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過去の記録 ～04/17｜本日 04/18 | 今後の予定 04/19～
2026年04月20日(月)
複素解析幾何セミナー
10:30-12:00 数理科学研究科棟(駒場) 126号室
千葉 優作 氏 (お茶の水女子大学)
正値直線束の高次テンソルにおける $\overline{\partial}$ 方程式の $C^{\ell}$ 評価 (Japanese)
https://forms.gle/8ERsVDLuKHwbVzm57
千葉 優作 氏 (お茶の水女子大学)
正値直線束の高次テンソルにおける $\overline{\partial}$ 方程式の $C^{\ell}$ 評価 (Japanese)
[ 講演概要 ]
$M$ をコンパクト複素多様体，$L$ を $M$ 上の正値正則直線束，$E$ を $M$ 上の正則ベクトル束とする. このとき，$k$ が十分大きいときにはコホモロジー群 $H^i(M, L^k \otimes E)$ は $i>0$ に対して消滅することが知られている．この消滅定理は通常，Hörmander の $L^2$ 評価を用いて $\overline{\partial}$ 方程式を解くことで証明される．本講演では，Hörmander の方法を使わず，Andersson–Berndtsson（1982）の重み付き積分公式を用いることで，$\overline{\partial}$ 方程式の解に対する漸近的な $C^{\ell}$ ノルム評価を得る．
[ 参考URL ]$M$ をコンパクト複素多様体，$L$ を $M$ 上の正値正則直線束，$E$ を $M$ 上の正則ベクトル束とする. このとき，$k$ が十分大きいときにはコホモロジー群 $H^i(M, L^k \otimes E)$ は $i>0$ に対して消滅することが知られている．この消滅定理は通常，Hörmander の $L^2$ 評価を用いて $\overline{\partial}$ 方程式を解くことで証明される．本講演では，Hörmander の方法を使わず，Andersson–Berndtsson（1982）の重み付き積分公式を用いることで，$\overline{\partial}$ 方程式の解に対する漸近的な $C^{\ell}$ ノルム評価を得る．
https://forms.gle/8ERsVDLuKHwbVzm57
2026年04月21日(火)
トポロジー火曜セミナー
16:00-17:00 オンライン開催
セミナーのホームページから参加登録を行って下さい。
谷口 正樹 氏 (京都大学)
Exotic diffeomorphisms on a contractible 4-manifold surviving two stabilization (JAPANESE)
https://park.itc.u-tokyo.ac.jp/MSF/topology/TuesdaySeminar/index_e.html
セミナーのホームページから参加登録を行って下さい。
谷口 正樹 氏 (京都大学)
Exotic diffeomorphisms on a contractible 4-manifold surviving two stabilization (JAPANESE)
[ 講演概要 ]
Wall's stabilization principle suggests that exotic phenomena in dimension four in the orientable category disappear after taking connected sums with sufficiently many S2xS2. Since most known exotic pairs of closed 4-manifolds become diffeomorphic after one stabilization, a natural question was: is a single S2xS2 enough? Recently, Jianfeng Lin constructed an exotic diffeomorphism on a closed 4-manifold-a diffeomorphism topologically isotopic to the identity but not smoothly isotopic-that survives one stabilization. In this talk, we provide a relative exotic diffeomorphism on a compact contractible 4-manifold that survives two stabilizations. This gives the first exotic phenomenon in the orientable category that survives two stabilizations. This is joint work with Sungkyung Kang and Junghwan Park.
[ 参考URL ]Wall's stabilization principle suggests that exotic phenomena in dimension four in the orientable category disappear after taking connected sums with sufficiently many S2xS2. Since most known exotic pairs of closed 4-manifolds become diffeomorphic after one stabilization, a natural question was: is a single S2xS2 enough? Recently, Jianfeng Lin constructed an exotic diffeomorphism on a closed 4-manifold-a diffeomorphism topologically isotopic to the identity but not smoothly isotopic-that survives one stabilization. In this talk, we provide a relative exotic diffeomorphism on a compact contractible 4-manifold that survives two stabilizations. This gives the first exotic phenomenon in the orientable category that survives two stabilizations. This is joint work with Sungkyung Kang and Junghwan Park.
