Speaker: Hiroshi Ando (IHES)
Title: Ultraproducts of von Neumann algebras
Date/Time: March 18 (Mon.), 2013, 4:30-6:00
Room: 118 Math. Sci. Building
Abstract: Unlike the case of tracial ultraproduct, there are several notions of ultraproducts/central sequences of general von Neumann algebras (Connes's asymptotic centralizer, Ocneanu's ultraproduct/central sequence algebras, Groh-Raynaud ultraproduct). In this talk we explain the relationships among them from a unified viewpoint, and show several phenomena which do not appear in the tracial ultraproducts.