Dr. Rahel Brugger
Technische Universität Dresden
We show a rigidity result for subfactors that are normalized by a representation of a lattice Γ in a higher rank simple Lie group with trivial center into a finite factor. This implies that every subfactor of LΓ which is normalized by the natural copy of Γ is trivial or of finite index.
2Asymptotic geometry of sofic groups and manifolds