Abstract:
Consider a billiard in a polygon $Q\subset R^2$ having all angles commensurate with $\pi$. For the majority of initial directions, density of every infinite semitrajectory in configuration space is proved. Also proved is the typicality of polygons for which some billiard trajectory is dense in phase space.
Citation:
A. N. Zemlyakov, A. B. Katok, “Topological transitivity of billiards in polygons”, Mat. Zametki, 18:2 (1975), 291–300; Math. Notes, 18:2 (1975), 760–764
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