Uniqueness questions for C*-norms on group rings
classification
🧮 math.OA
math.GR
keywords
groupamenableanswerclasscompletionscomplexdiscreteevidence
read the original abstract
We provide a large class of discrete amenable groups for which the complex group ring has several C*-completions, thus providing partial evidence towards a positive answer to a question raised by Rostislav Grigorchuk, Magdalena Musat and Mikael R{\o}rdam.
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