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Arbitrarily distortable Banach spaces of higher order by Beanland, Kevin; Causey, Ryan; Motakis, Pavlos is a scholarly article available to read on EtoBox.

What is Arbitrarily distortable Banach spaces of higher order about?

We study an ordinal rank on the class of Banach spaces with bases that quantifies the distortion of the norm of a given Banach space. The rank $AD(\cdot)$, introduced by P. Dodos, uses the transfinite Schreier familes and has the property that $AD(X) < \omega_1$ if and only if $X$ is arbitrarily distortable. We prove several properties of this rank as well as some new results concerning higher order $\ell_1$ spreading models. We also compute this rank for for several Banach spaces. In particular, it is shown that class of Banach spaces $\mathfrak{X}^{\omega^\xi}_{0,1}$ , which each admit $\ell_1$ and $c_0$ spreading models hereditarily, and were introduced by S.A. Argyros, the first and third author, satisfy $AD(\mathfrak{X}^{\omega^\xi}_{0,1}) = \omega^\xi + 1$. This answers some questions of Dodos.

Author

Beanland, Kevin; Causey, Ryan; Motakis, Pavlos

Published

2014

Language

EN