We discuss the distance functions on spaces of volume-preserving diffeomorphisms arising from Arnol'd's geometric interpretation of hydrodynamics of an ideal incompressible fluid, and present recent results on their large-scale properties.

Date :              Vendredi le 22 janvier 2016

Heure :            10h00 à 11h00

Lieu :               Pavillon André-Aisenstadt

Salle :              6214