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Operator Algebra Seminars
Seminar information archive ～03/27｜Next seminar｜Future seminars 03/28～
| Date, time & place | Wednesday 16:30 - 18:00 122Room #122 (Graduate School of Math. Sci. Bldg.) |
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Seminar information archive
2023/03/08
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Ricardo Correa da Silva (Friedrich-Alexander-Universität Erlangen-Nürnberg)
Structure and Inclusions of Twisted Araki-Woods Algebras (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Ricardo Correa da Silva (Friedrich-Alexander-Universität Erlangen-Nürnberg)
Structure and Inclusions of Twisted Araki-Woods Algebras (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/12/20
16:45-18:15 Online
Yosuke Kubota (Shinshu Univ.)
Band width and the Rosenberg index
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Yosuke Kubota (Shinshu Univ.)
Band width and the Rosenberg index
[ Abstract ]
Band width is a concept recently proposed by Gromov. It is based on the idea that when a certain band (i.e., manifold with two boundaries) is openly immersed to a target manifold M with positive scalar curvature metric, then its width is bounded by a uniform constant called the band width of M. A qualitative consequence is that infiniteness of the band width of M obstructs to positive scalar curvature.
In this talk, infiniteness of a version of the band width, Zeidler's KO-band width, is dominated as a PSC obstruction by an existing obstruction, the Rosenberg index. This answers to a conjecture by Zeidler.
[ Reference URL ]Band width is a concept recently proposed by Gromov. It is based on the idea that when a certain band (i.e., manifold with two boundaries) is openly immersed to a target manifold M with positive scalar curvature metric, then its width is bounded by a uniform constant called the band width of M. A qualitative consequence is that infiniteness of the band width of M obstructs to positive scalar curvature.
In this talk, infiniteness of a version of the band width, Zeidler's KO-band width, is dominated as a PSC obstruction by an existing obstruction, the Rosenberg index. This answers to a conjecture by Zeidler.
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/12/13
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Feng Xu (UC Riverside)
Entropy in QFT
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Feng Xu (UC Riverside)
Entropy in QFT
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/12/06
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Mao Hoshino (Univ. Tokyo)
Equivariant covering spaces of quantum homogeneous spaces
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Mao Hoshino (Univ. Tokyo)
Equivariant covering spaces of quantum homogeneous spaces
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/11/29
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Yuki Arano (Kyoto Univ.)
Actions of tensor categories on $C^*$-algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Yuki Arano (Kyoto Univ.)
Actions of tensor categories on $C^*$-algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/11/22
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Ryosuke Sato (Chuo Univ.)
Multiplicative characters and Gaussian fluctuation limits
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Ryosuke Sato (Chuo Univ.)
Multiplicative characters and Gaussian fluctuation limits
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/11/15
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Michiya Mori (Univ. Tokyo)
Ring isomorphisms of locally measurable operator algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Michiya Mori (Univ. Tokyo)
Ring isomorphisms of locally measurable operator algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/11/08
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Ryoya Arimoto (RIMS, Kyoto Univ.)
On the type of the von Neumann algebra of an open subgroup of the Neretin group
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Ryoya Arimoto (RIMS, Kyoto Univ.)
On the type of the von Neumann algebra of an open subgroup of the Neretin group
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/11/01
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Hiroki Ishikura (Univ. Tokyo)
Permutation stability of finitely generated free metabelian groups
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Hiroki Ishikura (Univ. Tokyo)
Permutation stability of finitely generated free metabelian groups
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/10/18
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Valerio Proietti (Univ. Tokyo)
A geometric Elliott invariant and noncommutative rigidity of mapping tori (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Valerio Proietti (Univ. Tokyo)
A geometric Elliott invariant and noncommutative rigidity of mapping tori (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/10/11
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Takuya Takeishi (Kyoto Inst. Tech.)
Constructing number field isomorphisms from *-isomorphisms of certain crossed product C*-algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Takuya Takeishi (Kyoto Inst. Tech.)
