Straightening Billiard Trajectories in Flat Disks and Katok-Zemlyakov Construction

11 Apr 2019  ·  Sağlam İsmail ·

We provide a method to straighten each billiard trajectory in a flat disk. As an application, we show that for each point on the disk and for almost all directions, the closure of the corresponding billiard trajectory contains a vertex... We generalize Katok-Zemlyakov construction to the flat disks with rational angle data: for each rational flat disk we obtain a translation surface and a projection to the doubling of the disk. We calculate the Euler characteristics of this translation surface. read more

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Metric Geometry Dynamical Systems