Operator Algebra Seminars of the University of Tokyo

• Speaker: Kohki Sakamoto (the University of Tokyo)
• Title: On the spectral gap conjecture for pairs in SU(2)
• Date/Time: April 7 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

• Speaker: Akihiko Arai (Chiba University)
• Title: On the isomorphism problem for ultraproducts of C*-algebras in continuous model theory
• Date/Time: April 14 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

• Speaker: Ayoub Hafid (the University of Tokyo)
• Title: Concepts of coarse geometry on quantum metric spaces
• Date/Time: April 21 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

• Speaker: Roozbeh Hazrat (Western Sydney University)
• Title: An attempt to classify combinatorial algebras
• Date/Time: April 28 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

• Speaker: Camila Sehnem (RIMS, Kyoto University)
• Title: Injective envelopes for partial C*-dynamical systems
• Date/Time: May 12 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

• Speaker: Hiroro Kamikawa (Kyoto University)
• Title: TBA
• Date/Time: May 19 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

• Speaker: Takumi Nishihara (RIMS, Kyoto University)
• Title: Compact group actions and G-kernels on von Neumann algebras
• Date/Time: May 26 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

• Speaker: Yusuke Nishinaka (Nagoya University)
• Title: Costello-Gwilliam factorization algebras and vertex algebras
• Date/Time: June 2 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

• Speaker: Taisuke Hoshino (the University of Tokyo)
• Title: Rigidity for graph-wreath product II₁ factors
• Date/Time: June 9 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

• Speaker: Hiroki Ishikura (RIMS, Kyoto University)
• Title: Borel planar complexes and soficity
• Date/Time: June 16 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

We have no seminar on June 30, since we have The China-Japan-Korea Conference on Functional Analysis 2026 at the University of Tokyo.

• Speaker: Nanami Hashimoto (Keio University)
• Title: Equivalence of categories of KK-theory or E-theory for C*-algebras over topological spaces by reflection functors
• Date/Time: July 7 (Tue), 2026, 4:45-6:15pm
• Room: 126 Math. Sci. Building

The seminar days have moved to Tuesdays (16:45-18:15) since April, 2021.

If you would like to give a talk or know someone who would like to give a talk, please contact Kawahigashi or Kida.

Records of past seminars.

(Seminar announcements in Japanese)

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