Matthew Wiersma

collaborators

3 papers

math.FA2026

On operator Connes-amenability of the Fourier-Stieltjes algebra

Volker Runde, Nico Spronk, Matthew Wiersma

Runde and Spronk showed in 2004 that there are non-amenable groups $G$ , including $F_{2}$ , {whose Fourier-Stieltjes algebra, $B (G)$ ,} is operator Connes-amenable. This result…

math.DS2026

Entropies and Poisson boundaries of random walks on groups with rapid decay

Benjamin Anderson-Sackaney, Tim de Laat, Ebrahim Samei +1

Let $G$ be a countable group and $I^¼$ a probability measure on $G$ . We build a new framework to compute asymptotic quantities associated with the $I^¼$ -random walk on $G$ , using met…

math.OA2024

New tensor products of C-algebras and characterization of type I C-algebras as rigidly symmetric C*-algebras

Hun Hee Lee, Ebrahim Samei, Matthew Wiersma

We construct several new classes of bifunctors $(A, B) \mapsto A \otimes_{I^} \pm B$ , where $A \otimes_{I^} \pm B$ is a cross norm completion of $A ⊙ B$ for each pair of C*-algebras $A$ and $B$ .…

On operator Connes-amenability of the Fourier-Stieltjes algebra

Entropies and Poisson boundaries of random walks on groups with rapid decay

New tensor products of C*-algebras and characterization of type I C*-algebras as rigidly symmetric C*-algebras

New tensor products of C-algebras and characterization of type I C-algebras as rigidly symmetric C*-algebras