https://park.itc.u-tokyo.ac.jp/MSF/topology/TuesdaySeminar/index_e.html
作用素環セミナー
16:45-18:15 数理科学研究科棟(駒場) 126号室
Ayoub Hafid 氏 (東大数理)
量子距離空間上の疎幾何について
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Ayoub Hafid 氏 (東大数理)
量子距離空間上の疎幾何について
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2026年04月22日(水)
諸分野のための数学研究会
10:30-11:30 数理科学研究科棟(駒場) 056号室
通常の曜日と異なります。
吉岡 秀和 氏 (北陸先端科学技術大学院大学)
水圏環境を深く理解するための非標準的な数理モデル (日本語)
通常の曜日と異なります。
吉岡 秀和 氏 (北陸先端科学技術大学院大学)
水圏環境を深く理解するための非標準的な数理モデル (日本語)
[ 講演概要 ]
水に関わる環境や生物を対象とした研究では，教科書的な数理モデルでは記述できないかもしれない現象が数多く存在する．この講演では，まず，講演者が対象としてきた理論・フィールド研究事例を概観する．つぎに，以下の２研究の成果を紹介する：① (Musielak-)Orlicz空間を用いた長記憶的な河川流況の不確実性のモデル化，② 係数が爆発する確率微分方程式に基づく回遊魚の遡上現象の理論構築．この講演を通して，私たちに身近な環境には数理的によくわからない対象がたくさん存在することを知って頂ければ幸いである．
水に関わる環境や生物を対象とした研究では，教科書的な数理モデルでは記述できないかもしれない現象が数多く存在する．この講演では，まず，講演者が対象としてきた理論・フィールド研究事例を概観する．つぎに，以下の２研究の成果を紹介する：① (Musielak-)Orlicz空間を用いた長記憶的な河川流況の不確実性のモデル化，② 係数が爆発する確率微分方程式に基づく回遊魚の遡上現象の理論構築．この講演を通して，私たちに身近な環境には数理的によくわからない対象がたくさん存在することを知って頂ければ幸いである．
2026年04月24日(金)
談話会・数理科学講演会
15:30-16:30 数理科学研究科棟(駒場) NISSAY Lecture Hall(大講義室)号室
毛塚由佳子 氏 (東京大学大学院数理科学研究科)
Birch–Swinnerton-Dyer予想のdichotomy (日本語)
毛塚由佳子 氏 (東京大学大学院数理科学研究科)
Birch–Swinnerton-Dyer予想のdichotomy (日本語)
[ 講演概要 ]
本講演では, Birch–Swinnerton-Dyer予想を一つの「dichotomy」として捉える視点を紹介し, その枠組みのもとでBSD予想の内容をどのように捉え直せるかを考察する. この枠組みにおいては, 楕円曲線の解析的階数とMordell–Weil群の階数の一致や, Tate–Shafarevich群の有限性といった性質を個別に仮定しない. むしろ, これらの性質が互いに強く結びついており, 一方が成り立たないときには他方もまた特定の形で成り立たなくなる, という相関に着目する. 講演では, この考えに至る動機として, (1) 岩澤理論との類似, (2) 楕円曲線に関する既知の結果との関連, (3) 函数体の場合との対比, という三つの観点から説明する.
本講演の内容はDon Zagier氏(MPIM Bonn)との共同研究に基づく.
本講演では, Birch–Swinnerton-Dyer予想を一つの「dichotomy」として捉える視点を紹介し, その枠組みのもとでBSD予想の内容をどのように捉え直せるかを考察する. この枠組みにおいては, 楕円曲線の解析的階数とMordell–Weil群の階数の一致や, Tate–Shafarevich群の有限性といった性質を個別に仮定しない. むしろ, これらの性質が互いに強く結びついており, 一方が成り立たないときには他方もまた特定の形で成り立たなくなる, という相関に着目する. 講演では, この考えに至る動機として, (1) 岩澤理論との類似, (2) 楕円曲線に関する既知の結果との関連, (3) 函数体の場合との対比, という三つの観点から説明する.
本講演の内容はDon Zagier氏(MPIM Bonn)との共同研究に基づく.
2026年04月27日(月)
複素解析幾何セミナー
10:30-12:00 数理科学研究科棟(駒場) 126号室
大野 高志 氏 (京大数理研)
Manton’s Exotic Vortex Equations (Japanese)
https://forms.gle/8ERsVDLuKHwbVzm57
大野 高志 氏 (京大数理研)
Manton’s Exotic Vortex Equations (Japanese)
[ 講演概要 ]
The vortex equation is a second-order PDE on a Riemann surface, defined in terms of a triple consisting of a holomorphic line bundle, a section, and a Hermitian metric. Its solutions are closely related to Hermitian–Einstein metrics and to geometric structures such as metrics with conical singularities. In https://arxiv.org/abs/1612.06710, Manton introduced several generalizations of the vortex equation, leading to five distinct types of vortex equations, which we refer to as Manton’s exotic vortex equations. In this talk, I will introduce these equations and discuss the existence of their solutions. I will also explain how these solutions can be obtained via dimensional reduction of a solution of Hermitian–Einstein equation.
