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We find conditions for stationary measures of random dynamical systems on surfaces having dissipative diffeomorphisms to be absolutely continuous. These conditions involve a uniformly expanding on average property in the future (UEF) and…

Dynamical Systems · Mathematics 2025-10-31 Aaron Brown , Homin Lee , Davi Obata , Yuping Ruan

We prove a topological rigidity theorem for closed hypersurfaces of the Euclidean sphere and of an elliptic space form. It asserts that, under a lower bound hypothesis on the absolute value of the principal curvatures, the hypersurface is…

Differential Geometry · Mathematics 2018-09-28 Eduardo Longa , Jaime Ripoll

We consider an area-preserving diffeomorphism of a compact surface, which is assumed to be an irrational rotation near each boundary component. A finite set of periodic orbits of the diffeomorphism gives rise to a braid in the mapping…

Dynamical Systems · Mathematics 2025-06-03 Michael Hutchings

We combine Homotopy Type Theory with axiomatic cohesion, expressing the latter internally with a version of "adjoint logic" in which the discretization and codiscretization modalities are characterized using a judgmental formalism of "crisp…

Category Theory · Mathematics 2017-04-26 Michael Shulman

In this paper, we construct cw-expansive homeomorphisms on compact surfaces of genus greater than or equal to zero with a fixed point whose local stable set is connected but not locally connected. This provides an affirmative answer to…

Dynamical Systems · Mathematics 2026-01-01 Alberto Sarmiento , Douglas Danton , Viviane Pardini Valério

In this paper we prove that in any analytic one-parameter family of twist maps of the annulus, homotopically invariant curves filled with periodic points corresponding to a given rotation number, either exist for all values of the…

Dynamical Systems · Mathematics 2024-07-25 Corentin Fierobe , Alfonso Sorrentino

For a smooth finite cyclic covering over a projective space of dimension greater than one, we show that the group of automorphisms acts faithfully on the cohomology except for a few cases. In characteristic zero, we study the equivariant…

Algebraic Geometry · Mathematics 2021-12-02 Renjie Lyu , Xuanyu Pan

We prove that a (branched) minimal immersion from $\mathbb{C}$ to $\mathbb{R}^n$ is stable if and only if it lives in an even dimensional affine subspace and is holomorphic for some orthogonal complex structure on the subspace. More…

Differential Geometry · Mathematics 2026-05-07 Nathaniel Sagman , Thomas-René Thalmaier

One generally expects that the techniques of arboreal singularities and gluing of local differential graded categories will result in a useful global invariant for all Weinstein manifolds. In this paper we construct explicit models for the…

Symplectic Geometry · Mathematics 2025-11-18 Shanon J. Rubin

The bounded orbit conjecture says that every homeomorphism on the plane with each of its orbits being bounded must have a fixed point. Brouwer's translation theorem asserts that the conjecture is true for orientation preserving…

Dynamical Systems · Mathematics 2025-04-11 Jiehua Mai , Enhui Shi , Kesong Yan , Fanping Zeng

We classify isotopy classes of automorphisms (self-homeomorphisms) of 3-manifolds satisfying the Thurston Geometrization Conjecture. The classification is similar to the classification of automorphisms of surfaces developed by Nielsen and…

Geometric Topology · Mathematics 2007-05-23 Leonardo N. Carvalho , Ulrich Oertel

A deep analysis of the Lyapunov exponents, for stationary sequence of matrices going back to Furstenberg, for more general linear cocycles by Ledrappier and generalized to the context of non-linear cocycles by Avila and Viana, gives an…

Dynamical Systems · Mathematics 2017-05-16 Ali Tahzibi , Jiagang Yang

Let $A$ be an annulus in the plane $\mathbb R^2$ and $g:A\rightarrow A$ be a boundary components preserving homeomorphism which is distal and has no periodic points. Then there is a continuous decomposition of $A$ into $g$-invariant circles…

Dynamical Systems · Mathematics 2024-06-18 Enhui Shi , Hui Xu , Ziqi YU

An approach to find a weak form of shadowing is developed. We consider homeomorphisms of a compact metric space. It is proved that every pseudotrajectory with sufficiently small errors contains at least one subsequence that can be shadowed…

Dynamical Systems · Mathematics 2016-07-12 Danila Cherkashin , Sergey Kryzhevich

In this paper, we show the uniqueness of equilibrium state for a family of partially hyperbolic horseshoes, introduced in [12] for some classes of continuous potentials. For the first class, the method used here is making use of the Sarig's…

Dynamical Systems · Mathematics 2025-04-16 Krerley Oliveira , Marlon Oliveira , Eduardo Santana

We prove that the groups of orientation-preserving homeomorphisms and diffeomorphisms of $\mathbb{R}^n$ are boundedly acyclic, in all regularities. This is the first full computation of the bounded cohomology of a transformation group that…

Geometric Topology · Mathematics 2024-09-27 Francesco Fournier-Facio , Nicolas Monod , Sam Nariman , Alexander Kupers

Poincare's classification of the dynamics of homeomorphisms of the circle is one of the earliest, but still one of the most elegant, classification results in dynamical systems. Here we generalize this to quasiperiodically forced circle…

Dynamical Systems · Mathematics 2007-05-23 Tobias H. Jaeger , Jaroslav Stark

Consider a homeomorphism h of the closed annulus S^1*[0,1], isotopic to the identity, such that the rotation set of h is reduced to a single irrational number alpha (we say that h is an irrational pseudo-rotation). For every positive…

Dynamical Systems · Mathematics 2007-05-23 Sylvain Crovisier , Francois Beguin , Frederic Le Roux , Alice Patou

In this work we exploit the notion of N-distal property for a homeomorphisms. We study how it behaves under factor operations. We investigate the relation between N-distality and transitivity, N-equicontinuity and expansivity. We also prove…

Dynamical Systems · Mathematics 2023-11-06 E. Rego , J. C. Salcedo

Let S be a compact connected surface and let f be an element of the group Homeo\_0(S) of homeomorphisms of S isotopic to the identity. Denote by \tilde{f} a lift of f to the universal cover of S. Fix a fundamental domain D of this universal…

Dynamical Systems · Mathematics 2017-10-11 Emmanuel Militon