Matthew Wiersma

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20112025

most citedC*-norms for tensor products of discrete group C*-algebras

11 citations · 35 across the 11 of their papers we have counts for

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math.OA2014★ 11 cited

C-norms for tensor products of discrete group C-algebras

Matthew Wiersma

Let $Γ$ be a discrete group. We show that if $Γ$ is nonamenable, then the algebraic tensor products $C_{r}^{*} (Γ) \otimes C_{r}^{*} (Γ)$ and $C^{*} (Γ) \otimes C_{r}^{*} (Γ)$ do not admit unique $C^*…

math.OA2014★ 3 cited

Exotic group C*-algebras

Matthew Wiersma

Let $Γ$ be a discrete group. When $Γ$ is nonamenable, the reduced and full group $C$ *-algebras differ and it is generally believed that there should be many intermediate $C$ *-algeb…