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Journal of the American Mathematical Society
Journal of the American Mathematical Society
ISSN 1088-6834(online) ISSN 0894-0347(print)

 

Symbolic dynamics for surface diffeomorphisms with positive entropy


Author: Omri M. Sarig
Journal: J. Amer. Math. Soc. 26 (2013), 341-426
MSC (2010): Primary 37D25; Secondary 37D35
Published electronically: November 26, 2012
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Abstract: Let $ f$ be a $ C^{1+\varepsilon }$ diffeomorphism on a compact smooth surface with positive topological entropy $ h$. For every $ 0<\delta <h$, we construct an invariant Borel set $ E$ and a countable Markov partition for the restriction of $ f$ to $ E$ in such a way that $ E$ has full measure with respect to every ergodic invariant probability measure with entropy greater than $ \delta $. The following results follow: $ f$ has at most countably many ergodic measures of maximal entropy (a conjecture of J. Buzzi), and in the case when $ f$ is $ C^\infty $, $ \limsup \limits _{n\to \infty }e^{-n h}\char93 \{x:f^n(x)=x\}>0$ (a conjecture of A. Katok).


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Additional Information

Omri M. Sarig
Affiliation: Faculty of Mathematics and Computer Science, The Weizmann Institute of Science, 234 Herzl Street, POB 26, Rehovot 76100, Israel
Email: omsarig@gmail.com

DOI: http://dx.doi.org/10.1090/S0894-0347-2012-00758-9
PII: S 0894-0347(2012)00758-9
Keywords: Markov partitions, symbolic dynamics, periodic points, Lyapunov exponents
Received by editor(s): January 21, 2011
Received by editor(s) in revised form: September 2, 2012
Published electronically: November 26, 2012
Additional Notes: This work was partially supported by the NSF grant DMS–0400687 and by the ERC award ERC-2009-StG no. 239885
Article copyright: © Copyright 2012 American Mathematical Society
The copyright for this article reverts to public domain 28 years after publication.