	EE	Daqing Jiang, Donal O'Regan, Ravi P. Agarwal: Optimal existence theory for single and multiple positive periodic solutions to functional difference equations. Applied Mathematics and Computation 161(2): 441-462 (2005)
13	EE	Haishen Lü, Donal O'Regan, Ravi P. Agarwal: Positive solutions for singular p-Laplacian equations with sign changing nonlinearities using inequality theory. Applied Mathematics and Computation 165(3): 587-597 (2005)
12	EE	Ravi P. Agarwal, Donal O'Regan, V. Lakshmikantham, S. Leela: Nonresonant singular boundary value problems with sign changing nonlinearities. Applied Mathematics and Computation 167(2): 1236-1248 (2005)
11	EE	Ravi P. Agarwal, Donal O'Regan, V. Lakshmikantham: Viability theory and fuzzy differential equations. Fuzzy Sets and Systems 151(3): 563-580 (2005)
	2004
10	EE	Ravi P. Agarwal, Said R. Grace, Donal O'Regan: Semipositone higher-order differential equations. Appl. Math. Lett. 17(2): 201-207 (2004)
9	EE	Daniel Franco, Juan J. Nieto, Donal O'Regan: Existence of solutions for first order ordinary differential equations with nonlinear boundary conditions. Applied Mathematics and Computation 153(3): 793-802 (2004)
8	EE	Daqing Jiang, Wenjie Zuo, Donal O'Regan, Ravi P. Agarwal: Optimal existence conditions for second order periodic solutions of delay differential equations with upper and lower solutions in the reverse order. Int. J. Comput. Math. 81(6): 707-717 (2004)
	2003
7	EE	Ravi P. Agarwal, Donal O'Regan: Fixed-point theorems for S-KKM maps. Appl. Math. Lett. 16(8): 1257-1264 (2003)
6	EE	Ravi P. Agarwal, Donal O'Regan: An index theory for countably P-concentrative J maps. Appl. Math. Lett. 16(8): 1265-1271 (2003)
	2002
5	EE	Ravi P. Agarwal, Donal O'Regan: Countably P-Concentrative Pairs and the coincidence index. Appl. Math. Lett. 15(4): 439-444 (2002)
4	EE	Marlène Frigon, Donal O'Regan: Fuzzy contractive maps and fuzzy fixed points. Fuzzy Sets and Systems 129(1): 39-45 (2002)
	2001
3	EE	Ravi P. Agarwal, Donal O'Regan: Fixed-point theorems for multivalued maps with closed values on complete gauge spaces. Appl. Math. Lett. 14(7): 831-836 (2001)
2	EE	Ravi P. Agarwal, Donal O'Regan: Variational inequalities, coincidence theory, and minimax inequalities. Appl. Math. Lett. 14(8): 989-996 (2001)
	1999
1	EE	Donal O'Regan, M. Meehan: Periodic and almost periodic solutions of integral equations. Applied Mathematics and Computation 105(2-3): 121-136 (1999)

Coauthor Index

1	H. Adibi	[19]
2	Ravi P. Agarwal	[2] [3] [5] [6] [7] [8] [10] [11] [12] [13] [14] [15] [17] [18] [21] [23] [24] [29] [34] [36] [38] [39]
3	A. Amini-Harandi	[36]
4	Natasa A. Babacev	[28]
5	Yuqing Chen	[16] [27] [32] [35] [37]
6	Yeol Je Cho	[16] [19] [33]
7	A. P. Farajzadeh	[36]
8	Daniel Franco	[9]
9	Marlène Frigon	[4]
10	Said R. Grace	[10] [38]
11	Sinisa N. Jesic	[28]
12	Daqing Jiang	[8] [14] [26] [31]
13	V. Lakshmikantham	[11] [12]
14	S. Leela	[12]
15	Haishen Lü	[13]
16	M. Meehan	[1]
17	Juan J. Nieto	[9]
18	Kanishka Perera	[24]
19	Reza Saadati	[19] [30]
20	S. H. Saker	[29]
21	Veli B. Shakhmurov	[34] [39]
22	Yan Lindsay Sun (Yan Sun)	[33]
23	Fulong Wang	[27] [32] [37]
24	Chengjun Yuan	[26]
25	Miroslawa Zima	[22]
26	Li Zu	[31]
27	Wenjie Zuo	[8]

Colors in the list of coauthors