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A sufficient geometrical condition for the existence of absolutely continuous invariant probability measures for S-unimodal maps will be discussed. The Lebesgue typical existence of such measures in the quadratic family will be a…

Dynamical Systems · Mathematics 2008-02-03 Marco Martens , Tomasz Nowicki

In this paper, we introduce a commutative mappings satisfying the class of generalized non-expansive mappings which is wider than the class of mappings satisfying the condition (C), so called Condition B gamma, mu. The results obtained in…

Functional Analysis · Mathematics 2022-07-11 Gezahegn Anberber Tadesse

We show that every uniformly asymptotically affine circle endomorphism has a uniformly asymptotically conformal extension.

Complex Variables · Mathematics 2020-06-02 Frederick P. Gardiner , Yunping Jiang

For a smooth expanding map $f$ of the circle, its (unmarked) length spectrum is defined as the set of logarithms of multipliers of periodic orbits of $f$. This spectrum is analogous to the set of lengths of all closed geodesics on…

Dynamical Systems · Mathematics 2025-11-24 Kostiantyn Drach , Vadim Kaloshin

We study the properties of `infinite-volume mixing' for two classes of intermittent maps: expanding maps $[0,1] \longrightarrow [0,1]$ with an indifferent fixed point at 0 preserving an infinite, absolutely continuous measure, and expanding…

Dynamical Systems · Mathematics 2018-11-14 Claudio Bonanno , Paolo Giulietti , Marco Lenci

We classify generalized distance-squared mappings of $\mathbb{R}^{n+1}$ into $\mathbb{R}^{2n+1}$ ($n\ge 1$) having generic central points. Moreover, we show that there does not exist a universal bad set $\Sigma\subset…

Differential Geometry · Mathematics 2015-03-10 S. Ichiki , T. Nishimura

We prove that the homeomorphisms of a compact manifold with dimension one have zero topological emergence, whereas in dimension greater than one the topological emergence of a C^0-generic conservative homeomorphism is maximal, equal to the…

Dynamical Systems · Mathematics 2025-01-08 Maria Carvalho , Fagner B. Rodrigues , Paulo Varandas

We introduce a family of maps generating continued fractions where the digit $1$ in the numerator is replaced cyclically by some given non-negative integers $(N_1,\ldots,N_m)$. We prove the convergence of the given algorithm, and study the…

Dynamical Systems · Mathematics 2021-12-09 Karma Dajani , Niels Langeveld

We prove that a $C^3$ critical circle map without periodic points has zero Lyapunov exponent with respect to its unique invariant Borel probability measure. Moreover, no critical point of such a map satisfy the Collet-Eckmann condition.…

Dynamical Systems · Mathematics 2020-03-18 Edson de Faria , Pablo Guarino

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

We show that for a large class of maps on manifolds of arbitrary finite dimension, the existence of a Gibbs-Markov-Young structure (with Lebesgue as the reference measure) is a necessary as well as sufficient condition for the existence of…

Dynamical Systems · Mathematics 2012-11-07 Jose F. Alves , Carla L. Dias , Stefano Luzzatto

We prove that the category of c-spaces with continuous maps is not cartesian closed. As a corollary the category of locally finitary compact spaces with continuous maps is also not cartesian closed.

Logic in Computer Science · Computer Science 2023-06-22 Z. Lyu , X. Xie , H. Kou

We extend the concept of expansive measure \cite{am} defined for homeomorphism to flows. We obtain some properties for such measures including abscense of singularities in the support, aperiodicity, expansivity with respect to time-$T$…

Dynamical Systems · Mathematics 2013-04-12 D. Carrasco-Olivera , C. A. Morales

In this paper we investigate the existence of generically finite dominant rational maps from products of curves to surfaces of general type. We prove that the product CxD of two distinct very general curves of genus g>6 and g'>1 does not…

Algebraic Geometry · Mathematics 2014-10-03 Francesco Bastianelli , Gian Pietro Pirola

Let M be a possibly noncompact manifold. We prove, generically in the C^k-topology (k=2,...,\infty), that semi-Riemannian metrics of a given index on M do not possess any degenerate geodesics satisfying suitable boundary conditions. This…

Differential Geometry · Mathematics 2011-07-28 Renato G. Bettiol , Roberto Giambò

We investigate the "natural" locus of definition of Abel-Jacobi maps. In particular, we show that, for a proper, geometrically reduced curve C -- not necessarily smooth -- the Abel-Jacobi map from the smooth locus C^{sm} into the Jacobian…

Algebraic Geometry · Mathematics 2025-02-18 Zev Rosengarten

Let $\Sigma$ denote a closed surface with constant mean curvature in $\mathbb{G}^3$, a 3-dimensional Lie group equipped with a bi-invariant metric. For such surfaces, there is a harmonic Gauss map which maps values to the unit sphere within…

Differential Geometry · Mathematics 2026-01-22 Alcides de Carvalho , Marcos P. Cavalcante , Wagner Costa-Filho , Darlan de Oliveira

In this paper we develop a tool to identify functions which have no iterative roots of any order. Using this, we prove that when $X$ is $[0,1]^m$, $\mathbb{R}^m$ or $S^1$, every non-empty open set of the space $\mathcal{C}(X)$ of continuous…

Dynamical Systems · Mathematics 2022-08-09 B. V. Rajarama Bhat , Chaitanya Gopalakrishna

Let $\Lambda$ be an isolated non-trival transitive set of a $C^1$ generic diffeomorphism $f\in\Diff(M)$. We show that the space of invariant measures supported on $\Lambda$ coincides with the space of accumulation measures of time averages…

Dynamical Systems · Mathematics 2012-03-15 Wenxiang Sun , Xueting Tian

It is shown that the free multiplicative convolution of two nondegenerate probability measures on the unit circle has no continuous singular part relative to arclength measure. Analogous results have long been known for free additive…

Operator Algebras · Mathematics 2023-05-24 Serban T. Belinschi , Hari Bercovici , Ching-Wei Ho