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Relative inner amenability and relative property gamma

2016-11-2, Jolissaint, Paul

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Haagerup approximation property for finite von Neumann algebras

2002, Jolissaint, Paul

We study finite von Neumann algebras M that admit an approximate identity made with completely positive normal maps whose extention to L-2(M) are compact operators. We prove heredity results, and we state sufficient conditions on actions of countable groups to ensure that the crossed product algebras have the same property.