Ergodicity of two hard balls in integrable polygons
arXiv:math/0310331 · doi:10.1088/0951-7715/17/6/005
Abstract
We prove the hyperbolicity, ergodicity and thus the Bernoulli property of two hard balls in one of the following four polygons: the square, the equilateral triangle, the triangle or the triangle.
30 pages, 1 figure