[ 参考URL ]The vortex equation is a second-order PDE on a Riemann surface, defined in terms of a triple consisting of a holomorphic line bundle, a section, and a Hermitian metric. Its solutions are closely related to Hermitian–Einstein metrics and to geometric structures such as metrics with conical singularities. In https://arxiv.org/abs/1612.06710, Manton introduced several generalizations of the vortex equation, leading to five distinct types of vortex equations, which we refer to as Manton’s exotic vortex equations. In this talk, I will introduce these equations and discuss the existence of their solutions. I will also explain how these solutions can be obtained via dimensional reduction of a solution of Hermitian–Einstein equation.
https://forms.gle/8ERsVDLuKHwbVzm57
2026年04月28日(火)
トポロジー火曜セミナー
16:00-17:30 数理科学研究科棟(駒場) hybrid/056号室
対面参加、オンライン参加のいずれの場合もセミナーのホームページから参加登録を行って下さい。
佐野 岳人 氏 (理化学研究所)
A y-ification of Khovanov homology (JAPANESE)
https://park.itc.u-tokyo.ac.jp/MSF/topology/TuesdaySeminar/index_e.html
対面参加、オンライン参加のいずれの場合もセミナーのホームページから参加登録を行って下さい。
佐野 岳人 氏 (理化学研究所)
A y-ification of Khovanov homology (JAPANESE)
[ 講演概要 ]
In this talk, I will explain the main results of my recent paper (arXiv:2602.17435).
Khovanov homology is a categorification of the Jones polynomial, introduced by M. Khovanov. A persistent theme in the subject is that adding extra structures on Khovanov homology strengthens the invariant, and often detects phenomena invisible at the level of polynomials or bigraded vector spaces.
Motivated by the y-ification of HOMFLY--PT homology by Gorsky and Hogancamp, and the sl2-action constructed by Gorsky, Hogancamp and Mellit, we construct a y-ification of Khovanov homology and define an action of the element e in sl2 on these y-ifications. Our construction is compatible with the previous ones via Rasmussen's spectral sequence from HOMFLY--PT homology to Khovanov homology; yet our approach is more elementary and suited to diagrammatic and algorithmic computations. As an application, we show that the additional structure can distinguish knots with identical Khovanov homology and identical HOMFLY--PT homology, in particular the Conway knot and the Kinoshita--Terasaka knot.
[ 参考URL ]In this talk, I will explain the main results of my recent paper (arXiv:2602.17435).
Khovanov homology is a categorification of the Jones polynomial, introduced by M. Khovanov. A persistent theme in the subject is that adding extra structures on Khovanov homology strengthens the invariant, and often detects phenomena invisible at the level of polynomials or bigraded vector spaces.
Motivated by the y-ification of HOMFLY--PT homology by Gorsky and Hogancamp, and the sl2-action constructed by Gorsky, Hogancamp and Mellit, we construct a y-ification of Khovanov homology and define an action of the element e in sl2 on these y-ifications. Our construction is compatible with the previous ones via Rasmussen's spectral sequence from HOMFLY--PT homology to Khovanov homology; yet our approach is more elementary and suited to diagrammatic and algorithmic computations. As an application, we show that the additional structure can distinguish knots with identical Khovanov homology and identical HOMFLY--PT homology, in particular the Conway knot and the Kinoshita--Terasaka knot.
https://park.itc.u-tokyo.ac.jp/MSF/topology/TuesdaySeminar/index_e.html
作用素環セミナー
16:45-18:15 数理科学研究科棟(駒場) 126号室
Roozbeh Hazrat 氏 (Western Sydney University)
An attempt to classify combinatorial algebras
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Roozbeh Hazrat 氏 (Western Sydney University)
An attempt to classify combinatorial algebras
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Lie群論・表現論セミナー
16:00-17:00 数理科学研究科棟(駒場) 128号室
Khalid Koufany 氏 (University of Lorraine)
Geometric Means that preserve sparsity on homogeneous cones
(English)
Khalid Koufany 氏 (University of Lorraine)
Geometric Means that preserve sparsity on homogeneous cones
(English)
[ 講演概要 ]
This talk starts from a simple question: how can one define a geometric mean for sparse positive definite matrices without destroying their zero pattern?
