Séance du 1er décembre 2017

Lieu: IHP, salle 201



11:00  Jaime Bustillo (ENS)
Middle-dimensional symplectic rigidity. 
Abstract: In this talk I will discuss a middle dimensional generalization of Gromov's nonsqueezing theorem. I will explain how Viterbo's capacities can be used to find middle-dimensional rigidity for the image of coisotropic cylinders by certain types of Hamiltonian diffeomorphisms. Moreover, we will see that this type of rigidity also appears in infinite-dimensional settings associated to certain types of Hamiltonian PDEs. As a particular example this result can be applied to the Sine-Gordon equation.
 
14:15 Paul Biran (ETH Zurich) 
Geometric and Algebraic Measurements in Lagrangian Topology 1

16:00  Paul Biran (ETH Zurich)  
Geometric and Algebraic Measurements in Lagrangian Topology 2




Prochaines séances: 09/02 (J.F. Barraud, ?, ?), 09/03 (A. Keating, A. Moreno, J. Solomon)
 

Autre activité symplectique à Paris:
- Séminaire Nantes-Orsay.

Séance du 10 novembre 2017

Lieu (Attention, lieu inhabituel!): Jussieu, salle 15-25-413

Pas de séminaire le matin ( exposé d' Alexander Givental ici et exposé de Valentine Roos ici )

14:15  Richard Siefring (Bochum) 
Symplectic field theory and codimension-2 stable Hamiltonian submanifolds. 
Abstract: Motivated by the goal of establishing a "symplectic sum formula" in symplectic field theory, we will discuss the intersection behavior between punctured pseudoholomorphic curves and certain symplectic hypersurfaces in a symplectization.  In particular we will show that the count of such intersections is always bounded from above by a finite, topologically-determined quantity even though the curve, the target manifold, and the symplectic hypersurface in question are all noncompact.



16:00  Kathrin Näf (Zurich)  

Translated points on dynamically convex contact manifolds.
 Abstract: In this talk I will explain how for a contact manifold the existence of a
dynamically convex supporting contact form ensures compactness of Floer moduli spaces
and thus allows us to define Rabinowitz Floer homology in a symplectisation. In this
setting, the Rabinowitz Floer homology groups give a means to deduce existence results
for translated points as introduced by Sandon. Part of this is joint work with Matthias
Meiwes.



Prochaines séances: 1/12 (P. Biran, J. Bustillo), 02/02 ( ?, ? ,? ), 09/03 (A. Keating, ?, ?)


Autre activité symplectique à Paris:
- Séminaire Nantes-Orsay

- HDR V. Humilière le 16/11, 14h00, salle 15-25-502 à Jussieu.