The fixed point property via dual space properties

Details The fixed point property via dual space properties The fixed point property via dual space properties

2008-04-03

arxiv.org/abs/0804.0601v2

Mathematics

Functional Analysis

(couple of typos corrected)

Scientific paper

A Banach space has the weak fixed point property if its dual space has a weak$^*$ sequentially compact unit ball and the dual space satisfies the weak$^*$ uniform Kadec-Klee property; and it has the \fpp if there exists $\epsilon>0$ such that, for every infinite subset $A$ of the unit sphere of the dual space, $A\cup (-A)$ fails to be $(2-\epsilon)$-separated. In particular, $E$-convex Banach spaces, a class of spaces that includes the uniformly nonsquare spaces, have the fixed point property.

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