For the arrowhead pattern, this leads naturally to the five-dimensional Vinberg cone, a basic non-symmetric homogeneous cone.
I will present two intrinsic means on this cone: a Cholesky-Vinberg mean built from triangular Cholesky factors, and a logarithmic Vinberg mean built from global clan (Vinberg algebra) coordinates.
The first is tied to a flat affine geometry with torsion, while the second belongs to a torsion-free flat geometry.
I will also explain why these means differ from the classical Riemannian midpoint and why this difference is a genuinely non-symmetric phenomenon.
If time permits, I will give an application to quantum information theory.
This talk starts from a simple question: how can one define a geometric mean for sparse positive definite matrices without destroying their zero pattern?
For the arrowhead pattern, this leads naturally to the five-dimensional Vinberg cone, a basic non-symmetric homogeneous cone.
I will present two intrinsic means on this cone: a Cholesky-Vinberg mean built from triangular Cholesky factors, and a logarithmic Vinberg mean built from global clan (Vinberg algebra) coordinates.
The first is tied to a flat affine geometry with torsion, while the second belongs to a torsion-free flat geometry.
I will also explain why these means differ from the classical Riemannian midpoint and why this difference is a genuinely non-symmetric phenomenon.
If time permits, I will give an application to quantum information theory.
2026年05月11日(月)
複素解析幾何セミナー
10:30-12:00 数理科学研究科棟(駒場) 126号室
Luc Pirio 氏 (CNRS)
(English)
[ 参考URL ]
https://forms.gle/8ERsVDLuKHwbVzm57
Luc Pirio 氏 (CNRS)
(English)
[ 参考URL ]
https://forms.gle/8ERsVDLuKHwbVzm57
2026年05月12日(火)
トポロジー火曜セミナー
16:00-17:00 オンライン開催
セミナーのホームページから参加登録を行って下さい。
Sanghoon Kwak 氏 (Seoul National University)
Mapping class group of Infinite graph: 'Big' Out(Fn) (ENGLISH)
https://park.itc.u-tokyo.ac.jp/MSF/topology/TuesdaySeminar/index_e.html
セミナーのホームページから参加登録を行って下さい。
Sanghoon Kwak 氏 (Seoul National University)
Mapping class group of Infinite graph: 'Big' Out(Fn) (ENGLISH)
[ 講演概要 ]
Algom-Kfir and Bestvina introduced the mapping class groups of locally finite, infinite graphs in 2021. Since Out(Fn) can be realized as the mapping group of a finite graph, their construction may be viewed as a "big" version of Out(Fn). In this talk, we survey the algebraic and coarse geometric properties of these groups and discuss a relationship with mapping class groups of infinite-type surfaces ("big mapping class groups"). This talk is based on joint work with Ryan Dickmann, George Domat, and Hannah Hoganson, in various collaborations.
[ 参考URL ]Algom-Kfir and Bestvina introduced the mapping class groups of locally finite, infinite graphs in 2021. Since Out(Fn) can be realized as the mapping group of a finite graph, their construction may be viewed as a "big" version of Out(Fn). In this talk, we survey the algebraic and coarse geometric properties of these groups and discuss a relationship with mapping class groups of infinite-type surfaces ("big mapping class groups"). This talk is based on joint work with Ryan Dickmann, George Domat, and Hannah Hoganson, in various collaborations.
https://park.itc.u-tokyo.ac.jp/MSF/topology/TuesdaySeminar/index_e.html
作用素環セミナー
16:45-18:15 数理科学研究科棟(駒場) 126号室
Camila Sehnem 氏 (京大数理研)
Injective envelopes for partial $C^*$-dynamical systems
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
Camila Sehnem 氏 (京大数理研)
Injective envelopes for partial $C^*$-dynamical systems
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
代数幾何学セミナー
13:30-15:00 数理科学研究科棟(駒場) 128号室
斎藤 秀司 氏 (東京大学)
TBA
斎藤 秀司 氏 (東京大学)
TBA
[ 講演概要 ]
TBA
TBA
2026年05月14日(木)
幾何解析セミナー
14:30-16:45 数理科学研究科棟(駒場) 117号室
Jacob Bernstein 氏 (Johns Hopkins University) 14:30-15:30
Complexity of submanifolds and Colding-Minicozzi entropy (英語)
https://sites.google.com/g.ecc.u-tokyo.ac.jp/geometricanalysisseminar/
Peter Topping 氏 (University of Warwick) 15:45-16:45
TBA (英語)
https://sites.google.com/g.ecc.u-tokyo.ac.jp/geometricanalysisseminar/
Jacob Bernstein 氏 (Johns Hopkins University) 14:30-15:30
Complexity of submanifolds and Colding-Minicozzi entropy (英語)
[ 講演概要 ]
Colding-Minicozzi entropy is a natural quantity associated to mean curvature flow which measures complexity of submanifolds of Euclidean space. We discuss some (nearly) optimal relationships between entropy and areas of (minimal) submanifolds of the sphere.
