7 citations · 8 across the 2 of their papers we have counts for
5 papers · 1 filter
Cohomological obstructions to lifting properties for full group C-algebras
Adrian Ioana, Pieter Spaas, Matthew Wiersma
We develop a new method, based on non-vanishing of second cohomology groups, for proving the failure of lifting properties for full C-algebras of countable groups with (relativ…
Kirchberg's factorization property for locally compact groups
Matthew Wiersma
A locally compact group has the factorization property if the map is continuous with respect to the mi…
Existence of tracial states on reduced group C*-algebras
Brian E. Forrest, Nico Spronk, Matthew Wiersma
Let be a locally compact group. It is not always the case that its reduced C*-algebra admits a tracial state. We exhibit closely related necessary and sufficient con…
Weak containment by restrictions of induced representations
Matthew Wiersma
A QSIN group is a locally compact group whose group algebra admits a quasi-central bounded approximate identity. Examples of QSIN groups include every amenable group a…
Weak* tensor products for von Neumann algebras
Matthew Wiersma
The category of -algebras is blessed with many different tensor products. In contrast, virtually the only tensor product ever used in the category of von Neumann algebras is t…