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In this paper, we prove Ruelle's inequality for the geodesic flow in non-compact manifolds with Anosov geodesic flow and some assumptions on the curvature. In the same way, we obtain Pesin's formula for Anosov geodesic flow in non-compact…

Dynamical Systems · Mathematics 2024-09-06 Alexander Cantoral , Sergio Romaña

This paper concerns the Couette flow for 2-D compressible Navier-Stokes equations (N-S) in an infinitely long flat torus $\Torus\times\R$. Compared to the incompressible flow, the compressible Couette flow has a stronger lift-up effect and…

Analysis of PDEs · Mathematics 2024-09-11 Feimin Huang , Rui Li , Lingda Xu

We endow the set of persistence diagrams with the strong topology (the topology of countable direct limit of increasing sequence of bounded subsets considered in the bottleneck distance). The topology of the obtained space is described.…

General Topology · Mathematics 2020-05-22 Volodymyr Kiosak , Aleksandr Savchenko , Mykhailo Zarichnyi

We prove that every sectional-Anosov flow of a compact 3-manifold $M$ exhibits a finite collection of hyperbolic attractors and singularities whose basins form a dense subset of $M$. Applications to the dynamics of sectional-Anosov flows on…

Dynamical Systems · Mathematics 2013-06-14 S. Bautista , C. A. Morales

In this work we introduce and explore a rescaled-theory of local stable and unstable sets for rescaled-expansive flows and its applications to topological entropy. We introduce a rescaled version of the local unstable sets and the unstable…

Dynamical Systems · Mathematics 2025-08-22 Alexander Arbieto , Alfonso Artigue , Elias Rego

We give a new construction of the measure of maximal entropy for transitive Anosov flows through a method analogous to the construction of Patterson-Sullivan measures in negative curvature. In order to carry out our procedure we prove…

Dynamical Systems · Mathematics 2025-12-25 Clark Butler

This paper investigates the Cauchy problem for the compressible pressureless Navier-Stokes system in $\mathbb{R}^d$ with $d \geq 2$. Unlike the standard isentropic compressible Navier-Stokes system, the density in the pressureless model…

Analysis of PDEs · Mathematics 2025-11-05 Fucai Li , Jinkai Ni , Zhipeng Zhang

We find sufficient conditions for commutative non-autonomous systems on certain metric spaces to be topologically stable. In particular, we prove that (i) Every mean equicontinuous, mean expansive system with strong average shadowing…

Dynamical Systems · Mathematics 2019-06-25 Abdul Gaffar Khan , Pramod Kumar Das , Tarun Das

Consider the tangent bundle of a Riemannian manifold $(M,g)$ of dimension $n\geq3$ admitting a metric of negative curvature (not necessarily equal to $g$) endowed with a twisted symplectic structure defined by a closed 2-form on $M$. We…

Dynamical Systems · Mathematics 2011-08-16 Will J. Merry , Gabriel P. Paternain

We show the $H^1$ stability of shear flows of Prandtl type: $U^\nu = (U_s(y/\sqrt{\nu}),0)$, in the steady two-dimensional Navier-Stokes equations, under the natural assumptions that $U_s(Y) > 0$ for $Y > 0$, $U_s(0) = 0$, and $U_s'(0) >…

Analysis of PDEs · Mathematics 2019-05-01 David Gerard-Varet , Yasunori Maekawa

We show that for a $C^1$ residual subset of diffeomorphisms far away from homoclinic tangency, the stable manifolds of periodic points cover a dense subset of the ambient manifold. This gives a partial proof to a conjecture of C. Bonatti.

Dynamical Systems · Mathematics 2007-12-05 Jiagang Yang

We consider the so-called transport-Stokes system which describes sedimentation of inertialess suspensions in a viscous flow and couples a transport equation and the steady Stokes equations in the full three-dimensional space. First we…

Analysis of PDEs · Mathematics 2022-09-26 Amina Mecherbet , Franck Sueur

For $C^1$ diffeomorphisms, we prove that the Pesin's entropy formula holds for some invariant measure supported on any topological attractor that admits a dominated splitting without mixed behavior. We also prove Shub's entropy conjecture…

Dynamical Systems · Mathematics 2015-12-31 Dawei Yang , Yongluo Cao

This paper develops an entropy-based stability and robustness framework for nonlinear hypergraph dynamics with conservation and flow balance. We consider generator-form systems on the simplex whose state-dependent transition rates capture…

Systems and Control · Electrical Eng. & Systems 2026-04-14 Chencheng Zhang , Hao Yang , Bin Jiang , Shaoxuan Cui

We prove that the (necessarily existing) pseudo-physical or SRB-like measures of C1 expanding dynamical systems on a compact Riemannian manifold satisfy Pesin entropy formula. We include examples of C1 (non C1 plus Holder) expanding maps on…

Dynamical Systems · Mathematics 2026-04-21 Eleonora Catsigeras , Fernando Valenzuela Gómez

High order schemes are known to be unstable in the presence of shock discontinuities or under-resolved solution features for nonlinear conservation laws. Entropy stable schemes address this instability by ensuring that physically relevant…

Numerical Analysis · Mathematics 2024-01-12 Jesse Chan , Khemraj Shukla , Xinhui Wu , Ruofeng Liu , Prani Nalluri

In this work, we discuss the stability of Donaldson's flow of surfaces in a hyperk\"ahler 4-manifold. In \cite{WT2}, Wang and Tsai proved a uniqueness theorem and $C^1$ dynamic stability theorem of the mean curvature flow for minimal…

Differential Geometry · Mathematics 2026-01-07 Kuan-Hui Lee

A simple scheme for incompressible, constant density flows is presented, which avoids odd-even decoupling for the Laplacian on a collocated grids. Energy stability is implied by maintaining strict energy conservation. Momentum is conserved.…

Fluid Dynamics · Physics 2014-02-06 Julius Reiss

This paper is concerned with the incompressible limit of the compressible hydrodynamic flow of liquid crystals with periodic boundary conditions in R^N(N = 2, 3). It is rigorously shown that the local (and global) strong solution of the…

Analysis of PDEs · Mathematics 2014-05-06 Shijin Ding , Jinrui Huang , Huanyao Wen , Ruizhao Zi

In this paper, we give a complete topological and smooth classification of non-invertible Anosov maps on torus. We show that two non-invertible Anosov maps on torus are topologically conjugate if and only if their corresponding periodic…

Dynamical Systems · Mathematics 2026-01-14 Ruihao Gu , Yi Shi