[ 参考URL ]Colding-Minicozzi entropy is a natural quantity associated to mean curvature flow which measures complexity of submanifolds of Euclidean space. We discuss some (nearly) optimal relationships between entropy and areas of (minimal) submanifolds of the sphere.
https://sites.google.com/g.ecc.u-tokyo.ac.jp/geometricanalysisseminar/
Peter Topping 氏 (University of Warwick) 15:45-16:45
TBA (英語)
[ 講演概要 ]
TBA
[ 参考URL ]TBA
https://sites.google.com/g.ecc.u-tokyo.ac.jp/geometricanalysisseminar/
2026年05月19日(火)
作用素環セミナー
16:45-18:15 数理科学研究科棟(駒場) 126号室
上川弘郎 氏 (京都大学)
未定
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
上川弘郎 氏 (京都大学)
未定
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2026年05月22日(金)
代数幾何学セミナー
13:15-14:45 数理科学研究科棟(駒場) 117号室
Justin Sawon 氏 (University of North Carolina Chapel Hill)
Classification results for Lagrangian fibrations
Justin Sawon 氏 (University of North Carolina Chapel Hill)
Classification results for Lagrangian fibrations
[ 講演概要 ]
A Lagrangian fibration on a holomorphic symplectic manifold or variety is one whose general fibre is an abelian variety that is Lagrangian with respect to the symplectic form. Examples were constructed by Beauville/Mukai whose fibres are Jacobians of curves, and by Markushevich-Tikhomirov, Arbarella-Sacca-Ferretti, Matteini, S-Shen, and Brakkee-Camere-Grossi-Pertusi-Sacca-Viktorova whose fibres are Prym varieties of curves with involutions. In all of these examples the family of curves is a linear system on a K3 surface, suggesting the question: is this always the case? Markushevich answered this affirmatively in the genus two case: if the relative compactified Jacobian of a family of genus two curves is a Lagrangian fibration then the curves all lie on a K3 surface, and the Lagrangian fibration is a Beauville-Mukai system. In this talk I will describe our generalization of this result to higher genus, and also to relative Prym varieties of genus three covers with involutions (joint work with Xuqiang Qin).
A Lagrangian fibration on a holomorphic symplectic manifold or variety is one whose general fibre is an abelian variety that is Lagrangian with respect to the symplectic form. Examples were constructed by Beauville/Mukai whose fibres are Jacobians of curves, and by Markushevich-Tikhomirov, Arbarella-Sacca-Ferretti, Matteini, S-Shen, and Brakkee-Camere-Grossi-Pertusi-Sacca-Viktorova whose fibres are Prym varieties of curves with involutions. In all of these examples the family of curves is a linear system on a K3 surface, suggesting the question: is this always the case? Markushevich answered this affirmatively in the genus two case: if the relative compactified Jacobian of a family of genus two curves is a Lagrangian fibration then the curves all lie on a K3 surface, and the Lagrangian fibration is a Beauville-Mukai system. In this talk I will describe our generalization of this result to higher genus, and also to relative Prym varieties of genus three covers with involutions (joint work with Xuqiang Qin).
