**(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.