Displaying similar documents to “Simmetria delle soluzioni di equazioni ellittiche semilineari in R N

On the existence of infinitely many solutions for a class of semilinear elliptic equations in R N

Francesca Alessio, Paolo Caldiroli, Piero Montecchiari (1998)

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

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We show, by variational methods, that there exists a set A open and dense in a L R N : a 0 such that if a A then the problem - u + u = a x u p - 1 u , u H 1 R N , with p subcritical (or more general nonlinearities), admits infinitely many solutions.

Extremal solutions and relaxation for second order vector differential inclusions

Evgenios P. Avgerinos, Nikolaos S. Papageorgiou (1998)

Archivum Mathematicum

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In this paper we consider periodic and Dirichlet problems for second order vector differential inclusions. First we show the existence of extremal solutions of the periodic problem (i.e. solutions moving through the extreme points of the multifunction). Then for the Dirichlet problem we show that the extremal solutions are dense in the C 1 ( T , R N ) -norm in the set of solutions of the “convex” problem (relaxation theorem).

Periodic solutions for differential inclusions in N

Michael E. Filippakis, Nikolaos S. Papageorgiou (2006)

Archivum Mathematicum

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We consider first order periodic differential inclusions in N . The presence of a subdifferential term incorporates in our framework differential variational inequalities in N . We establish the existence of extremal periodic solutions and we also obtain existence results for the “convex” and “nonconvex”problems.