English

Long hitting times for expanding systems

Dynamical Systems 2019-08-02 v3

Abstract

We prove a new result in the area of hitting time statistics. Currently, there is a lot of papers showing that the first entry times into cylinders or balls are often faster than the Birkhoff's Ergodic Theorem would suggest. We provide an opposite counterpart to these results by proving that the hitting times into shrinking balls are also often much larger than these theorems would suggest, by showing that for many dynamical systems lim supr0τB(y,r)(x)μ(B(y,r))=+, \displaystyle \limsup_{r\to 0} \tau_{B(y,r)}(x)\mu(B(y,r))=+\infty, for an appropriately large, at least of full measure, set of points yy and xx. We first do this for all transitive open distance expanding maps and Gibbs/equilibrium states of H\"older continuous potentials; in particular for all irreducible subshifts of finite type with a finite alphabet. Then we prove such result for all finitely irreducible subshifts of finite type with a countable alphabet and Gibbs/equilibrium states for H\"older continuous summable potentials. Next, we show that the \emph{limsup} result holds for all graph directed Markov systems (far going natural generalizations of iterated function systems) and projections of aforementioned Gibbs states on their limit sets. By utilizing the first return map techniques, we then prove the \emph{limsup} result for all tame topological Collect--Eckmann multimodal maps of an interval, all tame topological Collect--Eckmann rational functions of the Riemann sphere, and all dynamically semi--regular transcendental meromorphic functions from C\mathbb{C} to C^\widehat{\mathbb{C}}.

Keywords

Cite

@article{arxiv.1812.09231,
  title  = {Long hitting times for expanding systems},
  author = {Łukasz Pawelec and Mariusz Urbański},
  journal= {arXiv preprint arXiv:1812.09231},
  year   = {2019}
}

Comments

arXiv admin note: text overlap with arXiv:1609.03610

R2 v1 2026-06-23T06:53:49.172Z