過去の記録
過去の記録 ~10/09|本日 10/10 | 今後の予定 10/11~
2013年02月19日(火)
トポロジー火曜セミナー
16:30-18:00 数理科学研究科棟(駒場) 056号室
Tea: 16:00 - 16:30 コモンルーム
畠中 英里 氏 (東京農工大学)
On the ring of Fricke characters of free groups (JAPANESE)
Tea: 16:00 - 16:30 コモンルーム
畠中 英里 氏 (東京農工大学)
On the ring of Fricke characters of free groups (JAPANESE)
[ 講演概要 ]
This is a joint work with Takao Satoh (Tokyo University of Science). We study a descending filtration of the ring of Fricke characters of a free group consisting of ideals on which the automorphism group of the free group naturally acts. Then by using it, we define a descending filtration of the automorphism group of a free group, and investigate a relation between it and the Andreadakis-Johnson filtration.
This is a joint work with Takao Satoh (Tokyo University of Science). We study a descending filtration of the ring of Fricke characters of a free group consisting of ideals on which the automorphism group of the free group naturally acts. Then by using it, we define a descending filtration of the automorphism group of a free group, and investigate a relation between it and the Andreadakis-Johnson filtration.
2013年02月18日(月)
GCOEセミナー
17:00-18:00 数理科学研究科棟(駒場) 270号室
Larisa A. Nazarova 氏 (Department
Institute of Mining Siberian Branch of Russian Academy of Sciences)
INVERSE PROBLEMS OF GEOMECHANICS AND ITS APPLICATION IN MINING AND GEOPHYSICS (ENGLISH)
Larisa A. Nazarova 氏 (Department
Institute of Mining Siberian Branch of Russian Academy of Sciences)
INVERSE PROBLEMS OF GEOMECHANICS AND ITS APPLICATION IN MINING AND GEOPHYSICS (ENGLISH)
[ 講演概要 ]
The communication devotes to the boundary, coefficient and mixed inverse problems in modeling solid mineral mining processes.
Direct and indirect methods for estimation of natural stress field components were compared.
Based on GPS data (South Siberia, 2000-2003) interpretation the possible indicator (sharp increase of horizontal strains increment in epicenter vicinity) of future strong seismic event was established.
The theoretical approach for evaluation of future earthquake focal parameters (hypocentre depth and fractal dimension of fault anomalous zone) was proposed. The approach is found on inverse problem solution by variation of daylight surface strains.
Using a viscoelastic model, a method is proposed to evaluating the equation-of-state parameters that describe deformation of structural units of the room-and-pillar implementation in bedded deposits composed of rocks developing rheological properties. The method is based on the inverse coefficient problem solution with the data on roof and floor convergence in stopes.
A method of day-to-day qualitative assessment of elastic and strength properties of backfill in flat bedded deposits has been developed on the basis of the solution of the coefficient inverse problem for a set of equations (quasi-static formulation) which describe deformation and failure of filling mass. Uniqueness of the solution only requires simultaneous minimization of two objective functions.
The communication devotes to the boundary, coefficient and mixed inverse problems in modeling solid mineral mining processes.
Direct and indirect methods for estimation of natural stress field components were compared.
Based on GPS data (South Siberia, 2000-2003) interpretation the possible indicator (sharp increase of horizontal strains increment in epicenter vicinity) of future strong seismic event was established.
The theoretical approach for evaluation of future earthquake focal parameters (hypocentre depth and fractal dimension of fault anomalous zone) was proposed. The approach is found on inverse problem solution by variation of daylight surface strains.
Using a viscoelastic model, a method is proposed to evaluating the equation-of-state parameters that describe deformation of structural units of the room-and-pillar implementation in bedded deposits composed of rocks developing rheological properties. The method is based on the inverse coefficient problem solution with the data on roof and floor convergence in stopes.
A method of day-to-day qualitative assessment of elastic and strength properties of backfill in flat bedded deposits has been developed on the basis of the solution of the coefficient inverse problem for a set of equations (quasi-static formulation) which describe deformation and failure of filling mass. Uniqueness of the solution only requires simultaneous minimization of two objective functions.
2013年02月16日(土)
東京無限可積分系セミナー
13:30-15:00 数理科学研究科棟(駒場) 117号室
Alexey Silantyev 氏 (Tokyo. Univ.)
Generalized Calogero-Moser type systems and Cherednik Algebras (ENGLISH)
Alexey Silantyev 氏 (Tokyo. Univ.)
