On the ergodicity of billiards in non-rational polygons
Also appears in collections : Dynamics and geometry in the Teichmüller space / Dynamique et géométrie dans l'espace de Teichmüller, Exposés de recherche
We will present a geometric criterion for the ergodicity of the billiard flow in a polygon with non-rational angles and discuss its application to the Diophantine case.