Matthew Wiersma

activity

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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3 papers · 1 filter

math.OA2017

Kirchberg's factorization property for locally compact groups

Matthew Wiersma

A locally compact group $G$ has the factorization property if the map $C^{*} (G) ⊙ C^{*} (G) ∋ a \otimes b \mapsto λ (a) ρ (b) \in B (L^{2} (G))$ is continuous with respect to the mi…

math.OA2017★ 7 cited

Existence of tracial states on reduced group C*-algebras

Brian E. Forrest, Nico Spronk, Matthew Wiersma

Let $G$ be a locally compact group. It is not always the case that its reduced C*-algebra $C_{r}^{*} (G)$ admits a tracial state. We exhibit closely related necessary and sufficient con…

math.OA2017

Weak containment by restrictions of induced representations

Matthew Wiersma

A QSIN group is a locally compact group $G$ whose group algebra $L^{1} (G)$ admits a quasi-central bounded approximate identity. Examples of QSIN groups include every amenable group a…