Quantitative recurrence properties of expanding maps

Details Quantitative recurrence properties of expanding maps Quantitative recurrence properties of expanding maps

2007-03-08

arxiv.org/abs/math/0703222v1

Mathematics

Dynamical Systems

57 pages, 2 figures

Scientific paper

Under a map T, a point x recurs at rate given by a sequence {r_n} near a point x_0 if d(T^n(x),x_0)< r_n infinitely often. Let us fix x_0, and consider the set of those x's. In this paper, we study the size of this set for expanding maps and obtain its measure and sharp lower bounds on its dimension involving the entropy of T, the local dimension near x_0 and the upper limit of 1/n log 1/r_n. We apply our results in several concrete examples including subshifts of finite type, Gauss transformation and inner functions.

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