Operator Algebra Seminars

Seminar information archive ～04/07｜Next seminar｜Future seminars 04/08～

Date, time & place Wednesday 16:30 - 18:00 122Room #122 (Graduate School of Math. Sci. Bldg.)

Future seminars

2026/04/14

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Akihiko Arai (Chiba University)
On the isomorphism problem for ultraproducts of $C^*$-algebras in continuous model theory
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm

2026/04/21

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Ayoub Hafid (Univ. Tokyo)
Concepts of coarse geometry on quantum metric spaces
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm

2026/04/28

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Roozbeh Hazrat (Western Sydney University)
An attempt to classify combinatorial algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm

2026/05/12

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Camila Sehnem (RIMS, Kyoto Univ.)
Injective envelopes for partial $C^*$-dynamical systems
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm

2026/05/19

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Hiroro Kamikawa (Kyoto Univ.)
TBA
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm

2026/05/26

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Takumi Nishihara (RIMS, Kyoto Univ.)
Compact group actions and $G$-kernels on von Neumann algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar-e.htm

2026/06/02

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Yusuke Nishinaka (Nagoya Univ.)
Costello-Gwilliam factorization algebras and vertex algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm

2026/06/09

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Taisuke Hoshino (Univ. Tokyo)
Rigidity for graph-wreath product II$_1$ factors
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm

2026/06/16

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Hiroki Ishikura (RIMS, Kyoto Univ.)
Borel planar complexes and soficity
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm

2026/07/07

16:45-18:15   Room #126 (Graduate School of Math. Sci. Bldg.)
Nanami Hashimoto (Keio University)
Equivalence of categories of KK-theory or E-theory for $C^*$-algebras over topological spaces by reflection functors
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm