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We prove the finiteness of ergodic measures of maximal entropy for partially hyperbolic diffeomorphisms where the center direction has a dominated decomposition into one dimensional bundle and there is a uniform lower bound for the absolute…

Dynamical Systems · Mathematics 2025-02-27 Juan Carlos Mongez , Maria José Pacifico , Mauricio Poletti

We obtain the following dichotomy for accessible partially hyperbolic diffeomorphisms of 3-dimensional manifolds having compact center leaves: either there is a unique entropy maximizing measure, this measure has the Bernoulli property and…

Dynamical Systems · Mathematics 2010-10-19 F. Rodriguez Hertz , M. A. Rodriguez Hertz , A. Tahzibi , R. Ures

We consider partially hyperbolic diffeomorphisms $f$ with a one-dimensional central direction such that the unstable entropy exceeds the stable entropy. Our main result proves that such maps have a finite number of ergodic measures of…

Dynamical Systems · Mathematics 2024-05-09 Juan Carlos Mongez , Maria Jose Pacifico

In this paper we establish a dichotomy for the ergodic measures of maximal entropy for partially hyperbolic diffeomorphisms with one-dimensional compact center leaves which are virtually skew products over (transitive) Anosov homeomorphism.…

Dynamical Systems · Mathematics 2024-04-05 Ali Tahzibi , Richard Cubas

We study nonhyperbolic and transitive partially hyperbolic diffeomorphisms having a one-dimensional center. We prove joint flexibility with respect to entropy and center Lyapunov exponent for a broad class of these systems. Flexibility…

Dynamical Systems · Mathematics 2025-05-07 Lorenzo J. Díaz , Katrin Gelfert , Michal Rams , Jinhua Zhang

We show that time-one maps of transitive Anosov flows of compact manifolds are accumulated by diffeomorphisms robustly satisfying the following dichotomy: either all of the measures of maximal entropy are non-hyperbolic, or there are…

Dynamical Systems · Mathematics 2020-12-09 Jérôme Buzzi , Todd Fisher , Ali Tahzibi

We construct measures of maximal $u$-entropy for any partially hyperbolic diffeomorphism that factors over an Anosov torus automorphism and has mostly contracting center direction. The space of such measures has a finite dimension, and its…

Dynamical Systems · Mathematics 2020-11-06 Raul Ures , Marcelo Viana , Fan Yang , Jiagang Yang

We study $C^1$-robustly transitive and nonhyperbolic diffeomorphisms having a partially hyperbolic splitting with one-dimensional central bundle whose strong un-/stable foliations are both minimal. {In dimension $3$, an important class of…

Dynamical Systems · Mathematics 2019-06-20 Lorenzo J. Díaz , Katrin Gelfert , Bruno Santiago

In this paper, we study the number of ergodic measures of maximal entropy for partially hyperbolic diffeomorphisms defined on $3-$torus with compact center leaves. Assuming the existence of a periodic leaf with Morse-Smale dynamics we prove…

Dynamical Systems · Mathematics 2021-06-08 Joas Elias Rocha , Ali Tahzibi

We prove the hyperbolicity of ergodic maximal entropy measures for a class of partially hyperbolic diffeomorphisms of $\mathbb{T}^{d}$, which have a compact two-dimensional center foliation.

Dynamical Systems · Mathematics 2023-06-21 Carlos F. Álvarez

A deep analysis of the Lyapunov exponents, for stationary sequence of matrices going back to Furstenberg, for more general linear cocycles by Ledrappier and generalized to the context of non-linear cocycles by Avila and Viana, gives an…

Dynamical Systems · Mathematics 2017-05-16 Ali Tahzibi , Jiagang Yang

We show that $C^\infty$ surface diffeomorphisms with positive topological entropy have at most finitely many ergodic measures of maximal entropy in general, and at most one in the topologically transitive case. This answers a question of…

Dynamical Systems · Mathematics 2019-01-18 Jérôme Buzzi , Sylvain Crovisier , Omri Sarig

In this paper, we provide an upper bound on the number of maximal entropy ergodic measures with zero Lyapunov exponent for topologically transitive partially hyperbolic diffeomorphisms with compact one-dimensional center leaves on…

Dynamical Systems · Mathematics 2025-10-06 Jorge Crisostomo , Richard Cubas

In this work we obtain a new criterion to establish ergodicity and non-uniform hyperbolicity of smooth measures of diffeomorphisms. This method allows us to give a more accurate description of certain ergodic components. The use of this…

Dynamical Systems · Mathematics 2019-12-19 F. Rodriguez Hertz , Jana Rodriguez Hertz , A. Tahzibi , R. Ures

The statistical properties of mostly expanding partially hyperbolic diffeomorphisms have been substantially studied. In this paper, we would like to address the entropy properties of mostly expanding partially hyperbolic diffeomorphisms. We…

Dynamical Systems · Mathematics 2024-01-24 Jinhua Zhang

We show that the metric entropy of a $C^1$ diffeomorphism with a dominated splitting and the dominating bundle uniformly expanding is bounded from above by the integrated volume growth of the dominating (expanding) bundle plus the maximal…

Dynamical Systems · Mathematics 2012-02-09 Radu Saghin

The (measure-theoretical) entropy of a diffeomorphism along an expanding invariant foliation is the rate of complexity generated by the diffeomorphism along the leaves of the foliation. We prove that this number varies upper…

Dynamical Systems · Mathematics 2018-12-13 Jiagang Yang

We study the amount of nonhyperbolicity within a broad class of (nonhyperbolic) partially hyperbolic diffeomorphisms with a one-dimensional center. For that, we focus on the center Lyapunov exponent and the entropy of its level sets. We…

Dynamical Systems · Mathematics 2024-05-21 Lorenzo J. Díaz , Katrin Gelfert , Jinhua Zhang

We prove for $C^\infty$ non-singular flows on three-dimensional compact manifolds with positive entropy, there are at most finitely many ergodic measures of maximal entropy. This result extends the notable work of Buzzi-Crovisier-Sarig…

Dynamical Systems · Mathematics 2025-03-28 Yuntao Zang

We show that $\mathcal{C}^{\infty}$ local diffeomorphisms of closed surfaces whose topological entropy is larger than the logarithm of their degree admit a finite number of ergodic measures of maximal entropy. To do this, we construct…

Dynamical Systems · Mathematics 2025-11-18 Matéo Ghezal
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