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We consider the dynamics of skew product maps associated with finitely generated semigroups of rational maps on the Riemann sphere. We show that under some conditions on the dynamics and the potential function \psi, there exists a unique…

Dynamical Systems · Mathematics 2009-06-26 Hiroki Sumi , Mariusz Urbanski

We show that given a closed $n$-manifold $M$, for a generic set of Riemannian metrics $g$ on $M$ there exists a sequence of closed geodesics that are equidistributed in $M$ if $n=2$; and an equidistributed sequence of embedded stationary…

Differential Geometry · Mathematics 2023-07-21 Xinze Li , Bruno Staffa

We consider a gradient flow associated to the mean field equation on $(M,g)$ a compact riemanniann surface without boundary. We prove that this flow exists for all time. Moreover, letting $G$ be a group of isometry acting on $(M,g)$, we…

Analysis of PDEs · Mathematics 2015-06-12 Jean-Baptiste Castéras

Let $S$ be a compact surface of genus $\geq 2$ equipped with a metric that is flat everywhere except at finitely many cone points with angles greater than $2\pi$. We examine the geodesic flow on $S$ and prove local product structure for a…

Dynamical Systems · Mathematics 2024-07-24 Benjamin Call , David Constantine , Alena Erchenko , Noelle Sawyer , Grace Work

We set out some general criteria to prove the K-property, refining the assumptions used in arXiv:1906.09315 for the flow case, and introducing the analogous discrete-time result. We also introduce one-sided $\lambda$-decompositions, as well…

Dynamical Systems · Mathematics 2020-07-02 Benjamin Call

The main result in this paper is the $C^{\infty}$ closing lemma for a large family of Hamiltonian flows on $4$-dimensional symplectic manifolds, which includes classical Hamiltonian systems. First we prove the $C^{\infty}$ closing lemma and…

Dynamical Systems · Mathematics 2019-04-23 Dong Chen

The harmonic map energy of a map from a closed, constant-curvature surface to a closed target manifold can be seen as a functional on the space of maps and domain metrics. We consider the gradient flow for this energy. In the absence of…

Differential Geometry · Mathematics 2019-09-17 James Kohout , Melanie Rupflin , Peter M. Topping

In this paper we utilize symmetries in order to exhibit exact solutions to Einstein's equation of a perfect fluid on a static manifold all of whose spatial factor belongs to the conformal class of a Riemannian space of constant curvature.

Differential Geometry · Mathematics 2019-05-02 Marcelo Barboza , Willian Tokura , Levi Adriano

We construct equivariant harmonic maps between cohomogeneity one manifolds.

Differential Geometry · Mathematics 2026-02-05 Anna Siffert

We show the smoothness of weakly Dirac-harmonic maps from a closed spin Riemann surface into stationary Lorentzian manifolds, and obtain a regularity theorem for a class of critical elliptic systems without anti-symmetry structures.

Analysis of PDEs · Mathematics 2020-03-31 Wanjun Ai , Miaomiao Zhu

In this paper, we systemally study the long time behavior of the curve shortening flow in a closed or non-compact complete locally Riemannian symmetric manifold. Assume that we have a global flow. Then we can exhibit a a limit for the…

Differential Geometry · Mathematics 2007-05-23 Li Ma , Dezhong Chen

We prove the existence of equilibrium states for geometric potentials in a class of piecewise weakly convex interval maps. This class includes systems with indifferent fixed points and non-Markov partitions. Under additional hypotheses we…

Dynamical Systems · Mathematics 2026-03-04 Nicolás Arévalo-Hurtado

Let $f:M\to N$ be a smooth area decreasing map between two Riemannian manifolds $(M,\gm)$ and $(N,\gn)$. Under weak and natural assumptions on the curvatures of $(M,\gm)$ and $(N,\gn)$, we prove that the mean curvature flow provides a…

Differential Geometry · Mathematics 2013-02-05 Andreas Savas-Halilaj , Knut Smoczyk

Given a closed Riemannian manifold, we prove the C0-general density theorem for continuous geodesic flows. More precisely, that there exists a residual (in the C0-sense) subset of the continuous geodesic flows such that, in that residual…

Dynamical Systems · Mathematics 2017-06-29 Mario Bessa , Maria Joana Torres

It is proved some results about existence and non existence of unit normal sections of submanifolds of the Euclidean space and sphere which associated Gauss maps are harmonic. Some applications to CMC hypersurfaces of the sphere and…

Differential Geometry · Mathematics 2021-08-18 Daniel Bustos , Jaime Ripoll

We give a formula for the topological pressure of the geodesic flow of a compact rank 1 manifold in terms of the growth of the number of closed hyperbolic (rank 1) geodesics. We derive an equidistribution result for these geodesics with…

Dynamical Systems · Mathematics 2013-06-04 Abdelhamid Amroun

In this article, we study Conformal pointwise-slant Riemannian maps (\textit{CPSRM}) from or to K\"{a}hler manifolds to or from Riemannian manifolds. To check the existence of such maps, we provide some non-trivial examples. We derive some…

Differential Geometry · Mathematics 2023-08-31 A. Zaidi , G. Shanker , J. Yadav

Let $(M,g)$ be a $C^\infty$-smooth, $n$-dimensional Riemannian manifold which is diffeomorphic to $\RR^n$ and admit an action of a properly discontinuous and cocompact group. This work proves the existence of a $C^\infty$ equivariant…

Differential Geometry · Mathematics 2025-11-25 Hongda Qiu

We prove that the graph of the logit equilibrium correspondence is a smooth manifold, which uniformly approximates the graph of the Nash equilibrium manifold.

Optimization and Control · Mathematics 2019-12-17 Eilon Solan , Omri N. Solan

We prove a $C^\infty$ closing lemma for Hamiltonian diffeomorphisms of closed surfaces. This is a consequence of a $C^\infty$ closing lemma for Reeb flows on closed contact three-manifolds, which was recently proved as an application of…

Symplectic Geometry · Mathematics 2016-09-15 Masayuki Asaoka , Kei Irie