Robust ergodic properties in partially hyperbolic dynamics

Andersson, Martin

doi:10.1090/S0002-9947-09-05027-2

Robust ergodic properties in partially hyperbolic dynamics
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by Martin Andersson

Trans. Amer. Math. Soc. 362 (2010), 1831-1867

DOI: https://doi.org/10.1090/S0002-9947-09-05027-2

Published electronically: November 18, 2009

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Abstract:

We study ergodic properties of partially hyperbolic systems whose central direction is mostly contracting. Earlier work of Bonatti and Viana (2000) about existence and finitude of physical measures is extended to the case of local diffeomorphisms. Moreover, we prove that such systems constitute a $C^2$-open set in which statistical stability is a dense property. In contrast, all mostly contracting systems are shown to be stable under small random perturbations.

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