Rigidity for Graph Product von Neumann Algebras (Davis)

Rigidity for Graph Product von Neumann Algebras (Davis)

Rigidity for Graph Product von Neumann Algebras (Davis)

Tuesday, January 20, 2026
  • Lecturer: Michael Davis (BGU)
  • Organizer: Orr Shalit and Hridoyananda Saikia
  • Location: Amado 814 and zoom
  • Zoom: Zoom Link
Abstract:
I will discuss joint work with Ionut Chifan and Daniel Drimbe on various rigidity aspects of von Neumann algebras arising from graph product groups whose underlying graph is a certain cycle of cliques and whose vertex groups are wreath-like product property (T) groups. In particular, I will describe all symmetries of these von Neumann algebras by establishing formulas in the spirit of Genevois and Martin’s results on automorphisms of graph product groups. In doing so, I will highlight the methods used from Popa’s deformation/rigidity theory as well as new techniques pertaining to graph product algebras.
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