Every nonreflexive subspace of L_1[0,1] fails the fixed point property

Details Every nonreflexive subspace of L_1[0,1] fails the fixed point property Every nonreflexive subspace of L_1[0,1] fails the fixed point property

1993-02-04

arxiv.org/abs/math/9302208v1

Mathematics

Functional Analysis

Scientific paper

The main result of this paper is that every non-reflexive subspace $Y$ of $L_1[0,1]$ fails the fixed point property for closed, bounded, convex subsets $C$ of $Y$ and nonexpansive (or contractive) mappings on $C$. Combined with a theorem of Maurey we get that for subspaces $Y$ of $L_1[0,1]$, $Y$ is reflexive if and only if $Y$ has the fixed point property. For general Banach spaces the question as to whether reflexivity implies the fixed point property and the converse question are both still open.

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