Nonlinear classification of Banach spaces

by Randrianarivony, Nirina Lovasoa

Abstract (Summary)
We study the geometric classi?cation of Banach spaces via Lipschitz, uniformly continuous, and coarse mappings. We prove that a Banach space which is uniformly homeomorphic to a linear quotient of lp is itself a linear quotient of lp when p<2. We show that a Banach space which is Lipschitz universal for all separable metric spaces cannot be asymptotically uniformly convex. Next we consider coarse embedding maps as de?ned by Gromov, and show that lp cannot coarsely embed into a Hilbert space when p> 2. We then build upon the method of this proof to show that a quasi-Banach space coarsely embeds into a Hilbert space if and only if it is isomorphic to a subspace of L0(??) for some probability space (?,B,??).
Bibliographical Information:

Advisor:Johnson, William B.; Boas, Harold; Caton, Jerald; Sivakumar, N.

School:Texas A&M University

School Location:USA - Texas

Source Type:Master's Thesis

Keywords:nonlinear maps banach spaces


Date of Publication:08/01/2005

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