Generalized Calogero-Moser type systems and Cherednik Algebras (ENGLISH)
[ 講演概要 ]
Calogero-Moser systems can be obtained using Dunkl operators, which
define the polynomial representation of the corresponding rational
Cherednik algebra. Parabolic ideals invariant under the action of the
Dunkl operators give submodules of Cherednik algebra. Considering the
corresponding quotient-modules one yields the generalized (or deformed)
Calogero-Moser systems. In the same way we construct the generalized
elliptic Calogero-Moser systems using the elliptic Dunkl operators
obtained by Buchstaber, Felder and Veselov. The Macdonald-Ruijsenaars
systems (difference (relativistic) Calogero-Moser type systems) can be
considered in terms of Double Affine Hecke Algebra (DAHA). We construct
appropriate submodules in the polynomial representation of DAHA, which
were obtained by Kasatani for some affine root systems. Considering the
corresponding quotient representation we derive the generalized
(deformed) Macdonald-Ruijsenaars systems for any affine root system,
which where obtained by Sergeev and Veselov for the A series. This is
joint work with Misha Feigin.
Calogero-Moser systems can be obtained using Dunkl operators, which
define the polynomial representation of the corresponding rational
Cherednik algebra. Parabolic ideals invariant under the action of the
Dunkl operators give submodules of Cherednik algebra. Considering the
corresponding quotient-modules one yields the generalized (or deformed)
Calogero-Moser systems. In the same way we construct the generalized
elliptic Calogero-Moser systems using the elliptic Dunkl operators
obtained by Buchstaber, Felder and Veselov. The Macdonald-Ruijsenaars
systems (difference (relativistic) Calogero-Moser type systems) can be
considered in terms of Double Affine Hecke Algebra (DAHA). We construct
appropriate submodules in the polynomial representation of DAHA, which
were obtained by Kasatani for some affine root systems. Considering the
corresponding quotient representation we derive the generalized
(deformed) Macdonald-Ruijsenaars systems for any affine root system,
which where obtained by Sergeev and Veselov for the A series. This is
joint work with Misha Feigin.
2013年02月08日(金)
講演会
10:30-11:30 数理科学研究科棟(駒場) 370号室
Zdzislaw Brzezniak 氏 (University of York)
Strong and weak solutions to stochastic Landau-Lifshitz equations (ENGLISH)
Zdzislaw Brzezniak 氏 (University of York)
Strong and weak solutions to stochastic Landau-Lifshitz equations (ENGLISH)
[ 講演概要 ]
I will speak about the existence of weak solutions (and the existence and uniqueness of strong solutions) to the stochastic Landau-Lifshitz equations for multi (and one)-dimensional spatial domains. I will also describe the corresponding Large Deviations principle and it's applications to a ferromagnetic wire.
The talk is based on a joint work with B. Goldys and T. Jegaraj.
I will speak about the existence of weak solutions (and the existence and uniqueness of strong solutions) to the stochastic Landau-Lifshitz equations for multi (and one)-dimensional spatial domains. I will also describe the corresponding Large Deviations principle and it's applications to a ferromagnetic wire.
The talk is based on a joint work with B. Goldys and T. Jegaraj.
