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An asymptotic property of Schachermayer's space under renorming

Denka Kutzarova·Denny H. Leung
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Abstract

A Banach space X with closed unit ball B is said to have property 2-beta, repsectively 2-NUC if for every \ep > 0, there exists δ> 0 such that for every \ep-separated sequence (x_n) in the unit ball B, and every x in B, there are distinct indices m and n such that ||x + x_m + x_n|| < 3(1 - δ), respectively, ||x_m + x_n|| < 2(1 - δ). It is shown that a Banach space constructed by Schachermayer has property 2-beta but cannot be renormed to have property 2-NUC.

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Denka Kutzarova, Denny H. Leung. 1999-11-06. An asymptotic property of Schachermayer's space under renorming. https://arxiv.org/abs/math/9911037

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