Weak-mixing polygonal billiards
arXiv:1604.06348 · doi:10.1112/blms.12011
Abstract
We consider the set of polygons all of whose sides are vertical or horizontal with fixed combinatorics (for example all the figure "L"s). We show that there is a dense G subset of such polygons such that for each polygon in this G set the billiard flow is weakly-mixing in almost every direction.