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In this article we prove that for a $C^{1+\alpha}$ diffeomorphism on a compact Riemannian manifold, if there is a hyperbolic ergodic measure whose support is not uniformly hyperbolic, then the topological entropy of the set of irregular…

Dynamical Systems · Mathematics 2021-11-17 Xiaobo Hou , Xueting Tian

We show that any measurable solution of the cohomological equation for a H\"older linear cocycle over a hyperbolic system coincides almost everywhere with a H\"older solution. More generally, we show that every measurable invariant…

Dynamical Systems · Mathematics 2018-07-25 Clark Butler

For a class of piecewise hyperbolic maps in two dimensions, we propose a combinatorial definition of topological entropy by counting the maximal, open, connected components of the phase space on which iterates of the map are smooth. We…

Dynamical Systems · Mathematics 2020-03-11 Mark F. Demers

In this paper we consider expansive homeomorphisms of compact spaces with a hyperbolic metric presenting a self-similar behavior on stable and unstable sets. Several application are given related to Hausdorff dimension, entropy,…

Dynamical Systems · Mathematics 2018-01-29 Alfonso Artigue

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

In this paper, we prove that if an area-preserving non-degenerate diffeomorphism on the open disk which extend smoothly to the boundary with non-degeneracy has at least 2 interior periodic points, then there are infinitely many positive…

Symplectic Geometry · Mathematics 2023-07-06 Masayuki Asaoka , Taisuke Shibata

We study several new invariants associated to a holomorphic projective structure on a Riemann surface of finite analytic type: the Lyapunov exponent of its holonomy which is of probabilistic/dynamical nature and was introduced in our…

Geometric Topology · Mathematics 2017-10-18 Bertrand Deroin , Romain Dujardin

We show exact dimensionality of harmonic measures associated with random walks on groups acting on a hyperbolic space under finite first moment condition, and establish the dimension formula by the entropy over the drift. We also treat the…

Probability · Mathematics 2019-02-20 Ryokichi Tanaka

We construct Patterson-Sullivan measure and a natural metric on the unit space of a hyperbolic groupoid. In particular, this gives a new approach to defining SRB measures on Smale spaces using Gromov hyperbolic graphs.

Dynamical Systems · Mathematics 2012-11-19 Volodymyr Nekrashevych

We show, using the Kobayashi and Caratheodory metrics on special holomorphic disks in the universal Teichmuller space, that a wide class of holomorphic functionals on the space of univalent functions in the disk is maximized by the Koebe…

Complex Variables · Mathematics 2012-08-15 Samuel L. Krushkal

Conformally compact asymptotically hyperbolic metrics have been intensively studied. The goal of this note is to understand what intrinsic conditions on a complete Riemannian manifold (M,g) will ensure that g is asymptotically hyperbolic in…

Differential Geometry · Mathematics 2008-07-11 Eric Bahuaud

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

For r > 1, we show, using the Ledrappier-Young entropy characterization of SRB measures for non-invertible maps, that if a C^r map f of the interval or the circle has its Lyapunov exponent greater than 1/r log ||f ' || $\infty$ on a set E…

Dynamical Systems · Mathematics 2024-11-08 Alexandre Delplanque

We study the long-time behavior of almost periodic solutions to stochastic scalar conservation laws in any space dimension, under the assumption of Lipschitz continuity of the flux functions and a non-degeneracy condition. We show the…

Analysis of PDEs · Mathematics 2023-06-16 Claudia Espitia , Hermano Frid , Daniel Marroquin

We examine semiclassical measures for Laplace eigenfunctions on compact hyperbolic $(n+1)$-manifolds. We prove their support must contain the cosphere bundle of a compact immersed totally geodesic submanifold. Our proof adapts the argument…

Analysis of PDEs · Mathematics 2025-04-23 Elena Kim , Nicholas Miller

Let $\Lambda$ be an isolated non-trival transitive set of a $C^1$ generic diffeomorphism $f\in\Diff(M)$. We show that the space of invariant measures supported on $\Lambda$ coincides with the space of accumulation measures of time averages…

Dynamical Systems · Mathematics 2012-03-15 Wenxiang Sun , Xueting Tian

We study fractal properties of invariant graphs of hyperbolic and partially hyperbolic skew product diffeomorphisms in dimension three. We describe the critical (either Lipschitz or at all scales H\"older continuous) regularity of such…

Dynamical Systems · Mathematics 2017-02-22 Lorenzo J. Díaz , Katrin Gelfert , Maik Gröger , Tobias Jäger

The automorphisms of a two-generator free group acting on the space of orientation-preserving isometric actions of on hyperbolic 3-space defines a dynamical system. Those actions which preserve a hyperbolic plane but not an orientation on…

Dynamical Systems · Mathematics 2016-10-11 William Goldman , Greg McShane , George Stantchev , Ser Peow Tan

We analyze a class of deformations of Anosov diffeomorphisms: these $C^0$-small, but $C^1$-macroscopic deformations break the topological conjugacy class but leave the high entropy dynamics unchanged. More precisely, there is a partial…

Dynamical Systems · Mathematics 2011-03-15 Jerome Buzzi , Todd Fisher

We show that, for any compact surface, there is a residual (dense $G_\delta$) set of $C^1$ area preserving diffeomorphisms which either are Anosov or have zero Lyapunov exponents a.e. This result was announced by R. Mane, but no proof was…

Dynamical Systems · Mathematics 2009-12-18 Jairo Bochi