3 papers
math.OA2026
W*-superrigidity for discrete quantum groups
Milan Donvil, Stefaan Vaes
A discrete group is called W*-superrigid if the group can be entirely recovered from the ambient group von Neumann algebra . We introduce an analogous notion for disc…
math.OA2025
W*-superrigidity for groups with infinite center
Milan Donvil, Stefaan Vaes
We construct discrete groups with infinite center that are nevertheless W*-superrigid, meaning that the group von Neumann algebra fully remembers the group . We obtai…
math.OA2025
W*-superrigidity for cocycle twisted group von Neumann algebras
Milan Donvil, Stefaan Vaes
We construct countable groups with the following new degree of W*-superrigidity: if is virtually isomorphic, in the sense of admitting a bifinite bimodule, with any othe…