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An area-preserving homeomorphism isotopic to the identity is said to have rational rotation direction if its rotation vector is a real multiple of a rational class. We give a short proof that any area-preserving homeomorphism of a compact…

Dynamical Systems · Mathematics 2025-08-13 Rohil Prasad

Let $f:{\rm T^2\rightarrow T^2}$ be a homeomorphism homotopic to the identity, $\widetilde{f}:{\rm I}\negthinspace {\rm R^2\rightarrow I} \negthinspace {\rm R^2}$ be a fixed lift and $\rho (\widetilde{f})$ be its rotation set, which we…

Dynamical Systems · Mathematics 2016-10-21 Patrice Le Calvez , Salvador Addas-Zanata

We provide a classification of minimal sets of homeomorphisms of the two-torus, in terms of the structure of their complement. We show that this structure is exactly one of the following types: (1) a disjoint union of topological disks, or…

Dynamical Systems · Mathematics 2014-05-06 Tobias Jaeger , Ferry Kwakkel , Alejandro Passeggi

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

Let $f$ be a transitive homeomorphism of the two-dimensional torus in the homotopy class of the identity. We show that a lift of $f$ to the universal covering is transitive if and only if the rotation set of the lift contains the origin in…

Dynamical Systems · Mathematics 2021-02-22 Nancy Guelman , Andres Koropecki , Fabio Armando Tal

We study homotopic-to-the-identity torus homeomorphisms, whose rotation set has nonempty interior. We prove that any such map is monotonically semiconjugate to a homeomorphism that preserves the Lebesgue measure, and that has the same…

Dynamical Systems · Mathematics 2024-12-31 Alejo García-Sassi , Fábio Armando Tal

The main theme of the paper is the dynamics of Hamiltonian diffeomorphisms of ${\mathbb C}{\mathbb P}^n$ with the minimal possible number of periodic points (equal to $n+1$ by Arnold's conjecture), called here Hamiltonian pseudo-rotations.…

Symplectic Geometry · Mathematics 2018-10-04 Viktor L. Ginzburg , Basak Z. Gurel

We extend Poincar\'e's theory of orientation-preserving homeomorphisms from the circle to circloids with decomposable boundary. As special cases, this includes both decomposable cofrontiers and decomposable cobasin boundaries. More…

Dynamical Systems · Mathematics 2016-11-21 Tobias Jäger , Andres Koropecki

In the context of the Franks-Misiurewicz Conjecture, we study homeomorphisms of the two-torus semiconjugate to an irrational rotation of the circle. As a special case, this conjecture asserts uniqueness of the rotation vector in this class…

Dynamical Systems · Mathematics 2013-05-08 Tobias Jäger , Alejandro Passeggi

This paper studies homeomorphisms of the closed annulus that are isotopic to the identity from the viewpoint of rotation theory, using a newly developed forcing theory for surface homeomorphisms. Our first result is a solution to the so…

Dynamical Systems · Mathematics 2019-09-24 Jonathan Conejeros , Fabio Armando Tal

This article deals with nonwandering (e.g. area-preserving) homeomorphisms of the torus $\mathbb{T}^2$ which are homotopic to the identity and strictly toral, in the sense that they exhibit dynamical properties that are not present in…

Dynamical Systems · Mathematics 2021-02-22 Andres Koropecki , Fabio Armando Tal

We construct a $C^\infty$ area-preserving diffeomorphism of the two-dimensional torus which is Bernoulli (in particular, ergodic) with respect to Lebesgue measure, homotopic to the identity, and has a lift to the universal covering whose…

Dynamical Systems · Mathematics 2021-02-22 Andres Koropecki , Fabio Armando Tal

Motivated by the question whether a round disk can be realized as the rotation set of a torus diffeomorphism, we study the roundness of rotation sets of a parametric family of torus diffeomorphisms $F_\rho$, where the parameter $\rho$…

Dynamical Systems · Mathematics 2025-10-10 Boris Perrot , Jan Boroński , Alex Clark

We prove that any minimal $2$-torus homeomorphism which is isotopic to the identity and whose rotation set is not just a point exhibits uniformly bounded rotational deviations on the perpendicular direction to the rotation set. As a…

Dynamical Systems · Mathematics 2020-02-11 Alejandro Kocsard

We consider the rotation set $\rho(F)$ for a lift $F$ of an area preserving homeomorphism $f: \t^2\to \t^2$, which is homotopic to the identity. The relationship between this set and the existence of periodic points for $f$ is least well…

Dynamical Systems · Mathematics 2016-09-06 John Franks

In this paper we consider $C^{1+\epsilon}$ area-preserving diffeomorphisms of the torus $f,$ either homotopic to the identity or to Dehn twists. We suppose that $f$ has a lift $\widetilde{f}$ to the plane such that its rotation set has…

Dynamical Systems · Mathematics 2014-04-22 Salvador Addas-Zanata

In this paper, we study pseudo-rotations of the open annulus, \emph{i.e.} conservative homeomorphisms of the open annulus whose rotation set is reduced to a single irrational number (the angle of the pseudo-rotation). We prove in particular…

Dynamical Systems · Mathematics 2007-05-23 F. Béguin , S. Crovisier , F. Le Roux

We prove that, if $f$ is a homeomorphism of the two torus isotopic to the identity whose rotation set is a non-degenerate segment and $f$ has a periodic point, then it has uniformly bounded deviations in the direction perpendicular to the…

Dynamical Systems · Mathematics 2020-03-31 Guilherme Silva Salomão , Fabio Armando Tal

This paper studies homeomorphisms of surfaces isotopic to the identity by means of purely topological methods and Brouwer theory. The main development is a novel theory of orbit forcing using maximal isotopies and transverse foliations.…

Dynamical Systems · Mathematics 2017-11-09 Patrice Le Calvez , Fabio Armando Tal

We study the rotation sets for homeomorphisms homotopic to the identity on the torus $\mathbb T^d$, $d\ge 2$. In the conservative setting, we prove that there exists a Baire residual subset of the set $\text{Homeo}_{0, \lambda}(\mathbb…

Dynamical Systems · Mathematics 2019-09-10 H. Lima , P. Varandas