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Continuous selections and reflexive Banach spaces
Authors:Valentin Gutev  Stoyan Nedev
Institution:School of Mathematical and Statistical Sciences, Faculty of Science, University of Natal, King George V Avenue, Durban 4041, South Africa ; Institute of Mathematics, Bulgarian Academy of Sciences, Acad. G. Bontchev Str., bl. 8, 1113 Sofia, Bulgaria
Abstract:

Every l.s.c. mapping $\Phi$ from a space $X$ into the non-empty closed convex subsets of a reflexive Banach space $Y$ admits a continuous selection provided it satisfies a ``weak' u.s.c. condition. This result partially generalizes some known selection theorems. Also, it is successful in solving a problem concerning the set of proper lower semi-continuous convex functions on a reflexive Banach space.

Keywords:Set-valued mapping  selection  lower semi-continuous  weakly continuous  hyperspace topology  convex function
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