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A conformal map from a Riemann surface to the Euclidean four-space is explained in terms of its twistor lift. A local factorization of a differential of a conformal map is obtained. As an application, the factorization of a differential…

Differential Geometry · Mathematics 2016-11-16 Kazuyuki Hasegawa , Katsuhiro Moriya

We consider non-bijective piecewise rotations of the plane. These maps belong to a family introduced in previous papers by Boshernitzan and Goetz. We derive in this paper some upper bounds to the size of the limit set. This improves results…

Dynamical Systems · Mathematics 2024-10-03 Nicolas Bédaride , Jean françois Bertazzon , Idrissa Kaboré

This survey article concerns inducing schemes in the context of interval maps. We explain how the study of these induced systems allows for the fine description of, not only, the thermodynamic formalism for certain multimodal maps, but also…

Dynamical Systems · Mathematics 2013-09-27 Godofredo Iommi , Mike Todd

The main result of this paper is a proof using real analysis of the monotonicity of the topological entropy for the family of quadratic maps, sometimes called Milnor's Monotonicity Conjecture. In contrast, the existing proofs rely in one…

Dynamical Systems · Mathematics 2020-10-13 José M. Amigó , Angel Giménez

Given a point and an expanding map on the unit interval, we consider the set of points for which the forward orbit under this map is bounded away from the given point. For maps like multiplication by an integer modulo 1, such sets have full…

Dynamical Systems · Mathematics 2009-04-29 David Färm

Let $0<\lambda<1$. We consider the one-parameter family of circle $\lambda$-affine contractions $f_\delta:x \in [0,1) \mapsto \lambda x + \delta \; {\rm mod}\,1 $, where $0 \le \delta <1$. Let $\rho$ be the rotation number of the map…

Dynamical Systems · Mathematics 2018-03-20 Michel Laurent , Arnaldo Nogueira

The twist interval of a twist map on the annulus $A=\mathbb{T}\times [0,1]$ has nonempty interior if $f$ preserves the area, but could be degenerate for general twist maps. In this note, we show that if a twist map $f$ is non-wandering,…

Dynamical Systems · Mathematics 2018-05-29 Pengfei Zhang

In this dissertation, we explore the structure of inversion graphs of permutations--a class of graphs that naturally arises by representing each permutation as a graph, where vertices correspond to entries and edges encode inversions.…

Combinatorics · Mathematics 2025-06-30 Sean Mandrick

Topological conjugateness of one dimensional unimodal dynamical systems, which are generated by interval [0, 1] into itself maps are studied. We study the smoothness and differentiability of the conjugacy of symmetrical and non-symmetrical…

Dynamical Systems · Mathematics 2016-03-23 Makar Plakhotnyk

We introduce a tree structure for the iterates of symmetric bimodal maps and identify a subset which we prove to be isomorphic to the family of unimodal maps. This subset is used as a second factor for a $\ast $-product that we define in…

Dynamical Systems · Mathematics 2007-05-23 J. P. Lampreia , R. Severino , J. Sousa Ramos

Let $f$ be a piecewise continuous and monotonic map on the interval with at most finitely many discontinuities and turning points. In this paper we study properties about this class of maps and show its main difference from the continuous…

Dynamical Systems · Mathematics 2026-04-07 Kleyber Cunha , Marcio Gouveia , Paulo Santana

This note presents an approach to studying the iterates of a mapping whose restriction to the complement of a finite set is continuous and open. The main examples to which the approach can be applied are piecewise monotone mappings defined…

Dynamical Systems · Mathematics 2010-11-23 Chris Preston

This article represents our attempt to improve the previous results on defining and understanding overconvergent Eichler-Shimura maps for overconvergent modular symbols (in the elliptic case).

Number Theory · Mathematics 2020-06-04 Fabrizio Andreatta , Adrian Iovita

This paper is a study of the dynamics of a new family of maps from the complex plane to itself, which we call twisted tent maps. A twisted tent map is a complex generalization of a real tent map. The action of this map can be visualized as…

Dynamical Systems · Mathematics 2012-04-30 Stephen Joseph Chamblee

We present lower and upper bounds for the geometric-arithmetic index of unicyclic graphs and provide extremal graphs for the corresponding bounds.

Combinatorics · Mathematics 2023-01-20 Sunyo Moon , Seungkook Park

We investigate the break up of the last invariant curve for families of standard maps. Our main result is another evidence of how hard this problem is. We give an example of an analytic mapping with a "pathological" behavior, related to the…

Dynamical Systems · Mathematics 2007-05-23 S Addas-Zanata

Examples are given of tent maps $T$ for which there exist non-trivial sets $B \subset [0,1]$ such that $T:B \to B$ is a homeomorphism.

Dynamical Systems · Mathematics 2007-05-23 Henk Bruin

We improve previous results by exhibiting a construction that contains all known examples. A suficient condition for the existence of robustly transitive maps displaying singularities on a certain large class of compact manifolds is given.

Dynamical Systems · Mathematics 2021-05-10 Juan Carlos Morelli

We introduce orbital graphs and discuss some of their basic properties. Then we focus on their usefulness for search algorithms for permutation groups, including finding the intersection of groups and the stabilizer of sets in a group.

Group Theory · Mathematics 2017-05-24 Paula Hähndel , Christopher Jefferson , Markus Pfeiffer , Rebecca Waldecker

We study maps of the unit interval whose graph is made up of two increasing segments and which are injective in an extended sense. Such maps $f_{\p}$ are parametrized by a quintuple $\p$ of real numbers satisfying inequations. Viewing…

Dynamical Systems · Mathematics 2022-12-22 José Pedro Gaivao , Michel Laurent , Arnaldo Nogueira