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We define $\partial$-biLipschitz homeomorphisms between uniform metric spaces and show that these maps are always quasim\"obius. We also show that a homeomorphism being $\partial$-biLipschitz is equivalent to the map biLipschitz in the…

Metric Geometry · Mathematics 2021-01-06 Clark Butler

We determine the exact complexity of classifying compact metric spaces up to homeomorphism. More precisely, the homeomorphism relation on compact metric spaces is Borel bi-reducible with the complete orbit equivalence relation of Polish…

Logic · Mathematics 2014-09-22 Joseph Zielinski

We extend the concept of two-scale convergence on forms in Orlicz-Sobolev's spaces and we describe the homogenization for a family of integral functionals with convex and nonstandard growth integrands defined on the tangent bundle of a…

Analysis of PDEs · Mathematics 2023-12-27 Franck Arnold Tchinda , Joel Fotso Tachago , Joseph Dongho

We show that integration with respect to the Euler-Poincar\'e characteristic can be extended from the setting of definable sets to the setting of topological spaces homeomorphic to definable sets. We use that extension to generalize a…

Algebraic Topology · Mathematics 2018-07-05 E. Macías-Virgós , D. Mosquera-Lois

We provide a classification of random orientation-preserving homeomorphisms of $\mathbb{S}^1$, up to topological conjugacy of the random dynamical systems generated by i.i.d. iterates of the random homeomorphism. This classification covers…

Dynamical Systems · Mathematics 2017-07-19 Thai Son Doan , Jeroen S. W. Lamb , Julian Newman , Martin Rasmussen

In this article, we will define the Orlicz space and the Orlicz-Sobolev space, and develop their topological properties. We will also examine their applications to partial differential equations (PDEs), with an emphasis on the use of…

Functional Analysis · Mathematics 2023-06-26 Sabri Bahrouni , Hichem Ounaies

We prove some extension theorems involving uniformly continuous maps of the universal Urysohn space. We also prove reconstruction theorems for certain groups of autohomeomorphisms of this space and of its open subsets.

Metric Geometry · Mathematics 2012-10-23 Wieslaw Kubiś , Matatyahu Rubin

We study expansive dynamical systems from the viewpoint of general topology. We introduce the notions of orbit and refinement expansivity on topological spaces extending expansivity in the compact metric setting. Examples are given on…

General Topology · Mathematics 2015-09-17 Mauricio Achigar , Alfonso Artigue , Ignacio Monteverde

In this article, the authors establish a new characterization of the Musielak--Orlicz--Sobolev space on $\mathbb{R}^n$, which includes the classical Orlicz--Sobolev space, the weighted Sobolev space and the variable exponent Sobolev space…

Classical Analysis and ODEs · Mathematics 2018-10-08 Sibei Yang , Dachun Yang , Wen Yuan

We study the homeomorphic extension of biholomorphisms between convex domains in $\mathbb C^d$ without boundary regularity and boundedness assumptions. Our approach relies on methods from coarse geometry, namely the correspondence between…

Complex Variables · Mathematics 2019-11-26 Filippo Bracci , Hervé Gaussier , Andrew Zimmer

The optimal Orlicz target space is exhibited for embeddings of fractional-order Orlicz-Sobolev spaces in $\mathbb R^n$. An improved embedding with an Orlicz-Lorentz target space, which is optimal in the broader class of all…

Functional Analysis · Mathematics 2020-01-17 Angela Alberico , Andrea Cianchi , Luboš Pick , Lenka Slavíková

Some generalizations of the classical Hurewicz formula are obtained for extension dimension and C-spaces.

Algebraic Topology · Mathematics 2007-05-23 Alex Chigogidze , Vesko Valov

Let $\mathbb X$ and $\mathbb Y$ be $\ell$-connected Jordan domains, $\ell \in \mathbb N$, with rectifiable boundaries in the complex plane. We prove that any boundary homeomorphism $\varphi \colon \partial \mathbb X \to \partial \mathbb Y$…

Complex Variables · Mathematics 2018-12-06 Aleksis Koski , Jani Onninen

Very recently, it was proved that if the hyperbolic metric of a planar Jordan domain is $L^q$-integrable for some $q\in (1,\infty)$, then every homeomorphic parametrization of the boundary Jordan curve via the unit circle can be extended to…

Complex Variables · Mathematics 2025-06-13 Xilin Zhou

We have proved that homeomorphisms of domains of Euclidean space, inverse of which distort the modulus of families of curves by Poletskii type, have a continuous extension to isolated boundary point.

Metric Geometry · Mathematics 2018-08-02 E. A. Sevost'yanov

In this paper we define bicomplex Orlicz space with hyperbolic valued Luxemburg norm and discussed some of their properties. We have also partially characterize an integral representation of a $\mathbb{D}$-valued convex function. Further we…

Functional Analysis · Mathematics 2017-01-04 R. Kumar , K. Sharma , R. Tundup , S. Wazir

It is given a canonical representation of prime ends in regular spatial domains and, on this basis, it is studied the boundary behavior of the so-called lower Q-homeomorphisms that are the natural generalization of the quasiconformal…

Complex Variables · Mathematics 2015-02-13 Denis Kovtonyuk , Vladimir Ryazanov

In this paper we consider expansive homeomorphisms of compact spaces with a hyperbolic metric presenting a self-similar behavior on stable and unstable sets. Several application are given related to Hausdorff dimension, entropy,…

Dynamical Systems · Mathematics 2018-01-29 Alfonso Artigue

We show that the topology of uniform convergence on bounded sets is compatible with the group law of the automorphism group of a large class of spaces that are endowed with both a uniform structure and a bornology, thus yielding numerous…

Group Theory · Mathematics 2020-01-03 Maxime Gheysens

We study the topology of metric spaces which are definable in o-minimal expansions of ordered fields. We show that a definable metric space either contains an infinite definable discrete set or is definably homeomorphic to a definable set…

Logic · Mathematics 2015-11-12 Erik Walsberg