Browsing by Author "O’REGAN, DONAL"
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Fixed point theory for various classes of inward multivalued maps
AGARWAL, RAVI P.; O’REGAN, DONAL (Cambridge University Press (CUP), 2009-10-21)In this paper we present new fixed point theorems for inward and weakly inward type maps between Frechet spaces. We also discuss Kakutani-Monch and contractive type maps. -
Impulsive periodic solutions for singular problems via variational methods
SUN, JUNTAO; O’REGAN, DONAL (Cambridge University Press (CUP), 2012-02-16)In this paper we study impulsive periodic solutions for second-order nonautonomous singular differential equations. Our proof is based on the mountain pass theorem. Some recent results in the literature are extended. -
On a perturbed conservative system of semilinear wave equations with periodic-dirichlet boundary conditions
CHEN, JINHAI; O’REGAN, DONAL (Cambridge University Press (CUP), 2010-01-13)In this paper, some existence and uniqueness results for generalized solutions to a periodic-Dirichlet problem for semilinear wave equations are given, using a global inverse function theorem. These results extend those ...