博士論文発表会
09:45-11:00 数理科学研究科棟(駒場) 118号室
古場 一 氏 (東京大学大学院数理科学研究科)
Stability of Navier-Stokes-Boussinesq Type Systems(ナヴィエ・ストークス・ブジネスク型方程式の安定性) (JAPANESE)
古場 一 氏 (東京大学大学院数理科学研究科)
Stability of Navier-Stokes-Boussinesq Type Systems(ナヴィエ・ストークス・ブジネスク型方程式の安定性) (JAPANESE)
博士論文発表会
11:00-12:15 数理科学研究科棟(駒場) 118号室
大島 芳樹 氏 (東京大学大学院数理科学研究科)
Discrete branching laws of Zuckerman\\'s derived functor modulesZuckerman(導来関手加群の離散的分岐則) (JAPANESE)
大島 芳樹 氏 (東京大学大学院数理科学研究科)
Discrete branching laws of Zuckerman\\'s derived functor modulesZuckerman(導来関手加群の離散的分岐則) (JAPANESE)
博士論文発表会
11:00-12:15 数理科学研究科棟(駒場) 118号室
大島 芳樹 氏 (東京大学大学院数理科学研究科)
Discrete branching laws of Zuckerman\\'s derived functor modulesZuckerman(導来関手加群の離散的分岐則) (JAPANESE)
大島 芳樹 氏 (東京大学大学院数理科学研究科)
Discrete branching laws of Zuckerman\\'s derived functor modulesZuckerman(導来関手加群の離散的分岐則) (JAPANESE)
博士論文発表会
11:00-12:15 数理科学研究科棟(駒場) 118号室
大島 芳樹 氏 (東京大学大学院数理科学研究科)
Discrete branching laws of Zuckerman’s derived functor modules(Zuckerman導来関手加群の離散的分岐則) (JAPANESE)
大島 芳樹 氏 (東京大学大学院数理科学研究科)
Discrete branching laws of Zuckerman’s derived functor modules(Zuckerman導来関手加群の離散的分岐則) (JAPANESE)
博士論文発表会
13:00-14:15 数理科学研究科棟(駒場) 118号室
Uzun Mecit Kerem 氏 (東京大学大学院数理科学研究科)
Motivic Homology and Class Field Theory over p-adic Fields(p-進数体の上モチフィックホモロジーと類体論) (JAPANESE)
Uzun Mecit Kerem 氏 (東京大学大学院数理科学研究科)
Motivic Homology and Class Field Theory over p-adic Fields(p-進数体の上モチフィックホモロジーと類体論) (JAPANESE)
博士論文発表会
14:15-15:30 数理科学研究科棟(駒場) 118号室
植松 哲也 氏 (東京大学大学院数理科学研究科)
Uniform Representability of the Brauer Group of Diagonal Cubic Surfaces(対角的3次曲面のBrauer群の統一的な表示可能性について) (JAPANESE)
植松 哲也 氏 (東京大学大学院数理科学研究科)
Uniform Representability of the Brauer Group of Diagonal Cubic Surfaces(対角的3次曲面のBrauer群の統一的な表示可能性について) (JAPANESE)
博士論文発表会
09:30-10:45 数理科学研究科棟(駒場) 128号室
Li Qinglong 氏 (東京大学大学院数理科学研究科)
Nuclearity of reduced free product C*-algebras(既約自由積C*環の核型性について) (JAPANESE)
Li Qinglong 氏 (東京大学大学院数理科学研究科)
Nuclearity of reduced free product C*-algebras(既約自由積C*環の核型性について) (JAPANESE)
博士論文発表会
11:00-12:15 数理科学研究科棟(駒場) 128号室
Suthichitranont Noppakhun 氏 (東京大学大学院数理科学研究科)
Construction of holomorphic local conformal framed nets(局所共形正則枠付きネットの構成) (JAPANESE)
Suthichitranont Noppakhun 氏 (東京大学大学院数理科学研究科)
Construction of holomorphic local conformal framed nets(局所共形正則枠付きネットの構成) (JAPANESE)
博士論文発表会
13:00-14:15 数理科学研究科棟(駒場) 128号室
糟谷 久矢 氏 (東京大学大学院数理科学研究科)
Topology, symplectic geometry and complex geometry of solvmanifolds -From nilpotent to solvable-(可解多様体のトポロジー、シンプレクティック幾何学および複素幾何学 -冪零から可解へ-) (JAPANESE)
糟谷 久矢 氏 (東京大学大学院数理科学研究科)
Topology, symplectic geometry and complex geometry of solvmanifolds -From nilpotent to solvable-(可解多様体のトポロジー、シンプレクティック幾何学および複素幾何学 -冪零から可解へ-) (JAPANESE)
博士論文発表会
14:15-15:30 数理科学研究科棟(駒場) 128号室
松家 敬介 氏 (東京大学大学院数理科学研究科)
Discretization and ultradiscretization of differential equations preserving characters of their solutions(微分方程式の解の特徴を保った離散化及び超離散化) (JAPANESE)
松家 敬介 氏 (東京大学大学院数理科学研究科)
Discretization and ultradiscretization of differential equations preserving characters of their solutions(微分方程式の解の特徴を保った離散化及び超離散化) (JAPANESE)
2013年02月07日(木)
作用素環セミナー
16:30-18:00 数理科学研究科棟(駒場) 002号室
David Kerr 氏 (東大数理/Texas A&M Univ.)
Combinatorial independence, amenability, and sofic entropy (ENGLISH)
David Kerr 氏 (東大数理/Texas A&M Univ.)
