More ergodic billiards with an infinite cusp

Details More ergodic billiards with an infinite cusp More ergodic billiards with an infinite cusp

2002-01-27

arxiv.org/abs/nlin/0201052v1

Chaos 13 (2003), no. 1, 105-111

Nonlinear Sciences

Chaotic Dynamics

13 pages, 4 figures

Scientific paper

10.1063/1.1539802

In a previous paper (nlin.CD/0107041) the following class of billiards was studied: For $f: [0, +\infty) \longrightarrow (0, +\infty)$ convex, sufficiently smooth, and vanishing at infinity, let the billiard table be defined by $Q$, the planar domain delimited by the positive $x$-semiaxis, the positive $y$-semiaxis, and the graph of $f$. For a large class of $f$ we proved that the billiard map was hyperbolic. Furthermore we gave an example of a family of $f$ that makes this map ergodic. Here we extend the latter result to a much wider class of functions.

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