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Operator Algebra Seminars
Seminar information archive ～01/23｜Next seminar｜Future seminars 01/24～
| Date, time & place | Wednesday 16:30 - 18:00 122Room #122 (Graduate School of Math. Sci. Bldg.) |
|---|
Seminar information archive
2009/12/17
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
佐藤康彦 (北海道大理)
Almost commuting unitaries and ${\\mathbb{Z}}^2$-action
佐藤康彦 (北海道大理)
Almost commuting unitaries and ${\\mathbb{Z}}^2$-action
2009/12/10
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
張欽 (東大数理)
Symmetric norms and spaces of operators modelled on a semifinite von Neumann algebra
張欽 (東大数理)
Symmetric norms and spaces of operators modelled on a semifinite von Neumann algebra
2009/12/03
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
見村万佐人 (東大数理)
Vanishing of quasi-homomorphisms and the stable commutator
lengths on special linear groups over euclidean rings
見村万佐人 (東大数理)
Vanishing of quasi-homomorphisms and the stable commutator
lengths on special linear groups over euclidean rings
2009/11/12
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
酒匂宏樹 (東大数理)
Recent results for amalgamated free products of type II$_1$ factors
酒匂宏樹 (東大数理)
Recent results for amalgamated free products of type II$_1$ factors
2009/10/29
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
Robert Coquereaux (CNRS/CPT, Marseille)
Fusion graphs for Lie groups at level k and quantum symmetries
Robert Coquereaux (CNRS/CPT, Marseille)
Fusion graphs for Lie groups at level k and quantum symmetries
2009/10/22
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
Adam Skalski (Lancaster University)
On some questions related to Voiculescu's noncommutative topological entropy
Adam Skalski (Lancaster University)
On some questions related to Voiculescu's noncommutative topological entropy
2009/09/07
17:00-18:30 Room #056 (Graduate School of Math. Sci. Bldg.)
Marek Bozejko (University of Wroclaw)
Generalized Gaussian field, theta function of Jacobi and functor of second quantization
Marek Bozejko (University of Wroclaw)
Generalized Gaussian field, theta function of Jacobi and functor of second quantization
2009/07/23
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
Catherine Oikonomides (慶応大理工)
Cyclic cohomology and the Novikov conjecture
Catherine Oikonomides (慶応大理工)
Cyclic cohomology and the Novikov conjecture
2009/07/16
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
Ingo Runkel (King's College London)
Algebraic structures in conformal field theory
Ingo Runkel (King's College London)
Algebraic structures in conformal field theory
[ Abstract ]
It turned out to be fruitful to isolate questions in CFT which can be formulated in a purely categorical fashion. The way left and right moving degrees of freedom can be combined to a consistent theory is an example of this, the relevant structure being a commutative symmetric Frobenius algebra. This is true independently of whether CFT is formulated via sewing of surfaces or nets of operator algebras. Another example is modular invariance, which has a surprising alternative formulation as a certain maximality condition.
It turned out to be fruitful to isolate questions in CFT which can be formulated in a purely categorical fashion. The way left and right moving degrees of freedom can be combined to a consistent theory is an example of this, the relevant structure being a commutative symmetric Frobenius algebra. This is true independently of whether CFT is formulated via sewing of surfaces or nets of operator algebras. Another example is modular invariance, which has a surprising alternative formulation as a certain maximality condition.
2009/07/09
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
Mikael Pichot (東大数物連携宇宙研究機構)
Examples of groups of intermediate rank
Mikael Pichot (東大数物連携宇宙研究機構)
Examples of groups of intermediate rank
2009/07/02
17:00-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
小沢登高 (東大数理)
Dixmier's Similarity Problem ---Littlewood and Forests--- (一般の数学者向け)
小沢登高 (東大数理)
Dixmier's Similarity Problem ---Littlewood and Forests--- (一般の数学者向け)
2009/06/25
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
鈴木章斗 (九州大学数理学研究院)
Infrared divergence of scalar quantum field model on pseudo Riemann manifold
鈴木章斗 (九州大学数理学研究院)
Infrared divergence of scalar quantum field model on pseudo Riemann manifold
2009/06/18
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
河東泰之 (東大数理)
The super Virasoro algebra and noncommutative geometry
河東泰之 (東大数理)
The super Virasoro algebra and noncommutative geometry
2009/06/11
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
Chris Heunen (Radboud Universiteit Nijmegen)
A topos for algebraic quantum theory
Chris Heunen (Radboud Universiteit Nijmegen)
A topos for algebraic quantum theory
2009/06/04
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
中神祥臣 (日本女子大)
Determinant for rectangular martices
中神祥臣 (日本女子大)
Determinant for rectangular martices
2009/05/28
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
佐藤康彦 (北大理)
The Rohlin property for automorphisms of the Jiang-Su algebra
佐藤康彦 (北大理)
The Rohlin property for automorphisms of the Jiang-Su algebra
2009/05/14
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
Raphael Ponge (東大数理)
Noncommutative geometry and lower dimensional volumes in Riemannian and CR geometry
Raphael Ponge (東大数理)
Noncommutative geometry and lower dimensional volumes in Riemannian and CR geometry
2009/05/07
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
見村万佐人 (東大数理)
A fixed point property and the Kazhdan property of
$SL(n, \\mathbb{Z} [X_1, \\ldots , X_k])$ for Banach spaces
見村万佐人 (東大数理)
A fixed point property and the Kazhdan property of
$SL(n, \\mathbb{Z} [X_1, \\ldots , X_k])$ for Banach spaces
2009/04/30
16:30-18:00 Room #056 (Graduate School of Math. Sci. Bldg.)
酒匂宏樹 (東大数理)
Measure Equivalence Rigidity and Bi-exactness of Groups
酒匂宏樹 (東大数理)
Measure Equivalence Rigidity and Bi-exactness of Groups
2009/04/23
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
内藤克利 (首都大)
Entire Cyclic Cohomology of Noncommutative 2-Tori
内藤克利 (首都大)
Entire Cyclic Cohomology of Noncommutative 2-Tori
2009/04/16
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
緒方芳子 (東大数理)
Large Deviations in Quantum Spin Chains
緒方芳子 (東大数理)
Large Deviations in Quantum Spin Chains
2009/04/09
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
Dietmar Bisch (Vanderbilt University)
Bimodules, planarity and freeness
Dietmar Bisch (Vanderbilt University)
Bimodules, planarity and freeness
2009/01/22
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
関根良紹 (東大数理)
On the electron-phonon interacting system
関根良紹 (東大数理)
On the electron-phonon interacting system
2009/01/15
16:30-18:00 Room #126 (Graduate School of Math. Sci. Bldg.)
Alin Ciuperca (Univ. Toronto)
Isomorphism of Hilbert modules over stably finite $C^*$-algebras
Alin Ciuperca (Univ. Toronto)
Isomorphism of Hilbert modules over stably finite $C^*$-algebras
2009/01/15
16:30-18:00 Room #126 (Graduate School of Math. Sci. Bldg.)
Alin Ciuperca (Univ. Toronto)
Isomorphism of Hilbert modules over stably finite $C^*$-algebras
Alin Ciuperca (Univ. Toronto)
Isomorphism of Hilbert modules over stably finite $C^*$-algebras
