トポロジー火曜セミナー

過去の記録 ~08/06次回の予定今後の予定 08/07~

開催情報 火曜日 17:00~18:30 数理科学研究科棟(駒場) 056号室
担当者 河野 俊丈, 河澄 響矢, 北山 貴裕, 逆井卓也
セミナーURL http://park.itc.u-tokyo.ac.jp/MSF/topology/TuesdaySeminar/index.html
備考 Tea: 16:30 - 17:00 コモンルーム

2019年03月27日(水)

17:00-18:30   数理科学研究科棟(駒場) 123号室
開催日, 会場にご注意下さい. Tea: Common Room 16:30-17:00
Florian Naef 氏 (Université de Genève)
On a moduli space interpretation of the Turaev cobracket (ENGLISH)
[ 講演概要 ]
Given an oriented surface, Goldman defines a Lie bracket on the vector space spanned by free homotopy classes of loops in terms of intersections. This Lie bracket is the universal version of the Atiyah-Bott Poisson structure on the moduli space of flat connections. Using self-intersections Turaev defines a Lie cobracket on loops. We give a possible interpretation of this structure on moduli spaces of flat connections in the form of a natural BV operator on the moduli space of flat connection with values in a super Lie algebra equipped with an odd pairing. This is joint work with A. Alekseev, J. Pulmann and P. Ševera.