symplectic
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symplectic [2022/05/02 15:03] – kalinin0 | symplectic [2023/03/23 03:31] – kalinin0 | ||
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===== GeNeSys: Geneva-Neuchâtel Symplectic geometry seminar ===== | ===== GeNeSys: Geneva-Neuchâtel Symplectic geometry seminar ===== | ||
+ | ---------------- | ||
+ | |||
+ | **2023, March 21, Tuesday, Université de Neuchâtel** | ||
+ | |||
+ | Patricia Dietzsch (ETH Zürich) | ||
+ | Dehn twists along real Lagrangian spheres | ||
+ | 14h00 | ||
+ | | ||
+ | A major tool in the study of the Dehn twist along a Lagrangian sphere is Seidel' | ||
+ | |||
+ | Cheuk Yu Mak (University of Southampton) | ||
+ | Non-displaceable Lagrangian links in 4 manifolds | ||
+ | 16h00 | ||
+ | |||
+ | One of the earliest fundamental applications of Lagrangian Floer theory is detecting the non-displaceablity of a Lagrangian submanifold. Much progress and generalizations have been made since then but little is known when the Lagrangian submanifold is disconnected. In this talk, we describe a new idea to address this problem. Subsequently, | ||
+ | ---------------- | ||
+ | |||
+ | **2022, October 18, Université de Genève, salle 6-13** | ||
+ | |||
+ | |||
+ | Ilia Itenberg (Sorbonne) | ||
+ | Real enumerative invariants and their refinement | ||
+ | Salle 6-13, 14h15 | ||
+ | |||
+ | **Abstract: | ||
+ | |||
+ | The talk is devoted to several real and tropical enumerative problems. | ||
+ | We suggest new invariants of the projective plane (and, more generally, of toric surfaces) | ||
+ | that arise as results of an appropriate enumeration of real elliptic curves. | ||
+ | These invariants admit a refinement (according to the quantum index) similar to the one introduced by Grigory Mikhalkin in the rational case. | ||
+ | We discuss the combinatorics of tropical counterparts of the elliptic invariants under consideration and establish a tropical algorithm | ||
+ | allowing one to compute them. | ||
+ | This is a joint work with Eugenii Shustin. | ||
---------------- | ---------------- | ||
- | 2022, April 27, Friday, Université de Neuchâtel | + | **2022, September |
+ | |||
+ | |||
+ | Richard Hind (University of Notre Dame) | ||
+ | Obstructing Lagrangian isotopies | ||
+ | Room B107, 14:00 | ||
+ | |||
+ | **Abstract: | ||
+ | |||
+ | I will describe some obstructions to the existence of Lagrangian tori in subsets of Euclidean space, and also to isotopies between the tori. The obstructions come from holomorphic curves and In simple situations are sharp. As a consequence we can derive obstructions to certain 4 dimensional symplectic embeddings, which turn out not to be especially strong, but the analysis does lead to precise statements about stabilized ellipsoid embeddings. Results are taken from joint works with Emmanuel Opshtein, Jun Zhang and Kyler Siegel and Dan Cristofaro-Gardiner. | ||
+ | |||
+ | Joé Brendel (Université de Neuchâtel and Tel Aviv University) | ||
+ | Lagrangian tori in S^2 x S^2 | ||
+ | Room E213, 16:00 | ||
+ | |||
+ | **Abstract: | ||
+ | |||
+ | There is an obvious family of Lagrangian tori in $S^2 \times S^2$, namely those obtained as a product of circles in the factors. We discuss the classification of such product tori up to symplectomorphisms and note that the non-monotone case is qualitatively very different from the monotone one. In the proof, we use a symmetric version of McDuff' | ||
+ | |||
+ | ---------------- | ||
+ | 2022, July 15, Friday, Université de Genève | ||
+ | |||
+ | |||
+ | Kyler Siegel (University of Southern California) | ||
+ | |||
+ | "On the symplectic complexity of affine varieties" | ||
+ | |||
+ | Abstract | ||
+ | |||
+ | Symplectic topology is a framework for studying global features of spaces, lying somewhere between differential topology and algebraic geometry in terms of flexibility versus rigidity. In this talk we introduce a new notion of " | ||
+ | |||
+ | Welcome and lunch. 11h-14h | ||
+ | |||
+ | Lecture 1. 14h-15h | ||
+ | |||
+ | Lecture 2. 15h30. | ||
+ | |||
+ | |||
+ | ---------------- | ||
+ | 2022, April 29, Friday, Université de Neuchâtel | ||
Ligne 14: | Ligne 86: | ||
Unfortunately, | Unfortunately, | ||
While it follows the same overall strategy as Honda-Huang’s proof, | While it follows the same overall strategy as Honda-Huang’s proof, | ||
+ | |||
+ | Welcome and lunch. 12h-14h | ||
Lecture 1. 14h-15h | Lecture 1. 14h-15h |
symplectic.txt · Dernière modification : 2023/11/27 17:55 de slavitya_gmail.com