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Operator Algebra Seminars
Seminar information archive ～09/18｜Next seminar｜Future seminars 09/19～
| Date, time & place | Wednesday 16:30 - 18:00 122Room #122 (Graduate School of Math. Sci. Bldg.) |
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Seminar information archive
2013/03/15
13:15-14:15 Room #118 (Graduate School of Math. Sci. Bldg.)
Jean Roydor (Univ. Bordeaux)
Two Amir-Cambern type theorems for $C^*$-algebras (ENGLISH)
Jean Roydor (Univ. Bordeaux)
Two Amir-Cambern type theorems for $C^*$-algebras (ENGLISH)
2013/03/11
09:45-12:00 Room #123 (Graduate School of Math. Sci. Bldg.)
Tristan Bice (York Univ.) 09:45-10:45
Traces and Ultrapowers (ENGLISH)
David Penneys (Univ. Toronto) 11:00-12:00
Constructing subfactors with jellyfish (ENGLISH)
Tristan Bice (York Univ.) 09:45-10:45
Traces and Ultrapowers (ENGLISH)
David Penneys (Univ. Toronto) 11:00-12:00
Constructing subfactors with jellyfish (ENGLISH)
2013/03/11
13:30-18:15 Room #123 (Graduate School of Math. Sci. Bldg.)
Danny Hey (Univ. Toronto) 13:30-14:30
Classification and the Toms-Winter Conjecture (ENGLISH)
Stephen Curran (UCLA) 14:45-15:45
Free probability and planar algebras (ENGLISH)
Rasmus Bentmann (Univ. Copenhagen) 16:00-17:00
Kirchberg $X$-algebras with real rank zero and intermediate cancellation (ENGLISH)
Luis Santiago-Moreno (Univ. Oregon) 17:15-18:15
Classifying $C^*$-algebras up to W-stability (ENGLISH)
Danny Hey (Univ. Toronto) 13:30-14:30
Classification and the Toms-Winter Conjecture (ENGLISH)
Stephen Curran (UCLA) 14:45-15:45
Free probability and planar algebras (ENGLISH)
Rasmus Bentmann (Univ. Copenhagen) 16:00-17:00
Kirchberg $X$-algebras with real rank zero and intermediate cancellation (ENGLISH)
Luis Santiago-Moreno (Univ. Oregon) 17:15-18:15
Classifying $C^*$-algebras up to W-stability (ENGLISH)
2013/02/22
16:30-18:00 Room #118 (Graduate School of Math. Sci. Bldg.)
Stefaan Vaes (KU Leuven)
II$_1$ factors with a unique Cartan subalgebra (ENGLISH)
Stefaan Vaes (KU Leuven)
II$_1$ factors with a unique Cartan subalgebra (ENGLISH)
2013/02/07
16:30-18:00 Room #002 (Graduate School of Math. Sci. Bldg.)
David Kerr (東大数理/Texas A&M Univ.)
Combinatorial independence, amenability, and sofic entropy (ENGLISH)
David Kerr (東大数理/Texas A&M Univ.)
Combinatorial independence, amenability, and sofic entropy (ENGLISH)
2013/01/23
16:30-18:00 Room #118 (Graduate School of Math. Sci. Bldg.)
David Evans (Cardiff University)
Exotic subfactors and conformal field theories (ENGLISH)
David Evans (Cardiff University)
Exotic subfactors and conformal field theories (ENGLISH)
2012/12/26
15:45-18:00 Room #118 (Graduate School of Math. Sci. Bldg.)
Henrik Densing Petersen (Univ. Copenhagen) 15:45-16:45
Trouble in paradise (ENGLISH)
Stella Anevski (Univ. Copenhagen) 17:00-18:00
Algebraic K-theory of generalized schemes (ENGLISH)
Henrik Densing Petersen (Univ. Copenhagen) 15:45-16:45
Trouble in paradise (ENGLISH)
Stella Anevski (Univ. Copenhagen) 17:00-18:00
Algebraic K-theory of generalized schemes (ENGLISH)
2012/12/19
15:45-18:00 Room #118 (Graduate School of Math. Sci. Bldg.)
