The property WORTH* and the weak fixed point property

Article


Dalby, Tim. 2014. "The property WORTH* and the weak fixed point property." Journal of Nonlinear and Convex Analysis. 15 (5), pp. 919-927.
Article Title

The property WORTH* and the weak fixed point property

ERA Journal ID261
Article CategoryArticle
Authors
AuthorDalby, Tim
Journal TitleJournal of Nonlinear and Convex Analysis
Journal Citation15 (5), pp. 919-927
Number of Pages9
Year2014
Place of PublicationYokohama, Japan
ISSN1345-4773
1880-5221
Web Address (URL)http://www.ybook.co.jp/online2/jncav15.html
Abstract

A Banach space, $X$, has the weak fixed point property (w-FPP) if every nonexpansive mapping, $T$, on every weak compact convex nonempty subset, $C$, has a fixed point. A Banach space, $X^*$, has WORTH* if for every weak* null sequence $(x^*_n)$ and every $x^* \in X^*$,

\[\limsup_n\|x^*_n-x^*\|=\limsup_n\|x^*_n+x^*\|.\]

A new proof is given of the recent result that WORTH* implies the weak fixed point property.

Keywordsproperties WORTH; WORTH*; weak fixed point property; 1-unconditional basis
ANZSRC Field of Research 2020490408. Operator algebras and functional analysis
490201. Algebraic structures in mathematical physics
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Byline AffiliationsOpen Access College
Institution of OriginUniversity of Southern Queensland
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