Uniqueness questions for C*-norms on group rings
arXiv:1806.10983 · doi:10.2140/pjm.2019.298.257
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 Rørdam.
9 pages