Existence of solutions for hyperbolic differential inclusions in Banach spaces
Nikolaos S. Papageorgiou (1992)
Archivum Mathematicum
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In this paper we examine nonlinear hyperbolic inclusions in Banach spaces. With the aid of a compactness condition involving the ball measure of noncompactness we prove two existence theorems. The first for problems with convex valued orientor fields and the second for problems with nonconvex valued ones.