Prochainement

Pas d'événement prévu ce mois

Passés

Vendredi 19 octobre 15:30-16:30 Jaime Bustillo  (ENS Paris)
A coisotropic non-squeezing theorem in symplectic geometry

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Lieu : Université de Nantes, Laboratoire de Mathématiques Jean Leray, salle Eole

Résumé : I will explain how generating functions and Viterbo’s capacities can be used to prove a coisotropic non-squeezing theorem for Hamiltonian diffeomorphisms of $\mathbbR^2n$ generated by sub-quadratic Hamiltonians H. We will then see the relation of this theorem with the middle dimensional symplectic rigidity problem. If I have time, I will briefly explain how this type of rigidity appears in the context of Hamiltonian PDEs or $C^0$ symplectic geometry.

A coisotropic non-squeezing theorem in symplectic geometry  Version PDF

Vendredi 19 octobre 14:00-15:00 Egor Shelukhin  (Montréal)
On the Lagrangian spectral norm and barcodes

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Lieu : Université de Nantes, Laboratoire de Mathématiques Jean Leray, salle Eole

Résumé : We discuss upper and lower bounds on the spectral norm in
Lagrangian Floer theory, their implications for the associated
barcodes, and additional applications. This talk is partially based on
joint work with Asaf Kislev.

On the Lagrangian spectral norm and barcodes  Version PDF