Constructing number field isomorphisms from *-isomorphisms of certain crossed product C*-algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/09/20
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Robert Coquereaux (CNRS/CPT)
Honeycombs, polytopes, and representation theory (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Robert Coquereaux (CNRS/CPT)
Honeycombs, polytopes, and representation theory (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/07/12
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Mao Hoshino (Univ. Tokyo)
Relative Drinfeld centers associated to monoidal functors
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Mao Hoshino (Univ. Tokyo)
Relative Drinfeld centers associated to monoidal functors
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/07/05
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Mizuki Oikawa (Univ. Tokyo)
Frobenius algebras associated with the $\alpha$-induction for twisted modules of conformal nets
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Mizuki Oikawa (Univ. Tokyo)
Frobenius algebras associated with the $\alpha$-induction for twisted modules of conformal nets
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/06/07
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Taro Sogabe (Univ. Tokyo)
Kirchberg algebras sharing the same homotopy groups of their automorphism groups
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Taro Sogabe (Univ. Tokyo)
Kirchberg algebras sharing the same homotopy groups of their automorphism groups
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/05/31
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Yusuke Isono (RIMS, Kyoto University)
Pointwise inner automorphisms of almost periodic factors
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Yusuke Isono (RIMS, Kyoto University)
Pointwise inner automorphisms of almost periodic factors
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/05/17
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Yoh Tanimoto (Univ. Rome, "Tor Vergata")
Towards integral perturbation of two-dimensional CFT (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Yoh Tanimoto (Univ. Rome, "Tor Vergata")
Towards integral perturbation of two-dimensional CFT (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/05/10
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Maria Stella Adamo (Univ. Tokyo)
Reflection positive representations - the case of the integers $\mathbb{Z}$ and the real line $\mathbb{R}$ (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Maria Stella Adamo (Univ. Tokyo)
Reflection positive representations - the case of the integers $\mathbb{Z}$ and the real line $\mathbb{R}$ (English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/04/19
16:45-18:15 Room #128 (Graduate School of Math. Sci. Bldg.)
Kei Ito (Univ. Tokyo)
Cartan subalgebras of $C^*$-algebras associated to dynamical systems
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Kei Ito (Univ. Tokyo)
Cartan subalgebras of $C^*$-algebras associated to dynamical systems
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/01/18
16:45-18:15 Online
Miho Mukohara (Univ. Tokyo)
C$^*$-simplicity of relative profinite completions of generalized Baumslag-Solitar groups
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Miho Mukohara (Univ. Tokyo)
C$^*$-simplicity of relative profinite completions of generalized Baumslag-Solitar groups
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2022/01/11
16:45-18:15 Online
Akihiro Miyagawa (Kyoto University)
Rationality for operators in free semicircular elements
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Akihiro Miyagawa (Kyoto University)
Rationality for operators in free semicircular elements
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2021/12/21
16:45-18:15 Online
Wojciech Dybalski (Adam Mickiewicz University in Poznan)
Interacting massless infraparticles in 1+1 dimensions
(English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Wojciech Dybalski (Adam Mickiewicz University in Poznan)
Interacting massless infraparticles in 1+1 dimensions
(English)
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2021/12/14
16:45-18:15 Online
Karen Strung (Czech Academy of Science)
Constructions in minimal amenable dynamics and applications to classification of $C^*$-algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Karen Strung (Czech Academy of Science)
Constructions in minimal amenable dynamics and applications to classification of $C^*$-algebras
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2021/12/07
16:45-18:15 Online
Junichiro Matsuda (Kyoto Univ.)
Classification of quantum graphs on $M_2$ and their quantum automorphism groups
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Junichiro Matsuda (Kyoto Univ.)
Classification of quantum graphs on $M_2$ and their quantum automorphism groups
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2021/11/30
16:45-18:15 Online
Yosuke Kubota (Shinshu Univ.)
Crystallographic $T$-duality in twisted equivariant $K$-theory
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Yosuke Kubota (Shinshu Univ.)
Crystallographic $T$-duality in twisted equivariant $K$-theory
[ Reference URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
