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arxiv: 1706.05903 · v1 · pith:NK7VTBQOnew · submitted 2017-06-19 · 🧮 math.OA · math.GR

Traces on reduced group C*-algebras

classification 🧮 math.OA math.GR
keywords groupreducedadmitsalgebraalgebrasamenableanswerscompact
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In this short note we prove that the reduced group C*-algebra of a locally compact group admits a non-zero trace if and only if the amenable radical of the group is open. This completely answers a question raised by Forrest, Spronk and Wiersma.

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