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    O'Regan, Donal (126)
    Agarwal, Ravi P. (51)Agarwal, Ravi P (7)Agarwal, RaviP (5)Jiang, Daqing (4)... View MoreSubjectexistence (32)boundary-value-problems (16)positive solutions (15)differential-equations (14)equations (7)... View MoreDate Issued2010 - 2017 (29)2000 - 2009 (69)1992 - 1999 (28)TypeArticle (126)

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    Fixed point theorems for nonlinear operators 

    O'Regan, Donal (Elsevier BV, 1996-09-01)
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    Boundary value problems singular in the solution variable with nonlinear boundary data 

    O'Regan, Donal (Cambridge University Press (CUP), 1996-10-01)
    Existence results are established for the equation y '' +f(t, y) = 0, 0 < t < 1. Here f may be singular in y and f is allowed to change sign. Our boundary data include y(0) = y'(1) + ky(1) = 0, k > -1 and y(0) = ...
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    Bobisud, L. E.; O'Regan, Donal (American Mathematical Society (AMS), 1996-07-01)
    We prove the existence of nonnegative solutions of the problem (py')'/p + mu qg(x, y) = 0, lim(x-->0+)py' = 0, h(y'(1)) + y(1) = 0 for a physically motivated class of nonlinearity h. The results, which are established ...
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    O'Regan, Donal (American Mathematical Society (AMS), 1997-03-01)
    Fixed point theory is presented for compact u.s.c. and l.s.c. set valued maps.
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    Time scale boundary value problems on infinite intervals 

    Agarwal, Ravi P.; Bohner, Martin; O'Regan, Donal (Elsevier BV, 2002-04-01)
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    Existence and multiplicity of solutions for some three-point nonlinear boundary value problems 

    Xian, Xu; O'Regan, Donal (Springer Nature, 2006-01-01)
    We study the existence and multiplicity of solutions for the three-point nonlinear boundary value problem u '' ( t) +lambda a(t) f (u) = 0, 0 < t < 1; u( 0) = 0 = u(1)-gamma u(eta), where eta is an element of (0,1), ...
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    Positive solvability of systems of nonlinear hammerstein integral equations 

    Yang, Zhilin; O'Regan, Donal (Elsevier BV, 2005-11-01)
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    Dynamic equations on time scales: a survey 

    Agarwal, Ravi; Bohner, Martin; O'Regan, Donal; Peterson, Allan (Elsevier BV, 2002-04-01)
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    Existence theory for single and multiple solutions to singular positone boundary value problems 

    Agarwal, Ravi P.; O'Regan, Donal (Elsevier BV, 2001-09-01)
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    O'Regan, Donal (American Mathematical Society (AMS), 1996-02-01)
    The Schauder Tychonoff theorem in a locally convex topological space is used to establish existence results for Volterra-Hammmerstein and Hammerstein integral equations in a reflexive Banach space.
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