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5 papers · 2 filters
Does a billiard orbit determine its (polygonal) table?
Jozef Bobok, Serge Troubetzkoy
We introduce a new equivalence relation on the set of all polygonal billiards. We say that two billiards (or polygons) are order equivalent if each of the billiards has an orbit wh…
Dichotomy for the Hausdorff dimension of the set of nonergodic directions
Yitwah Cheung, Pascal Hubert, Howard Masur
We consider billiards in a (1/2)-by-1 rectangle with a barrier midway along a vertical side. Let NE be the set of directions theta such that the flow in direction theta is not ergo…
Constant-length substitutions and countable scrambled sets
François Blanchard, Fabien Durand, Alejandro Maass
In this paper we provide examples of topological dynamical systems having either finite or countable scrambled sets. In particular we study conditions for the existence of Li-Yorke…
Infinite sequence of fixed point free pseudo-Anosov homeomorphisms
Jérôme Los
We construct infinite sequences of pseudo-Anosov homeomorphisms without fixed points and leaving invariant a sequence of orientable measured foliations on the same topological surf…
Finite type coarse expanding conformal dynamics
Peter Haïssinsky, Kevin M. Pilgrim
We continue the study of non-invertible topological dynamical systems with expanding behavior. We introduce the class of {\em finite type} systems which are characterized by the co…