Israel Journal of Mathematics

, Volume 226, Issue 1, pp 387–417 | Cite as

Dominated Pesin theory: convex sum of hyperbolic measures

  • Jairo Bochi
  • Christian Bonatti
  • Katrin Gelfert


In the uniformly hyperbolic setting it is well known that the set of all measures supported on periodic orbits is dense in the convex space of all invariant measures. In this paper we consider the converse question, in the non-uniformly hyperbolic setting: assuming that some ergodic measure converges to a convex combination of hyperbolic ergodic measures, what can we deduce about the initial measures?

To every hyperbolic measure μ whose stable/unstable Oseledets splitting is dominated we associate canonically a unique class H(μ) of periodic orbits for the homoclinic relation, called its intersection class. In a dominated setting, we prove that a measure for which almost every measure in its ergodic decomposition is hyperbolic with the same index, such as the dominated splitting, is accumulated by ergodic measures if, and only if, almost all such ergodic measures have a common intersection class.

We provide examples which indicate the importance of the domination assumption.


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© Hebrew University of Jerusalem 2018

Authors and Affiliations

  • Jairo Bochi
    • 1
  • Christian Bonatti
    • 2
  • Katrin Gelfert
    • 3
  1. 1.Facultad de MatemáticasPontificia Universidad Católica de ChileSantiagoChile
  2. 2.Institut de Mathématiques de BourgogneUMR 5584 du CNRS, Université de Bourgogne-Franche ComtéDijon CedexFrance
  3. 3.IM, Universidade Federal do Rio de Janeiro, Cidade UniversitáriaRio de JaneiroBrazil

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