Exactness and uniform embeddability of discrete groups

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We define a numerical quasi-isometry invariant of a finitely generated group, whose values parametrize the difference between the group being uniformly embeddable in a Hilbert space and the reduced C*-algebra of the group being exact.
20 pages, Latex

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Operator Algebras, Group Theory, 46L05;20F65

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http://salesiana.dossiersoluciones.com/handle/123456789/68522

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/math/0309166
 http://arxiv.org/abs/math/0309166

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arXiv