3 papers
math.OA2025
Simplicity of crossed products by FC-hypercentral groups
Shirly Geffen, Dan Ursu
In this paper, we give a complete, two-way characterization, of when a noncommutative crossed product is simple, in the case of being an FC-hypercentral group.…
math.OA2024
The ideal intersection property for essential groupoid C*-algebras
Matthew Kennedy, Se-Jin Kim, Xin Li +2
We characterise, in several complementary ways, étale groupoids with locally compact Hausdorff space of units whose essential groupoid C*-algebra has the ideal intersection proper…
math.OA2024
Intermediate subalgebras for reduced crossed products of discrete groups
Matthew Kennedy, Dan Ursu
Let be an action of a discrete group on a unital C*-algebra by *-automorphisms and let denote the corresponding reduced c…