On co-amenability for groups and von Neumann algebras
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🧮 math.GR
math.OA
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co-amenabilityalgebrasneumannaddressansweringaskeddescribingeymard
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We first show that co-amenability does not pass to subgroups, answering a question asked by Eymard in 1972. We then address co-amenability for von Neumann algebras, describing notably how it relates to the former.
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