Liouville symmetry groups and pseudo-isotopies
- 日時
- 2024年6月25日(火)17:00 - 18:30 (JST)
- 講演者
-
- Emmy Murphy (Professor, Princeton University, USA)
- 会場
- 東京大学数理科学研究科数理科学研究科棟 056号室 (メイン会場)
- via Zoom
- 言語
- 英語
- ホスト
- Takashi Tsuboi
Even though Cn is the most basic symplectic manifold, when n>2 its compactly supported symplectomorphism group remains mysterious. For instance, we do not know if it is connected. To understand it better, one can define various subgroups of the symplectomorphism group, and a number of Serre fibrations between them. This leads us to the Liouville pseudo-isotopy group of a contact manifold, important for relating (for instance) compactly supported symplectomorphisms of Cn, and contacomorphisms of the sphere at infinity. After explaining this background, the talk will focus on a new result: that the pseudo-isotopy group is connected, under a Liouville-vs-Weinstein hypothesis.
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