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The present paper is devoted to the study of classes of mappings with non--bounded characteristics of quasiconformality. It is proved that the normal families of mappings distorting the families of mappings in ${\Bbb R}^n$ by special way,…

Complex Variables · Mathematics 2013-09-04 Evgeny Sevost'yanov

In this short note, we consider quasiregular local homeomorphisms on uniform domains. We prove that such mappings always can be extended to some boundary points along John curves, which extends the corresponding result of Rajala [Amer. J.…

Complex Variables · Mathematics 2024-10-15 Chang-Yu Guo , Yi Xuan

A digraph is semicomplete if any two vertices are connected by at least one arc and is locally semicomplete if the out-neighbourhood and the in-neighbourhood of any vertex induce a semicomplete digraph. In this paper we study various…

Combinatorics · Mathematics 2022-12-07 Pierre Aboulker , Guillaume Aubian , Pierre Charbit

The conformal deformations are contained in two classes of mappings: quasiconformal and harmonic mappings. In this paper we consider the intersection of these classes. We show that, every $K$ quasiconformal harmonic mapping between…

Analysis of PDEs · Mathematics 2011-03-09 David Kalaj

In this article, we prove the existence of common fixed points for a pair of maps on a $q$-spherically complete $T_0$-ultra-quasi-metric space. The present article is a generalization, in the assymmetric setting of the paper of Rao et…

General Topology · Mathematics 2014-12-04 Collins Amburo Agyingi , Yaé Ulrich Gaba

We establish a uniformization result for metric surfaces - metric spaces that are topological surfaces with locally finite Hausdorff 2-measure. Using the geometric definition of quasiconformality, we show that a metric surface that can be…

Complex Variables · Mathematics 2019-09-20 Toni Ikonen

In a neighborhood of isolated point of a domain of a metric space, a behavior of generalized quasiconformal mappings is studied. It is proved that, mappings mentioned above have continuous extension to the domain at some additional…

Complex Variables · Mathematics 2017-08-04 E. A. Sevost'yanov , A. A. Markysh

We study a non local approximation of the Gaussian perimeter, proving the Gamma convergence to the local one. Surprisingly, in contrast with the local setting, the halfspace turns out to be a volume constrained stationary point if and only…

Analysis of PDEs · Mathematics 2020-11-17 Antonio De Rosa , Domenico Angelo La Manna

In this work, we study a gap phenomenon in locally conformally flat Riemannian manifolds with non-negative Ricci curvature. We construct complete solutions to the Yamabe flow that exhibit instantaneous bounded curvature as they evolve.…

Differential Geometry · Mathematics 2025-04-14 Ming Hsiao , Man-Chun Lee

The behavior of a class of mappings of a domain of Euclidean space is studied. It is established that the indicated class is equicontinuous both at the inner and at the boundary points of the domain if the mappings contained in it satisfy…

Metric Geometry · Mathematics 2019-11-05 E. A. Sevost'yanov , S. O. Skvortsov

This note is concerned with quasi-perfect morphisms between Noetherian algebraic spaces. In particular, we study the local behavior of quasi-perfect proper morphisms. We show that quasi-perfectness of a proper morphism can be detected at…

Algebraic Geometry · Mathematics 2026-03-18 Timothy De Deyn , Pat Lank , Kabeer Manali Rahul

We show that if a domain D in a geodesic metric space is quasimobius to a uniform domain in some metric space, then D is also uniform.

Complex Variables · Mathematics 2007-05-23 Xiangdong Xie

We construct a new type of locally homeomorphic quasiregular mappings in the 3-sphere and discuss their relation to the M.A.Lavrentiev problem, the Zorich map with an essential singularity at infinity, the Fatou's problem and a quasiregular…

Complex Variables · Mathematics 2018-10-17 Boris N. Apanasov

Generalizations of the theorems of Wiman and of Arima on entire functions are proved for spatial quasiregular mappings.

Classical Analysis and ODEs · Mathematics 2010-02-15 Olli Martio , Vladimir M. Miklyukov , Matti K. Vuorinen

Akyol, M. A and \c{S}ahin, B. [Conformal semi-invariant submersions, Commun. Contemp. Math. 19, 1650011 (2017).] introduced the notion of conformal semi-invariant submersions from almost Hermitian manifolds. The present paper deal with the…

Differential Geometry · Mathematics 2018-05-23 Mehmet Akif Akyol

This paper showcases the effectiveness of the quasiconvexity property in addressing the optimal regularity of the temporal derivative and establishes conditions for its continuity in nonlocal time-dependent obstacle problems.

Analysis of PDEs · Mathematics 2026-01-16 Ioannis Athanasopoulos , Luis Caffarelli , Emmanouil Milakis

We obtain Dini conditions with "exponent 2" that guarantee that an asymptotically conformal quasisphere is rectifiable. In particular, we show that for any e>0 integrability of (esssup_{1-t < |x| < 1+t} K_f(x)-1)^{2-e} dt/t implies that the…

Classical Analysis and ODEs · Mathematics 2014-03-13 Matthew Badger , James T. Gill , Steffen Rohde , Tatiana Toro

We study quasiconformal mappings in planar domains $\Omega$ and their regularity properties described in terms of Sobolev, Bessel potential or Triebel-Lizorkin scales. This leads to optimal conditions, in terms of the geometry of the…

Analysis of PDEs · Mathematics 2025-03-14 Kari Astala , Martí Prats , Eero Saksman

We prove that the distortion function of the Gauss map of a harmonic surface coincides with the distortion function of the surface. Consequently, Gauss map of a harmonic surface is ${\mathcal{K}}$ quasiregular if and only if the surface is…

Differential Geometry · Mathematics 2011-03-09 David Kalaj

This paper deals with the existence of asymptotic almost automorphic solution of fractional integro differential equation. We prove the result by using fixed point theorems. We show the result with Lipschitz condition and without Lipschitz…

Classical Analysis and ODEs · Mathematics 2013-04-02 Syed Abbas , Gaston M. N'Guerekata
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