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    Author
    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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    Singular boundary value problems for ordinary differential equations 

    Nieto, Juan J.; O'Regan, Donal (Springer Nature, 2009-01-01)
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    Generalized coincidence theory for set-valued maps 

    O'Regan, Donal (International Scientific Research Publications MY SDN. BHD., 2017-03-04)
    This paper presents a coincidence theory for general classes of maps based on the notion of a Phi-essential map (we will also discuss Phi-epi maps). (C)2017 All rights reserved.
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    Fixed point theorems for generalized contractions in ordered metric spaces 

    O'Regan, Donal; Petruşel, Adrian (Elsevier BV, 2008-05-01)
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    Oscillation criteria for solutions to nonlinear dynamic equations of higher order 

    O'Regan, Donal (Hacettepe Journal of Mathematics and Statistics, 2016-01-01)
    In this paper using some new dynamic inequalities we present some oscillation results for higher order dynamic equation {r(n-1) (t) phi(alpha n-1) [(r(n-2) (t) (...(r(1) (t) phi(alpha 1) [x(Delta) (t)])(Delta) ...)(Delta ...
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    Variational methods and critical point theory 

    Otero-Espinar, M. Victoria; Nieto, Juan J.; O'Regan, Donal; Perera, Kanishka (Hindawi Limited, 2012-01-01)
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    Homoclinic orbits for a singular second-order neutral differential equation 

    Guo, Chengjun; O'Regan, Donal; Xu, Yuantong; Agarwal, Ravi P. (Elsevier BV, 2010-06-01)
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