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A characterization of reflexive Banach spaces
Authors:Eva Matousková     Charles Stegall
Affiliation:Department of Mathematical Analysis, Charles University, Sokolovská 83, CZ-18600 Prague, Czech Republic ; Institut für Mathematik, Johannes Kepler Universität, Altenbergerstraße, A-4040 Linz, Austria
Abstract:A Banach space $Z$ is not reflexive if and only if there exist a closed separable subspace $X$ of $Z$ and a convex closed subset $Q$ of $X$ with empty interior which contains translates of all compact sets in $X$. If, moreover, $Z$ is separable, then it is possible to put $X=Z$.

Keywords:Banach spaces   reflexivity   convexity
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