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arxiv: 0908.1173 · v2 · pith:2QTKEQEMnew · submitted 2009-08-08 · 🧮 math.FA · math.DS· math.GR

Hilbert C*-modules and amenable actions

classification 🧮 math.FA math.DSmath.GR
keywords actionsgroupshilbertmodulesamenableclosecompactdiscrete
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We study actions of discrete groups on Hilbert $C^*$-modules induced from topological actions on compact Hausdorff spaces. We show non-amenability of actions of non-amenable and non-a-T-menable groups, provided there exists a quasi-invariant probability measure which is sufficiently close to being invariant.

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