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math.OA2024
Note on C*-algebras associated to boundary actions of hyperbolic 3-manifold groups
Shirly Geffen, Julian Kranz
Using Kirchberg-Phillips' classification of purely infinite C*-algebras by K-theory, we prove that the isomorphism types of crossed product C*-algebras associated to certain hyperb…
math.OA2024
Actions on classifiable C*-algebras without equivariant property (SI)
Eusebio Gardella, Julian Kranz, Andrea Vaccaro
We exhibit examples of actions of countable discrete groups on both simple and non-simple nuclear stably finite C*-algebras that are tracially amenable but not amenable. We further…