Cari tutti, il prossimo seminario di geometria algebrica e aritmetica di Pisa si terrà mercoledì 24 novembre alle 15:00 in Aula Magna. Programma: ------------------ 15:00--16:00 Andrea Ferraguti (Pisa): Abelian dynamical Galois groups Dynamical Galois groups are invariants associated to dynamical systems generated by the iteration of a self-rational map of P^1. These are still very mysterious objects, and it is conjectured that abelian groups only appear in very special cases. We will show how the problem is deeply related to a dynamical property of these rational maps (namely that of being post-critically finite) and we will explain how to approach and prove certain non-trivial cases of the conjecture. This is based on joint works with A. Ostafe, C. Pagano and U. Zannier. ----------------- Chiederei agli interessati di compilare il seguente semplice modulo Doodle (misure Covid): https://doodle.com/poll/8wvpz7e53m3tghva?utm_source=poll&utm_medium=link Homepage del seminario: http://pagine.dm.unipi.it/tamas/saga.html Migliori saluti, Tamás Szamuely