Mihaita Berbec (KU Leuven) 15:45-16:45
$W^*$-superrigidity for left-right wreath products (ENGLISH)
Zhuang Niu (Univ. Wyoming) 17:00-18:00
A classification of approximate subhomogeneous $C^*$-algebras (ENGLISH)
Mihaita Berbec (KU Leuven) 15:45-16:45
$W^*$-superrigidity for left-right wreath products (ENGLISH)
Zhuang Niu (Univ. Wyoming) 17:00-18:00
A classification of approximate subhomogeneous $C^*$-algebras (ENGLISH)
2012/12/12
16:30-18:00 Room #118 (Graduate School of Math. Sci. Bldg.)
N. Christopher Phillips (Univ. Oregon)
Large subalgebras of crossed product $C^*$-algebras (ENGLISH)
N. Christopher Phillips (Univ. Oregon)
Large subalgebras of crossed product $C^*$-algebras (ENGLISH)
2012/12/05
16:30-18:00 Room #118 (Graduate School of Math. Sci. Bldg.)
Yoh Tanimoto (Univ. Goettingen)
Construction of two dimensional QFT through Longo-Witten endomorphisms (JAPANESE)
Yoh Tanimoto (Univ. Goettingen)
Construction of two dimensional QFT through Longo-Witten endomorphisms (JAPANESE)
2012/11/28
16:30-18:00 Room #118 (Graduate School of Math. Sci. Bldg.)
Norio Nawata (Chiba University)
Fundamental group of simple $C^*$-algebras with unique trace (JAPANESE)
Norio Nawata (Chiba University)
Fundamental group of simple $C^*$-algebras with unique trace (JAPANESE)
2012/05/02
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
Yuhei Suzuki (Univ. Tokyo)
A measurable group theoretic solution to von Neumann's Problem (after Gaboriau and Lyons) (JAPANESE)
Yuhei Suzuki (Univ. Tokyo)
A measurable group theoretic solution to von Neumann's Problem (after Gaboriau and Lyons) (JAPANESE)
2012/04/25
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
Takuya Takeishi (Univ. Tokyo)
Bost-Connes system and class field theory (JAPANESE)
Takuya Takeishi (Univ. Tokyo)
Bost-Connes system and class field theory (JAPANESE)
2012/04/18
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
Koichi Shimada (Univ. Tokyo)
Classification of Group Actions on Factors (after Masuda) (JAPANESE)
Koichi Shimada (Univ. Tokyo)
Classification of Group Actions on Factors (after Masuda) (JAPANESE)
2012/04/11
16:30-18:00 Room #128 (Graduate School of Math. Sci. Bldg.)
Shweta Sharma (Univ. Paris Sud)
Mathematical Aspects of Fractional Quantum Hall Effect (ENGLISH)
Shweta Sharma (Univ. Paris Sud)
Mathematical Aspects of Fractional Quantum Hall Effect (ENGLISH)
2012/03/23
16:30-18:00 Room #117 (Graduate School of Math. Sci. Bldg.)
Alex Kumjian (University of Nevada, Reno)
Higher Rank Graph $C^*$-algebras (ENGLISH)
Alex Kumjian (University of Nevada, Reno)
Higher Rank Graph $C^*$-algebras (ENGLISH)
2012/02/02
16:30-18:00 Room #002 (Graduate School of Math. Sci. Bldg.)
Yusuke Isono (Univ. Tokyo)
Weak Exactness for $C^*$-algebras and Application to Condition (AO) (JAPANESE)
Yusuke Isono (Univ. Tokyo)
Weak Exactness for $C^*$-algebras and Application to Condition (AO) (JAPANESE)
2012/01/26
16:30-18:00 Room #117 (Graduate School of Math. Sci. Bldg.)
Catherine Oikonomides (Univ. Tokyo)
The transverse fundamental class of linear foliations
on torus bundles over the circle (ENGLISH)
Catherine Oikonomides (Univ. Tokyo)
The transverse fundamental class of linear foliations
on torus bundles over the circle (ENGLISH)
2012/01/16
16:30-18:00 Room #117 (Graduate School of Math. Sci. Bldg.)
