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We give a formula to estimate the number of fixed points of a pseudo-Anosov homeomorphism of a surface. When the homeomorphism satisfies a mild property called strong irreducibility, the log of the number of fixed points is coarsely equal…

Geometric Topology · Mathematics 2026-04-16 Tarik Aougab , David Futer , Samuel J. Taylor

We introduce the notion of a pseudo-Anosov contact structure, which admits a type of singular contact form with pseudo-Anosov Reeb flow. We prove that contact homology detects the free homotopy classes of closed orbits of any pseudo-Anosov…

Symplectic Geometry · Mathematics 2026-01-06 Julian Chaidez , Yijie Pan

Normalizing Flows provide a principled framework for high-dimensional density estimation and generative modeling by constructing invertible transformations with tractable Jacobian determinants. We propose Fractal Flow, a novel normalizing…

Machine Learning · Statistics 2025-08-28 Binhui Zhang , Jianwei Ma

We prove that a $C^2$-generic Riemannian metric on a closed surface has either an elliptic closed geodesic or an Anosov geodesic flow. As a consequence, we prove the $C^2$-stability conjecture for Riemannian geodesic flows of closed…

Dynamical Systems · Mathematics 2024-05-17 Gonzalo Contreras , Marco Mazzucchelli

We prove that divergent, extended geometrically finite (in the sense of Weisman arXiv:2205.07183) representations can be interpreted as restricted Anosov (in the sense of Tholozan--Wang arXiv:2307.02934) representations over certain flow…

Geometric Topology · Mathematics 2026-04-20 Tianqi Wang

In this article we study the anisotropic curve shortening flow for a planar network of three curves with fixed endpoints and which meet in a triple junction. We show that the anisotropic curvature energy fulfills a Lojasiewicz-Simon…

Analysis of PDEs · Mathematics 2023-10-10 Michael Gößwein , Matteo Novaga , Paola Pozzi

We give complete classification of C^2-regular and non-degenerate projectively Anosov flows on three dimensional manifolds. More precisely, we prove that such a flow on a connected manifold must be either an Anosov flow or represented as a…

Dynamical Systems · Mathematics 2011-09-12 Masayuki Asaoka

We construct non-algebraic Anosov flows in dimension $3+2n$, $n\geq 2$, by suspending the action of the fundamental group of a finite cover of the Bonatti-Langevin flow.

Dynamical Systems · Mathematics 2024-10-24 Danyu Zhang

In a previous paper with C. Bonatti ([5]), we have defined a general procedure to build new examples of Anosov flows in dimension 3. The procedure consists in gluing together some building blocks, called hyperbolic plugs, along their…

Dynamical Systems · Mathematics 2023-09-13 Francois Beguin , Bin Yu

We prove a classification theorem for transitive Anosov and pseudo-Anosov flows on closed 3-manifolds, up to orbit equivalence. In many cases, flows on a 3-manifold $M$ are completely determined by the set of free homotopy classes of their…

Dynamical Systems · Mathematics 2022-11-22 Thomas Barthelmé , Steven Frankel , Kathryn Mann

This paper is an exposition of the major results of P. Eberlein's paper, "When is a geodesic flow of Anosov type? I," in the special case when the manifold $M$ is a surface. We follow Eberlein's coverage closely, adding details when…

Dynamical Systems · Mathematics 2022-11-23 Hao-Tong Yan

We introduce a new object, the dynamical torsion, which extends the potentially ill-defined value at $0$ of the Ruelle zeta function of a contact Anosov flow twisted by an acyclic representation of the fundamental group. We show important…

Dynamical Systems · Mathematics 2024-10-16 Yann Chaubet , Nguyen Viet Dang

In this article we study topological transitivity of Anosov flows on non-compact 3-manifolds. We provide homological conditions under which the lifts of a transitive Anosov flow to certain infinite covers of the manifold remain transitive.…

Dynamical Systems · Mathematics 2025-10-09 Thomas Barthelmé , Lingfeng Lu

We prove a result allowing to build (transitive or non-transitive) Anosov flows on 3-manifolds by gluing together filtrating neighborhoods of hyperbolic sets. We give several applications; for example: 1. we build a 3-manifold supporting…

Dynamical Systems · Mathematics 2017-06-14 François Béguin , Bin Yu , Christian Bonatti

In this paper, we prove that manifolds of finite volume with Anosov geodesic flow have dense periodic orbits. The same result works for conservative Anosov flows in non-compact cases.

Dynamical Systems · Mathematics 2024-02-01 Nestor Nina Zarate , Sergio Romaña

Variational inequalities play in many applications an important role and are an active research area. Optimal a priori error estimates in the natural energy norm do exist but only very few results in other norms exist. Here we consider as…

Numerical Analysis · Mathematics 2015-07-28 Olaf Steinbach , Barbara Wohlmuth , Linus Wunderlich

We apply the matching functions technique in the setting of contact Anosov flows which satisfy a bunching assumption. This allows us to generalize the 3-dimensional rigidity result of Feldman-Ornstein~\cite{FO}. Namely, we show that if two…

Dynamical Systems · Mathematics 2023-08-30 Andrey Gogolev , Federico Rodriguez Hertz

We bring to light a new connection between dynamics and Heegaard Floer homology. On a closed 3-manifold $Y$ we consider a pseudo-Anosov flow $\phi$ with no perfect fits with respect to its singularity locus $L \subset Y$, or perhaps a…

Geometric Topology · Mathematics 2025-04-23 Antonio Alfieri , Chi Cheuk Tsang

Given a $\vartheta$-Anosov representation into a real reductive group $G$, we construct a natural resonance spectrum associated with the representation. This spectrum is a complex analytic variety of codimension $1$ in…

Representation Theory · Mathematics 2026-03-26 Yannick Guedes Bonthonneau , Thibault Lefeuvre , Tobias Weich

We consider two transitive $3$-dimensional Anosov flows which do not preserve volume and which are continuously conjugate to each other. Then, disregarding certain exceptional cases, such as flows with $C^1$ regular stable or unstable…

Dynamical Systems · Mathematics 2025-10-29 Andrey Gogolev , Martin Leguil , Federico Rodriguez Hertz