Quasi-Invariant measures, escape rates and the effect of the hole

Wael Bahsoun; Christopher Bose

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arXiv · 0906.5375

Quasi-Invariant measures, escape rates and the effect of the hole

Wael Bahsoun·Christopher Bose

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Abstract

Let $T$ be a piecewise expanding interval map and $T_H$ be an abstract perturbation of $T$ into an interval map with a hole. Given a number $\ell$, $0<\ell<1$, we compute an upper-bound on the size of a hole needed for the existence of an absolutely continuous conditionally invariant measure (accim) with escape rate not greater than $-\ln(1-\ell)$. The two main ingredients of our approach are Ulam's method and an abstract perturbation result of Keller and Liverani.

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Wael Bahsoun, Christopher Bose. 2009-11-30. Quasi-Invariant measures, escape rates and the effect of the hole. https://arxiv.org/abs/0906.5375

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