Existence and Relaxation Results for Non
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Nikolaos Halidias; Nikolaos S Papageorgiou
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Article
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1998
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Elsevier Science
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English
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In this paper we study second order differential inclusions with nonlinear boundary conditions. Our formulation is general and incorporates as special cases wellknown problems such as the Dirichlet (Picard), Neumann, and periodic problems. We prove existence theorems under various sets of hypotheses