2026年05月25日(月)
複素解析幾何セミナー
10:30-12:00 数理科学研究科棟(駒場) 126号室
大橋 美佐 氏 (名古屋工業大学)
(Japanese)
[ 参考URL ]
https://forms.gle/8ERsVDLuKHwbVzm57
大橋 美佐 氏 (名古屋工業大学)
(Japanese)
[ 参考URL ]
https://forms.gle/8ERsVDLuKHwbVzm57
2026年05月26日(火)
作用素環セミナー
16:45-18:15 数理科学研究科棟(駒場) 126号室
西原拓生 氏 (京大数理研)
Compact group actions and $G$-kernels on von Neumann algebras
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar-e.htm
西原拓生 氏 (京大数理研)
Compact group actions and $G$-kernels on von Neumann algebras
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar-e.htm
数値解析セミナー
16:30-18:00 数理科学研究科棟(駒場) 002号室
Qin Sheng 氏 (Baylor University)
Advances in Splitting: Intercardinal Approaches to Nonlinear Hideo Kawarada Equations
(English)
https://sites.google.com/g.ecc.u-tokyo.ac.jp/utnas-bulletin-board/
Qin Sheng 氏 (Baylor University)
Advances in Splitting: Intercardinal Approaches to Nonlinear Hideo Kawarada Equations
(English)
[ 講演概要 ]
This presentation addresses two main issues. First, we shall discuss recent advancements in both exponential and non-exponential splitting methods, with particular emphasis on their stability, accuracy and global error estimates. Second, we shall introduce a new splitting configuration for solving nonlinear Hideo Kawarada equations with mixed derivative terms. This approach leads to intercardinal splitting finite-difference schemes that provide efficient and accurate numerical approximations of the underlying solutions.
We shall further demonstrate that the resulting implicit methods are numerically stable, convergent, and efficient, while preserving key physical properties such as the positivity and monotonicity. The dynamic orders of accuracy of the proposed algorithms will be illustrated using generalized Milne devices. Simulation examples of the solution procedure will be presented and investigated, and several open problems will also be outlined.
[ 参考URL ]This presentation addresses two main issues. First, we shall discuss recent advancements in both exponential and non-exponential splitting methods, with particular emphasis on their stability, accuracy and global error estimates. Second, we shall introduce a new splitting configuration for solving nonlinear Hideo Kawarada equations with mixed derivative terms. This approach leads to intercardinal splitting finite-difference schemes that provide efficient and accurate numerical approximations of the underlying solutions.
We shall further demonstrate that the resulting implicit methods are numerically stable, convergent, and efficient, while preserving key physical properties such as the positivity and monotonicity. The dynamic orders of accuracy of the proposed algorithms will be illustrated using generalized Milne devices. Simulation examples of the solution procedure will be presented and investigated, and several open problems will also be outlined.
https://sites.google.com/g.ecc.u-tokyo.ac.jp/utnas-bulletin-board/
2026年06月01日(月)
複素解析幾何セミナー
10:30-12:00 数理科学研究科棟(駒場) 126号室
小森 洋平 氏 (早稲田大学)
(Japanese)
[ 参考URL ]
https://forms.gle/8ERsVDLuKHwbVzm57
小森 洋平 氏 (早稲田大学)
(Japanese)
[ 参考URL ]
https://forms.gle/8ERsVDLuKHwbVzm57
2026年06月02日(火)
作用素環セミナー
16:45-18:15 数理科学研究科棟(駒場) 126号室
西中祐介 氏 (大阪公立大)
Costello-Gwilliam factorization algebras and vertex algebras
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
西中祐介 氏 (大阪公立大)
Costello-Gwilliam factorization algebras and vertex algebras
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2026年06月05日(金)
代数幾何学セミナー
13:15-14:45 数理科学研究科棟(駒場) 117号室
Young-Hoon Kiem 氏 (Korea Institute for Advanced Study)
TBA
Young-Hoon Kiem 氏 (Korea Institute for Advanced Study)
TBA
[ 講演概要 ]
TBA
TBA
2026年06月09日(火)
作用素環セミナー
16:45-18:15 数理科学研究科棟(駒場) 126号室
星野泰佑 氏 (東大数理)
Rigidity for graph-wreath product II$_1$ factors
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
星野泰佑 氏 (東大数理)
Rigidity for graph-wreath product II$_1$ factors
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2026年06月16日(火)
作用素環セミナー
16:45-18:15 数理科学研究科棟(駒場) 126号室
石倉宙樹 氏 (京大数理研)
Borel planar complexes and soficity
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
石倉宙樹 氏 (京大数理研)
Borel planar complexes and soficity
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
2026年07月07日(火)
作用素環セミナー
16:45-18:15 数理科学研究科棟(駒場) 126号室
橋本七海 氏 (慶応大)
Equivalence of categories of KK-theory or E-theory for $C^*$-algebras over topological spaces by reflection functors
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
橋本七海 氏 (慶応大)
Equivalence of categories of KK-theory or E-theory for $C^*$-algebras over topological spaces by reflection functors
[ 参考URL ]
https://www.ms.u-tokyo.ac.jp/~yasuyuki/tokyo-seminar.htm
