Operator Algebra Seminars

Seminar information archive ~10/26Next seminarFuture seminars 10/27~

Date, time & place Wednesday 16:30 - 18:00 122Room #122 (Graduate School of Math. Sci. Bldg.)

Seminar information archive

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)

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)
[ 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.

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)

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)

2011/07/21

16:30-18:00   Room #122 (Graduate School of Math. Sci. Bldg.)
Jean Roydor (Univ. Tokyo)
Almost completely isometric maps and applications (ENGLISH)

2011/07/14

16:30-18:00   Room #122 (Graduate School of Math. Sci. Bldg.)
Raphael Ponge (IPMU)
New perspectives for the local index formula in noncommutative geometry (ENGLISH)

2011/06/16

16:30-18:00   Room #122 (Graduate School of Math. Sci. Bldg.)
Yusuke Isono (Univ. Tokyo)
Introduction to rigidity theory of von Neumann algebras (JAPANESE)

2011/06/09

16:30-18:00   Room #122 (Graduate School of Math. Sci. Bldg.)
Hiroaki Yoshida (Ochanomizu Univ.)
On the free Fisher information distance and the free logarithmic Sobolev inequality (JAPANESE)

2011/04/14

16:30-18:00   Room #122 (Graduate School of Math. Sci. Bldg.)
Masayoshi Matsumura (Univ. Tokyo)
Amenable actions and crossed products of $C^*$-algebras (JAPANESE)

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