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Invariant measures for Anosov maps with small holes

Published online by Cambridge University Press:  01 August 2000

N. CHERNOV
Affiliation:
Department of Mathematics, University of Alabama at Birmingham, Birmingham, AL 35294, USA
R. MARKARIAN
Affiliation:
Instituto de Matemática y Estadística ‘Prof. Ing. Rafael Laguardia’ Facultad de Ingeniería, Universidad de la República, C.C. 30, Montevideo, Uruguay
S. TROUBETZKOY
Affiliation:
Department of Mathematics, University of Alabama at Birmingham, Birmingham, AL 35294, USA

Abstract

We study Anosov diffeomorphisms on surfaces with small holes. The points that are mapped into the holes disappear and never return. In our previous paper we proved the existence of a conditionally invariant measure $\mu_+$. Here we show that the iterations of any initially smooth measure, after renormalization, converge to $\mu_+$. We construct the related invariant measure on the repeller and prove that it is ergodic and K-mixing. We prove the escape rate formula, relating the escape rate to the positive Lyapunov exponent and the entropy.

Type
Research Article
Copyright
2000 Cambridge University Press

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