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Disordered hyperuniform structures are an exotic state of matter having suppressed density fluctuations at large length-scale similar to perfect crystals and quasicrystals but without any long range orientational order. In the past decade,…

Soft Condensed Matter · Physics 2024-11-18 Yusheng Lei , Ran Ni

We prove that for volume preserving, partially hyperbolic, center bunched endomorphisms with constant Jacobian, essential accessibility implies ergodicity.

Dynamical Systems · Mathematics 2025-05-12 Andy Hammerlindl , Audrey Tyler

In this work, we construct Markov structures for zooming systems adapted to holes of a special type. Our construction is based on backward contractions provided by zooming times. These Markov structures may be used to code the open zooming…

Dynamical Systems · Mathematics 2025-03-05 Eduardo Santana

The existence of hyperbolic orbits is proved for a class of singular Hamiltonian systems $\ddot{u}(t)+\nabla V(u(t))=0$ by taking limit for a sequence of periodic solutions which are the variational minimizers of Lagrangian actions.

Classical Analysis and ODEs · Mathematics 2012-07-31 Donglun Wu , Shiqing Zhang

We introduce the notion of nonuniform center bunching for partially hyperbolic diffeomorphims, and extend previous results by Burns--Wilkinson and Avila--Santamaria--Viana. Combining this new technique with other constructions, we prove…

Dynamical Systems · Mathematics 2009-12-18 Artur Avila , Jairo Bochi , Amie Wilkinson

Let M be a closed 3-manifold that supports a partially hyperbolic diffeomorphism f. If $\pi_1(M)$ is nilpotent, the induced action of f on $H_1(M, R)$ is partially hyperbolic. If $\pi_1(M)$ is almost nilpotent or if $\pi_1(M)$ has…

Dynamical Systems · Mathematics 2015-05-14 Kamlesh Parwani

In this paper we revisit uniformly hyperbolic basic sets and the domination of Oseledets splittings at periodic points. We prove that periodic points with simple Lyapunov spectrum are dense in non-trivial basic pieces of Cr-residual…

Dynamical Systems · Mathematics 2016-02-04 Mario Bessa , Jorge Rocha , Paulo Varandas

We show that the stable and unstable sets of non-uniformly hyperbolic horseshoes arising in some heteroclinic bifurcations of surface diffeomorphisms have the value conjectured in a previous work by the second and third authors of the…

Dynamical Systems · Mathematics 2019-03-08 Carlos Matheus , Jacob Palis , Jean-Christophe Yoccoz

We consider diffeomorphisms $f$ with heterodimensional cycles of co-index two, associated with saddles $P$ and $Q$ having unstable indices $\ell$ and $\ell+2$, respectively. In a partially hyperbolic setting, where a two-dimensional center…

Dynamical Systems · Mathematics 2025-11-18 Pablo G. Barrientos , Lorenzo J. Díaz , Yuri Ki , Cristina Lizana , Sebastián A. Pérez

We consider the horocyclic flow corresponding to a (topologically mixing) Anosov flow or diffeomorphism, and establish the uniqueness of transverse quasi-invariant measures with H\"older Jacobians. In the same setting, we give a precise…

Dynamical Systems · Mathematics 2023-04-27 Pablo D. Carrasco , Federico Rodriguez-Hertz

We show that every codimension one partially hyperbolic diffeomorphism must support on $\mathbb{T}^{n}$. It is locally uniquely integrable and derived from a linear codimension one Anosov diffeomorphism. Moreover, this system is…

Dynamical Systems · Mathematics 2022-11-03 Xiang Zhang

We study the thermodynamic formalism of a $C^{\infty}$ non-uniformly hyperbolic diffeomorphism on the 2-torus, known as the Katok map. We prove for a H\"older continuous potential with one additional condition, or the geometric t-potential…

Dynamical Systems · Mathematics 2019-10-18 Tianyu Wang

We study the ergodic theory of non-conservative C^1-generic diffeomorphisms. First, we show that homoclinic classes of arbitrary diffeomorphisms exhibit ergodic measures whose supports coincide with the homoclinic class. Second, we show…

Dynamical Systems · Mathematics 2008-09-22 Flavio Abdenur , Christian Bonatti , Sylvain Crovisier

We study fibered partially hyperbolic diffeomorphisms. We show that as long as certain topological obstructions vanish and as long as homological minimum expansion dominates the distortion on the fibers that a fibered partially hyperbolic…

Dynamical Systems · Mathematics 2025-11-04 Jonathan DeWitt , Meg Doucette , Oliver Wang

By using the variational approach, we prove the existence of Sinai-Ruelle-Bowen measures for partially hyperbolic $\mathcal C^1$ diffeomorphisms with mostly expanding properties. The same conclusion holds true if one considers a dominated…

Dynamical Systems · Mathematics 2024-03-12 David Burguet , Dawei Yang

We show that if an endomorphism $f:\mathbb{T}^2 \to \mathbb{T}^2$ is absolutely partially hyperbolic, then it has a center foliation. Moreover, the center foliation is leaf conjugate to that of its linearization.

Dynamical Systems · Mathematics 2026-01-01 M. Andersson , W. Ranter

We prove that, for $C^1$-generic diffeomorphisms, if the periodic orbits contained in a homoclinic class $H(p)$ have all their Lyapunov exponents bounded away from 0, then $H(p)$ must be (uniformly) hyperbolic. This is in sprit of the works…

Dynamical Systems · Mathematics 2017-09-27 Xiaodong Wang

We show that a class of robustly transitive diffeomorphisms originally described by Ma\~{n}\'{e} are intrinsically ergodic. More precisely we obtain an open set of diffeomorphisms which fail to be uniformly hyperbolic, but nevertheless have…

Dynamical Systems · Mathematics 2009-04-11 Jerome Buzzi , Todd Fisher

For $C^1$ diffeomorphisms with continuous invariant splitting without domination, we prove the existence of (un)stable manifold under the hyperbolicity of invariant measures.

Dynamical Systems · Mathematics 2025-10-28 Yongluo Cao , Zeya Mi , Rui Zou

There is a wealth of results in the literature on the thermodynamic formalism for potentials that are, in some sense, "hyperbolic". We show that for a sufficiently regular one-dimensional map satisfying a weak hyperbolicity assumption,…

Dynamical Systems · Mathematics 2014-03-05 Huaibin Li , Juan Rivera-Letelier