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Ci-dessous, les différences entre deux révisions de la page.

--- symplectic [2022/09/16 15:26] – kalinin0
+++ symplectic [2023/03/23 03:31] – kalinin0
@@ Ligne 1: / Ligne 1: @@
 ===== GeNeSys: Geneva-Neuchâtel Symplectic geometry seminar =====
+----------------
+**2023, March 21, Tuesday, Université de Neuchâtel**
+  Patricia Dietzsch (ETH Zürich)
+  Dehn twists along real Lagrangian spheres
+h00
+A major tool in the study of the Dehn twist along a Lagrangian sphere is Seidel's long exact sequence. This sequence comes with a distinguished element $A$ in the Floer homology group of the Dehn twist. In this talk we will discuss a property of $A$ in case the Dehn twist is a monodromy in a real Lefschetz fibration. We will see that the real structure induces an automorphism on the Floer homology group of the Dehn twist and that $A$ is a fixed point.
+  Cheuk Yu Mak (University of Southampton)
+  Non-displaceable Lagrangian links in 4 manifolds
+h00
+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, we explain how to use Fukaya-Oh-Ohta-Ono and Cho-Poddar theory to show that for every $S2×S2S2×S2$ with a non-monotone product symplectic form, there is a continuum of disconnected, non-displaceable Lagrangian submanifolds such that each connected component is displaceable. This is joint work with Ivan Smith.
+----------------
+**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, September 27, Tuesday, Université de Neuchâtel**