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A CODING OF BUNDLE GRAPHS AND THEIR EMBEDDINGS INTO BANACH SPACES

Part of: Normed linear spaces and Banach spaces; Banach lattices Graph theory

Published online by Cambridge University Press:  06 August 2018

Andrew Swift
Andrew Swift*
Affiliation:
Texas A&M University, College Station, TX 77843, U.S.A. email ats0@math.tamu.edu
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Abstract

The purpose of this article is to generalize some known characterizations of Banach space properties in terms of graph preclusion. In particular, it is shown that superreflexivity can be characterized by the non-equi-bi-Lipschitz embeddability of any family of bundle graphs generated by a non-trivial finitely branching bundle graph. It is likewise shown that asymptotic uniform convexifiability can be characterized within the class of reflexive Banach spaces with an unconditional asymptotic structure by the non-equi-bi-Lipschitz embeddability of any family of bundle graphs generated by a non-trivial $\aleph _{0}$-branching bundle graph. For the specific case of $L_{1}$, it is shown that every countably branching bundle graph bi-Lipschitzly embeds into $L_{1}$ with distortion no worse than $2$.

MSC classification

Primary: 46B85: Embeddings of discrete metric spaces into Banach spaces; applications in topology and computer science
Secondary: 46B06: Asymptotic theory of Banach spaces 46B07: Local theory of Banach spaces 05C78: Graph labelling (graceful graphs, bandwidth, etc.)
Type
Research Article
Information
Mathematika , Volume 64 , Issue 3 , 2018 , pp. 847 - 874
Copyright
Copyright © University College London 2018 

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