On the Solvability of Inclusions with Multivalued Compact Perturbations of Bi-Mappings

Abstract

This paper is about the solvability of the inclusion $$A(u,u) + F(u) \ni L , $$ where X is a reflexive Banach space, L ∈ X∗, A is maximal monotone in one argument and continuous in the other argument in certain sense, and F is a multivalued perturbing term, which is compact in certain sense. We are interested in appropriate conditions on A and F such that this inclusion has solutions within a closed and convex set. We also prove that under such conditions the mapping u ↦ A (u, u) + F(u) is in fact generalized pseudomonotone in the sense of Browder and Hess (J. Funct. Anal. 11, 251–294, 1972).