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arxiv: 0906.0656 · v2 · pith:ZR4BR6H4new · submitted 2009-06-03 · 🧮 math.OA · math.QA

On the zeroth L²-homology of a quantum group

classification 🧮 math.OA math.QA
keywords groupquantumzerothhomologyalgebrabetticoamenablecompact
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We prove that the zeroth L^2-Betti number of a compact quantum group vanishes unless the underlying C*-algebra is finite dimensional and that the zeroth L^2-homology itself is non-trivial exactly when the quantum group is coamenable.

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