Buongiorno, Vi segnalo che Serge Cantata (CNRS, Université de Rennes) terrà il prossimo seminario di Geometria domani Martedì 21 ottobre alle ore 11:00 presso l'aula Seminari. Allego titolo e abstract Titolo: Dynamics on the Markov surface Abstract: The Markov surface parametrizes certain representations of the free group of rank 2 in the group of matrices SL_2. The group of automorphisms of the free group acts on this algebraic surface by polynomial automorphisms. I will describe some dynamical properties of this action. This is related to hyperbolic geometry and holomorphic dynamics. A presto Filippo