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We find universal spaces for Alexandroff and finite spaces and explore some of its topological properties as well as their description as inverse limits of finite spaces and Alexandroff extensions. They can be used as a natural environment…

General Topology · Mathematics 2024-12-02 Diego Mondéjar

In this paper, we introduce the tensor analogues of commuting automorphisms and central automorphisms. Then we give several properties of such automorphisms and apply these new concepts to give some interesting results for $2_\otimes$-Engel…

Group Theory · Mathematics 2020-01-01 Fahimeh Mohammadzadeh , Hanieh Golmakani , Azam Hokmabadi , Elaheh Mohammadzadeh

Here we look at (collections of) semimetrics and seminorms, including their ultrametric versions. In particular, we are concerned with geometric properties related to connectedness and topological dimension 0.

Classical Analysis and ODEs · Mathematics 2015-06-25 Stephen Semmes

We establish connections between several properties of topological dynamical systems, such as: - every point is generic for an ergodic measure, - the map sending points to the measures they generate is continuous, - the system splits into…

Dynamical Systems · Mathematics 2021-01-14 Tomasz Downarowicz , Benjamin Weiss

This lecture is devoted to review some of the main properties of multisymplectic geometry. In particular, after reminding the standard definition of multisymplectic manifold, we introduce its characteristic submanifolds, the canonical…

Mathematical Physics · Physics 2019-12-02 Narciso Román-Roy

The class of generic structures among those consisting of the measure algebra of a probability space equipped with an automorphism is axiomatizable by positive sentences interpreted using an approximate semantics. The separable generic…

Logic · Mathematics 2007-05-23 Alexander Berenstein , C. Ward Henson

For a given ergodic measure preserving transformation T of a standard measure space each finite labelled partition defines an ergodic stationary process. There is a complete metric on the space of partitions which is separable. Various…

Dynamical Systems · Mathematics 2025-07-30 Benjamin Weiss

We continue our study of the dynamics of mappings with small topological degree on (projective) complex surfaces. Previously, under mild hypotheses, we have constructed an ergodic ``equilibrium'' measure for each such mapping. Here we study…

Dynamical Systems · Mathematics 2009-09-10 Jeffrey Diller , Romain Dujardin , Vincent Guedj

Automorphisms of handlebodies arise naturally in the a classification of automorphisms of three-manifolds. Among automorphisms of handlebodies, there are certain automorphisms called irreducible (or generic), which are analogues of…

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

We classify invariant probability measures for non-elementary groups of automorphisms, on any compact K\"ahler surface X, under the assumption that the group contains a so-called "parabolic automorphism". We also prove that except in…

Dynamical Systems · Mathematics 2022-02-10 Serge Cantat , Romain Dujardin

The special linear groups, the mapping class groups of surfaces, the outer autormorphism groups of free groups appear in numerous domains. Their analogies, developped in particular in K. Vogtmann's work, have been written about a lot. In…

Group Theory · Mathematics 2011-10-04 Frédéric Paulin

In this paper, we study group equations with occurrences of automorphisms. We describe equational domains in this class of equations. Moreover, we solve a number of open problem posed in universal algebraic geometry.

Algebraic Geometry · Mathematics 2020-03-26 Artem N. Shevlyakov

Here we look at some geometric properties related to connectedness and topological dimension 0, especially in connection with norms on vector spaces over fields with absolute value functions, which may be non-archimedian.

Classical Analysis and ODEs · Mathematics 2015-03-10 Stephen Semmes

We study the space of ergodic measures of the map $$f:\mathbb{T}^2\to \mathbb{T}^2, \ f(x, y)=(x, \ x+y)(\text{mod}\, 1),$$ and show that its structure is similar to the graph of Thomae's function.

Dynamical Systems · Mathematics 2022-06-29 Anton Gorodetski , Alexandro Luna

We classify complex projective surfaces with an automorphism of positive entropy for which the unique invariant measure of maximal entropy is absolutely continuous with respect to Lebesgue measure.

Dynamical Systems · Mathematics 2014-10-07 Serge Cantat , Christophe Dupont

We prove the hyperbolicity of ergodic maximal entropy measures for a class of partially hyperbolic diffeomorphisms of $\mathbb{T}^{d}$, which have a compact two-dimensional center foliation.

Dynamical Systems · Mathematics 2023-06-21 Carlos F. Álvarez

A number of topics involving metrics and measures are discussed, including some of the special structure associated with ultrametrics.

Classical Analysis and ODEs · Mathematics 2013-06-12 Stephen Semmes

Invariant ergodic measures for generalized Boole type transformations are studied using an invariant quasi-measure generating function approach based on special solutions to the Frobenius--Perron operator. New two-dimensional Boole type…

Dynamical Systems · Mathematics 2020-06-11 Denis Blackmore , Jolanta Golenia , Yarema A. Prykarpatsky , Anatoliy K. Prykarpatsky

In the paper we give an introduction to Anosov diffeomorphisms, ways to represent their chaotic properties and some historical remarks on this subject. A complete classification of hyperbolic linear automorphisms of 2-torus is presented. We…

Dynamical Systems · Mathematics 2008-10-30 Dmitry V. Anosov , Alexey V. Klimenko , Grisha Kolutsky

We study ergodic properties of a family of traffic maps acting in the space of bi-infinite sequences of real numbers. The corresponding dynamics mimics the motion of vehicles in a simple traffic flow, which explains the name. Using…

Dynamical Systems · Mathematics 2015-06-11 Michael Blank