## Operator Algebra Seminars

Seminar information archive ～08/09｜Next seminar｜Future seminars 08/10～

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

### 2018/02/14

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Index theory on the Mishchenko bundle (English)

**Valerio Proietti**(Copenhagen Univ.)Index theory on the Mishchenko bundle (English)

### 2018/01/29

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Tingley's problem for operator algebras

**Michiya Mori**(Univ. Tokyo)Tingley's problem for operator algebras

### 2018/01/22

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

On Cauchy noise loss in a stochastic parameter optimization of random matrices

**Tomohiro Hayase**(Univ. Tokyo)On Cauchy noise loss in a stochastic parameter optimization of random matrices

### 2017/12/25

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Kazhdan's property (T) and semidefinite programming

**Narutaka Ozawa**(RIMS, Kyoto University)Kazhdan's property (T) and semidefinite programming

### 2017/12/18

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Isomorphism and Morita equivalence classes for crossed product of irrational rotation algebras by cyclic subgroups of $SL_2({\mathbb Z})$ (English)

**Zhuofeng He**(Univ. Tokyo)Isomorphism and Morita equivalence classes for crossed product of irrational rotation algebras by cyclic subgroups of $SL_2({\mathbb Z})$ (English)

### 2017/12/04

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Subfactors and wiretapping channels

(English)

**Pieter Naaijkens**(UC Davis)Subfactors and wiretapping channels

(English)

### 2017/11/13

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Globularily generated double categories: On the problem of existence of internalizations for decorated bicategories (English)

**Juan Orendain**(UNAM)Globularily generated double categories: On the problem of existence of internalizations for decorated bicategories (English)

### 2017/10/30

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

The bicategory of $W^*$-bimodules

**Yusuke Sawada**(Nagoya Univ.)The bicategory of $W^*$-bimodules

### 2017/10/02

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Introduction to intermediate rank geometry (English)

**Mikael Pichot**(RIMS, Kyoto Univ./McGill Univ.)Introduction to intermediate rank geometry (English)

### 2017/07/28

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Free orthogonal groups and quantum information

(English)

**Benoit Collins**(Kyoto Univ.)Free orthogonal groups and quantum information

(English)

### 2017/07/10

16:45-18:15 Room #118 (Graduate School of Math. Sci. Bldg.)

Rokhlin actions of fusion categories

**Yuki Arano**(Kyoto Univ.)Rokhlin actions of fusion categories

### 2017/07/03

16:45-18:15 Room #118 (Graduate School of Math. Sci. Bldg.)

A State-Dependent Noncontextuality Inequality in Algebraic Quantum Theory

**Yuichiro Kitajima**(Nihon University)A State-Dependent Noncontextuality Inequality in Algebraic Quantum Theory

### 2017/06/26

16:45-18:15 Room #118 (Graduate School of Math. Sci. Bldg.)

Dimension, comparison, and almost finiteness (English)

**David Kerr**(Texas A & M Univ.)Dimension, comparison, and almost finiteness (English)

### 2017/05/29

16:45-18:15 Room #118 (Graduate School of Math. Sci. Bldg.)

On fundamental groups of tensor product II$_1$ factors (English)

**Yusuke Isono**(RIMS, Kyoto Univ.)On fundamental groups of tensor product II$_1$ factors (English)

### 2017/05/22

16:45-18:15 Room #118 (Graduate School of Math. Sci. Bldg.)

(English)

**Toshihiko Masuda**(Kyushu Univ.)(English)

### 2017/04/24

16:45-18:15 Room #118 (Graduate School of Math. Sci. Bldg.)

Bass-Serre trees of amalgamated free product $C^*$-algebras (English)

**Kei Hasegawa**(Kyushu Univ.)Bass-Serre trees of amalgamated free product $C^*$-algebras (English)

### 2017/04/17

16:45-18:15 Room #118 (Graduate School of Math. Sci. Bldg.)

On diagonal actions whose full group is closed (English)

**Yoshikata Kida**(Univ. Tokyo)On diagonal actions whose full group is closed (English)

### 2017/04/10

16:45-18:15 Room #118 (Graduate School of Math. Sci. Bldg.)

Reconstruction of the Bost-Connes groupoid from K-theoretic data (English)

**Yosuke Kubota**(Riken)Reconstruction of the Bost-Connes groupoid from K-theoretic data (English)

### 2016/12/12

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

The Roe cocycle and an index theorem on partitioned manifolds, and toward generalizations

(Japanese)

**Tatsuki Seto**(Nagoya Univ.)The Roe cocycle and an index theorem on partitioned manifolds, and toward generalizations

(Japanese)

### 2016/12/05

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

On a generalized Fraïssé limit construction (English)

**Shuhei Masumoto**(Univ.Tokyo)On a generalized Fraïssé limit construction (English)

### 2016/11/28

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Fock space deformed by Coxeter groups (English)

**Takahiro Hasebe**(Hokkaido University)Fock space deformed by Coxeter groups (English)

### 2016/11/21

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Finite-dimensional representations constructed from random walks (joint work with A. Erschler)

**Narutaka Ozawa**(RIMS, Kyoto Univ.)Finite-dimensional representations constructed from random walks (joint work with A. Erschler)

### 2016/10/31

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Dual cocycles and equivariant deformation quantization (English)

**Sergey Neshveyev**(Univ. Oslo)Dual cocycles and equivariant deformation quantization (English)

### 2016/10/24

16:45-18:15 Room #117 (Graduate School of Math. Sci. Bldg.)

Cartan subalgebras of tensor products of free quantum group factors with arbitrary factors

**Yusuke Isono**(RIMS, Kyoto Univ.)Cartan subalgebras of tensor products of free quantum group factors with arbitrary factors

### 2016/10/17

16:45-18:15 Room #126 (Graduate School of Math. Sci. Bldg.)

Unitarizability, Maurey-Nikishin factorization and Polish groups of finite type (English)

**Hiroshi Ando**(Chiba Univ.)Unitarizability, Maurey-Nikishin factorization and Polish groups of finite type (English)