Combinatorial independence, amenability, and sofic entropy (ENGLISH)
博士論文発表会
09:45-11:00 数理科学研究科棟(駒場) 118号室
加藤 直樹 氏 (東京大学大学院数理科学研究科)
Lie foliations transversely modeled on nilpotent Lie algebras(ベキ零リー環を横断構造に持つリー葉層構造について) (JAPANESE)
加藤 直樹 氏 (東京大学大学院数理科学研究科)
Lie foliations transversely modeled on nilpotent Lie algebras(ベキ零リー環を横断構造に持つリー葉層構造について) (JAPANESE)
博士論文発表会
11:00-12:15 数理科学研究科棟(駒場) 118号室
國谷 紀良 氏 (東京大学大学院数理科学研究科)
Mathematical Analysis for Epidemic Models with Heterogeneity(非均質性を備える様々な感染症モデルの数理的解析) (JAPANESE)
國谷 紀良 氏 (東京大学大学院数理科学研究科)
Mathematical Analysis for Epidemic Models with Heterogeneity(非均質性を備える様々な感染症モデルの数理的解析) (JAPANESE)
博士論文発表会
13:00-14:15 数理科学研究科棟(駒場) 118号室
宮谷 和尭 氏 (東京大学大学院数理科学研究科)
MONOMIAL DEFORMATIONS OF CERTAIN HYPERSURFACES AND TWO HYPERGEOMETRIC FUNCTIONS(ある種の超曲面の単項的変形と2種の超幾何函数) (JAPANESE)
宮谷 和尭 氏 (東京大学大学院数理科学研究科)
MONOMIAL DEFORMATIONS OF CERTAIN HYPERSURFACES AND TWO HYPERGEOMETRIC FUNCTIONS(ある種の超曲面の単項的変形と2種の超幾何函数) (JAPANESE)
博士論文発表会
14:15-15:30 数理科学研究科棟(駒場) 118号室
奥田 隆幸 氏 (Guraduate School of Mathematical Sciences the University of Tokyo)
Proper actions and designs on homogeneous spaces(等質空間上の固有な作用とデザイン) (JAPANESE)
奥田 隆幸 氏 (Guraduate School of Mathematical Sciences the University of Tokyo)
Proper actions and designs on homogeneous spaces(等質空間上の固有な作用とデザイン) (JAPANESE)
博士論文発表会
15:45-17:00 数理科学研究科棟(駒場) 118号室
近藤 健一 氏 (東京大学大学院数理科学研究科)
Symmetrized Max-Plus Algebra and Ultradiscrete sine-Gordon Equation(対称Max-Plus代数と超離散sine-Gordon方程式) (JAPANESE)
近藤 健一 氏 (東京大学大学院数理科学研究科)
Symmetrized Max-Plus Algebra and Ultradiscrete sine-Gordon Equation(対称Max-Plus代数と超離散sine-Gordon方程式) (JAPANESE)
博士論文発表会
09:45-11:00 数理科学研究科棟(駒場) 128号室
久本 智之 氏 (東京大学大学院数理科学研究科)
Asymptotic analysis of Bergman kernels for linear series and its application to Kahler Geometry(線形系に対するベルグマン核の漸近解析とケーラー幾何への応用について) (JAPANESE)
久本 智之 氏 (東京大学大学院数理科学研究科)
Asymptotic analysis of Bergman kernels for linear series and its application to Kahler Geometry(線形系に対するベルグマン核の漸近解析とケーラー幾何への応用について) (JAPANESE)
博士論文発表会
11:00-12:15 数理科学研究科棟(駒場) 128号室
松本 佳彦 氏 (東京大学大学院数理科学研究科)
Asymptotically complex hyperbolic Einstein metrics and CR geometry(漸近的複素双曲アインシュタイン計量とCR幾何学) (JAPANESE)
松本 佳彦 氏 (東京大学大学院数理科学研究科)
Asymptotically complex hyperbolic Einstein metrics and CR geometry(漸近的複素双曲アインシュタイン計量とCR幾何学) (JAPANESE)
博士論文発表会
13:00-14:15 数理科学研究科棟(駒場) 128号室
浅井 智朗 氏 (東京大学大学院数理科学研究科)
Analytic semigroup approach to higher order quasilinear parabolic problems(解析半群論の高階準線形放物型方程式への応用) (JAPANESE)
浅井 智朗 氏 (東京大学大学院数理科学研究科)
Analytic semigroup approach to higher order quasilinear parabolic problems(解析半群論の高階準線形放物型方程式への応用) (JAPANESE)
博士論文発表会
14:15-15:30 数理科学研究科棟(駒場) 128号室
三浦 真人 氏 (東京大学大学院数理科学研究科)
Hibi toric varieties and mirror symmetry(日比トーリック多様体とミラー対称性) (JAPANESE)
三浦 真人 氏 (東京大学大学院数理科学研究科)
Hibi toric varieties and mirror symmetry(日比トーリック多様体とミラー対称性) (JAPANESE)
博士論文発表会
15:45-17:00 数理科学研究科棟(駒場) 128号室
石田 智彦 氏 (東京大学大学院数理科学研究科)
Quasi-morphisms on the group of area-preserving diffeomorphisms of the 2-disk(2次元円板の面積保存微分同相群上の擬準同型) (JAPANESE)
石田 智彦 氏 (東京大学大学院数理科学研究科)
Quasi-morphisms on the group of area-preserving diffeomorphisms of the 2-disk(2次元円板の面積保存微分同相群上の擬準同型) (JAPANESE)
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