Narutaka Ozawa (RIMS, Kyoto University)
Is an irng singly generated as an ideal? (JAPANESE)
Narutaka Ozawa (RIMS, Kyoto University)
Is an irng singly generated as an ideal? (JAPANESE)
2012/01/06
16:30-18:00 Room #118 (Graduate School of Math. Sci. Bldg.)
Yasuyuki Kawahigashi (Univ. Tokyo)
Diagrammatical methods in theory of subfactors (ENGLISH)
Yasuyuki Kawahigashi (Univ. Tokyo)
Diagrammatical methods in theory of subfactors (ENGLISH)
2012/01/05
16:30-18:00 Room #117 (Graduate School of Math. Sci. Bldg.)
Yasuyuki Kawahigashi (Univ. Tokyo)
Classification and amenability in theory of von Neumann algebras (ENGLISH)
Yasuyuki Kawahigashi (Univ. Tokyo)
Classification and amenability in theory of von Neumann algebras (ENGLISH)
2011/12/27
14:30-18:00 Room #117 (Graduate School of Math. Sci. Bldg.)
Makoto Yamashita (Universita di Roma "Tor Vergata") 14:30-16:00
Deformation of algebras associated to group cocycles (JAPANESE)
Yoh Tanimoto (Universitaet Goettingen) 16:30-18:00
Construction of wedge-local nets through
Longo-Witten endomorphisms (JAPANESE)
Makoto Yamashita (Universita di Roma "Tor Vergata") 14:30-16:00
Deformation of algebras associated to group cocycles (JAPANESE)
Yoh Tanimoto (Universitaet Goettingen) 16:30-18:00
Construction of wedge-local nets through
Longo-Witten endomorphisms (JAPANESE)
2011/11/22
16:30-18:00 Room #126 (Graduate School of Math. Sci. Bldg.)
Spyridon Michalakis ( Institute for Quantum Information and Matter (Caltech))
Stability of topological phases of matter (ENGLISH)
Spyridon Michalakis ( Institute for Quantum Information and Matter (Caltech))
Stability of topological phases of matter (ENGLISH)
[ Abstract ]
The first lecture will be an introduction to quantum mechanics and a proof of Lieb-Robinson bounds for constant range interaction Hamiltonians. The second lecture will build on the first to prove a powerful lemma on the transformation of the interactions of generic gapped Hamiltonians to a new set of rapidly-decaying interactions that commute with the groundstate subspace. I call this "The Energy Filtering Lemma". Then, the third lecture will be on the construction of the Spectral Flow unitary (Quasi-adiabatic evolution) and its properties; in particular, the perfect simulation of the evolution of the groundstate subspace within a gapped path. I will end with a presentation of the recent result on the stability of the spectral gap for frustration-free Hamiltonians, highlighting how the previous three lectures fit into the proof.
The first lecture will be an introduction to quantum mechanics and a proof of Lieb-Robinson bounds for constant range interaction Hamiltonians. The second lecture will build on the first to prove a powerful lemma on the transformation of the interactions of generic gapped Hamiltonians to a new set of rapidly-decaying interactions that commute with the groundstate subspace. I call this "The Energy Filtering Lemma". Then, the third lecture will be on the construction of the Spectral Flow unitary (Quasi-adiabatic evolution) and its properties; in particular, the perfect simulation of the evolution of the groundstate subspace within a gapped path. I will end with a presentation of the recent result on the stability of the spectral gap for frustration-free Hamiltonians, highlighting how the previous three lectures fit into the proof.
2011/11/17
16:30-18:00 Room #117 (Graduate School of Math. Sci. Bldg.)
Takehiko Yamanouchi (Tokyo Gakugei University)
Hecke pairs in ergodic measured equivalence relations (JAPANESE)
Takehiko Yamanouchi (Tokyo Gakugei University)
Hecke pairs in ergodic measured equivalence relations (JAPANESE)
2011/10/07
16:30-18:00 Room #122 (Graduate School of Math. Sci. Bldg.)
Takeshi Katsura (Keio University)
Towards the classification of non-simple $C^*$-algebras of real rank zero (ENGLISH)
Takeshi Katsura (Keio University)
Towards the classification of non-simple $C^*$-algebras of real rank zero (ENGLISH)
