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

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

2009-09-08

arxiv.org/abs/0909.1485v1

Mathematics

Operator Algebras

Scientific paper

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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