An inner amenable group whose von Neumann algebra does not have property Gamma.

Wed, 09/09/2009 - 22:08 — SomNambul

Authors: Stefaan Vaes
Subjects: Operator Algebras

link: http://arxiv.org/abs/0909.1485
Abstract

We construct inner amenable groups G with infinite conjugacy classes and such
that the associated II_1 factor does not have property Gamma of Murray and von
Neumann. This solves a problem posed by Effros in 1975.

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An inner amenable group whose von Neumann algebra does not have property Gamma.

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