Navigation Area
 News

Events

Research seminars
 Algebraic geometry and moduli seminar
 Analysis seminar
 Fin & math doc seminar
 Geometry seminar
 ITS informal analytic number theory Seminar
 Number theory seminar
 Optimization and applications seminar
 Seminar on stochastic processes
 Statistics research seminar
 Current Subcategory: Symplectic geometry seminar
 Talks in financial and insurance mathematics
 Talks in mathematical physics
 ZüKoSt Zürcher Kolloquium über Statistik
 Zurich colloquium in applied and computational mathematics
 Zurich colloquium in mathematics
 Doctoral examinations
 Inaugural and farewell lectures
 Heinz Hopf Prize and Lectures
 Wolfgang Pauli Lectures
 Paul Bernays Lectures
 Conferences and workshops

Research seminars
 Awards and honours
Symplectic geometry seminar
Main content
Spring Semester 2017
Note: The highlighted event marks the next occurring event.
Date / Time  Speaker  Title  Location  

20 February 2017 15:1516:30 
no seminar  HG G 43  
27 February 2017 15:1516:30 
Claire Voisin Jussieu and ITS 
HyperKähler manifolds and their moduli  HG G 43  
6 March 2017 15:1516:30 
Felix Schlenk Université de Neuchâtel 
Symplectic rigidity and flexibility, old and new  HG G 43  
Abstract: We look at the following chain of symplectic embedding problems in dimension four. E(1,a) \to Z^4(A), E(1,a) \to P(A,bA) (b \in \NN), E(1,a) \to T^4(A). Here $E(1,a)$ is a symplectic ellipsoid, $Z^4(A)$ is the symplectic cylinder $D^2(A) \times R^2$, $P(A,bA) = D^2(A) \times D^2(bA)$ is the polydisc, and $T^4(A) = T^2(A) \times T^2(A)$, where $T^2(A)$ is the torus of area $A$. In each problem we ask for the smallest $A$ for which $E(1,a)$ symplectically embeds. The answer is very different in each case: total rigidity, total flexibility, and a twofold subtle transition between them. The talk is based on works by CristofaroGardiner, Frenkel, Latschev, McDuff, Müller and myself.  
13 March 2017 15:1516:30 
Samuel Trautwein ETH Zürich 
YangMillsHiggs flow and GIT for the vortex equation  HG G 43  
Abstract: The symplectic vortex equations admit a variational description as global minimum of the YangMillsHiggs functional. We discuss convergence of its gradient flow on holomorphic pairs and explain how this can be used to obtain several results inspired by finite dimensional GIT: The analogue of the Ness uniqueness theorem, the momentweight inequality, the Kempf existence and uniqueness theorem and an extension of Mundet's KobayashiHitchin correspondence to the polystable and semistable case.  
20 March 2017 15:1516:30 
Charel Antony ETH Zürich 
Gradient flows near birthdeath critical points and adiabatic limits  HG G 43  
Abstract: In connecting two Morse functions on a manifold by a smooth family of functions, the concept of birthdeath critical points (BDCP) appears naturally. On the level of critical points, we see two critical points running into each other and then disappearing (or dying) as we vary the parameter near the BDCP. After some definitions and a normal form for BDCP, we will discuss the existence and uniqueness of gradient flow lines connecting the two critical points near such a BDCP and how adiabatic limit techniques enter in the analysis of the problem.  
27 March 2017 15:1516:30 
no seminar  HG G 43  
3 April 2017 15:1516:30 
Claude Viterbo ENS Paris 
Floer homology for Lagrangian quantization  HG G 43  
Abstract: We explain how, given an exact spin Lagrangian $L$, in $T^*N$, Floer homology and rectification of quasipresheaves allow one to construct a sheaf $F_L$ on $N\times R$ with singular support the conification of $L$. We show how filtered Floer homology of $L_1,L_2$ is recovered from the sheaves $F_{L1}, F_{L_2}$.  
10 April 2017 15:1516:30 
Dr. Doris Hein Universität Freiburg 
Local invariant Morse theory and applications in Hamiltonian dynamics  HG G 43  
Abstract: Local homology is a useful tool to study periodic orbits. For example, the key to the existence of infinitely many periodic orbits of Hamiltonian systems are properties of the local Floer homology of one special orbit. I will discuss a discrete version of this invariant constructed using local invariant Morse homology of a discrete action function. The construction is very geometric and relies on a handson description of invariant local Morse homology. The resulting local homology can be interpreted as an invariant of germs of Hamiltonian systems or of closed Reeb orbits. It has properties similar to those of local Floer homology in the symplectic setting and probably similar applications in dynamics.  
17 April 2017 15:1516:30 
no seminar (easter monday)  HG G 43  
24 April 2017 15:1516:30 
no seminar (sechselaeuten)  HG G 43  
1 May 2017 15:1516:30 
no seminar (tag der arbeit)  HG G 43  
8 May 2017 15:1516:30 
Prof. Dr. William John Merry ETH Zurich, Switzerland 
Maximum Principles in Symplectic Homology  HG G 43  
15 May 2017 15:1516:30 
Vadim Kaloshin University of Maryland and ITS 
On the local Birkhoff Conjecture for convex planar billiards  HG G 43  
Abstract: The classical Birkhoff conjecture states that the only integrable convex planar domains are circles and ellipses. We show that this conjecture is true for perturbations of ellipses. This is based on several papers with Avila, De Simoi, G. Huang, Sorrentino.  
29 May 2017 15:1516:30 
no seminar  HG G 43 
Archive: SS 17 AS 16 SS 16 AS 15 SS 15 AS 14 SS 14 AS 13 SS 13 AS 12 SS 12 AS 11 SS 11 AS 10 SS 10 AS 09 WS 03/04