28 may 2014 -- 14:15
Sala Conferenze (Puteano, Centro De Giorgi, Pisa)
Abstract.
We start with the simple (to state) problem on counting special trajectories for billiards in polygons whose angles are multiples of right angles. From here, we go on a journey that involves ergodic theory, algebraic geometry, and enumerative combinatorics. Joint work with A. Eskin and A. Zorich.