関西作用素環セミナー

Kansai Operator Algebra Seminar


日時:2016年12月10日(土)

場所:大阪教育大学 天王寺分校 西館第4講義室


14:30〜15:30 Sergey Neshveyev

University of Oslo
Graded twisting

abstract : Graded twisting is a simple construction allowing one to construct a new compact quantum group/Hopf algebra (as well as a coaction) from a given compact quantum group (and a coaction). The difference from the well-known twisting by a cocycle is that it can change the representation category, but in a very controlled way. One of the motivating examples is the relation between the quantum SU(2) groups at opposite values of the parameter. In my talk I'll explain the construction and give some examples and applications. (Based on joint work with Makoto Yamashita and Julien Bichon.)
15:45〜16:45 山下 真
 
お茶の水女子大学
Drinfeld center, tube algebra, and representation theory for monoidal categories

abstract : Motivated by recent progress on the approximation properties of quantum groups, we study harmonic analytic aspects of monoidal categories based on the notion of Drinfeld center of ind-objects for rigid C*- tensor categories. The induced unitary representations of the fusion algebra turns out to be the same as the admissible representations considered in a parallel work by Popa and Vaes, and provides a 'global' viewpoint on the connection of approximation properties of quantum groups and of subfactors. We also look at the weak Morita equivalence and the corresponding equivalence of Drinfeld centers, motivated by Schauenburg's work. This suggests a general method to obtain permanence of harmonic analytic properties under such equivalence. Based on joint works with S. Neshveyev.
17:30〜19:30 懇親会
 
全国の日本酒と魚を味わう居酒屋 かのう 天王寺店

参加者名簿(2016/12/07更新)

  1. Sergey Neshveyev
  2. 山下 真
  3. Sara Malacarne
  4. Benoit Collins
  5. 長田 まりゑ
  6. 片山 良一
  7. 河上 哲
  8. 小澤 登高
  9. 縄田 紀夫
  10. 嶌田 洸一
  11. 泉 正己
  12. 武石 拓也
  13. 岡安 類