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23 - Haagerup’s characterizations of the WEP

Published online by Cambridge University Press:  10 February 2020

Gilles Pisier
Affiliation:
Texas A & M University
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Summary

This chapter starts with an overview of the complex interpolation method, for pairs of Banach spaces. Our main application here is when the pair is formed of the same space X with two equivalent norms. Fix an integer n. We consider a C*-algebra A and the space X formedof n-tuples in A equipped with two norms: the row-norm and the column-norm. In that case we prove a remarkable formula identifying the interpolated norm of parameter 1/2 (the midpoint of the interpolation scale). The latter formula involves the maximal tensor product of A with its complex conjugate. This is a preparation for the next chapter.

Type
Chapter
Information
Tensor Products of C*-Algebras and Operator Spaces
The Connes–Kirchberg Problem
, pp. 384 - 409
Publisher: Cambridge University Press
Print publication year: 2020

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