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For mappings in metric spaces satisfying one inequality with respect to modulus of families of curves, there is proved a lightness of the uniform limit of these mappings. It is proved that, the uniform limit of these mappings is light…

Metric Geometry · Mathematics 2018-01-31 E. A. Sevost'yanov , S. A. Skvortsov

This paper is devoted to the study of mappings with finite distortion, in particular, mappings satisfying the inverse Poletskii inequality. We study the problem of equicontinuity of families of such mappings in a given domain. We establish…

Complex Variables · Mathematics 2026-05-21 Miodrag Mateljevic , Evgeny Sevost'yanov

We study branching mappings that satisfy some condition of distortion of the modulus of families of paths. In a situation where the definition domain of mappings is locally connected on its boundary, the mapped domain is regular, and the…

Complex Variables · Mathematics 2020-04-13 E. A. Sevost'yanov , N. S. Ilkevych

The paper is devoted to the study of mappings with finite distortion, actively studied recently. For mappings whose inverse satisfy the Poletsky inequality, the results on boundary behavior in terms of prime ends are obtained. In…

Complex Variables · Mathematics 2019-01-15 E. A. Sevost'yanov , S. A. Skvortsov , N. S. Ilkevych

The present paper is devoted to the study of space mappings, which are more general than quasiregular. The so--called modulus inequalities for some class of mappings are obtained. In particular, the analogues of the well--known Poletskii…

Complex Variables · Mathematics 2012-08-21 Ruslan Salimov , Evgeny Sevost'yanov

In this article we study fine regularity properties for mappings of finite distortion. Our main theorems yield strongly localized regularity results in the borderline case in the class of maps of exponentially integrable distortion.…

Complex Variables · Mathematics 2021-09-28 Olli Hirviniemi , István Prause , Eero Saksman

This article is devoted to the study of mappings defined in the region on the plane. Under certain conditions, the upper estimate of the distortion of the modulus of families of paths is obtained. Similarly, the upper estimate of the…

Complex Variables · Mathematics 2022-07-22 E. Sevost'yanov , V. Targonskii

We establish the optimal regularity for the distortion of inverses of mappings of finite distortion with logarithm-iterated style subexponentially integrable distortion, which generalizes the Theorem 1. of [J. Gill, Ann. Acad. Sci. Fenn.…

Complex Variables · Mathematics 2016-04-11 Haiqing Xu

The article is devoted to the study of mappings with finite distortion in metric spaces. Analogues of results relating to equicontinuity and normality of families of quasiregular mappings are obtained. It is proved that the indicated…

Complex Variables · Mathematics 2019-01-23 Evgeny Sevost'yanov , Sergei Skvortsov , Evgeniy Petrov

We have studied the local and boundary behavior of mappings satisfying one estimate of the distortion of the modulus of families of paths. In particular, we have obtained conditions under which the families of the indicated mappings are…

Classical Analysis and ODEs · Mathematics 2019-04-03 E. A. Sevost'yanov , S. O. Skvortsov , O. P. Dovhopiatyi

The article is devoted to mappings with bounded and finite distortion of plane domains. Our investigations are devoted to the connection between mappings of the Sobolev class and upper bounds for the distortion of the modulus of families of…

Complex Variables · Mathematics 2022-05-09 R. R. Salimov , E. A. Sevost'yanov , V. A. Targonskii

We study quasiconformal mappings of the unit disk that have planar extension with controlled distortion. For these mappings we prove a bound for the modulus of continuity of the inverse map, which somewhat surprisingly is almost as good as…

Complex Variables · Mathematics 2021-10-04 Olli Hirviniemi , Lauri Hitruhin , István Prause , Eero Saksman

The paper is devoted to the study of the boundary behavior of mappings. We consider mappings that satisfy inverse moduli inequalities of Poletskii type, under which the images of the domain under the mappings may change. It is proved that a…

Complex Variables · Mathematics 2026-05-21 Zarina Kovba , Evgeny Sevost'yanov

For mappings in metric spaces satisfying one inequality with respect to modulus of families of curves, there is proved a lightness of preimage under the mapping. It is proved that, the mappings, satisfying estimate mentioned above, are…

Complex Variables · Mathematics 2015-12-14 Evgeny Sevost'yanov , Sergei Skvortsov

In this paper we study a continuity of the "values" of modular functions at the real quadratic numbers which are defined in terms of their cycle integrals along the associated closed geodesics. Our main theorem reveals a more finer…

Number Theory · Mathematics 2019-11-12 Yuya Murakami

We study the possibility of a continuous extension of a class of mappings to an isolated point on the boundary of a domain. We show that if some characteristic of this mapping is integrable on almost all spheres in the neighborhood of at…

Complex Variables · Mathematics 2025-11-04 Victoria Desyatka , Evgeny Sevost'yanov

We show that a general miraculous cancellation formula, the divisibility of certain characteristic numbers and some other topologiclal results are con- sequences of the modular invariance of elliptic operators on loop spaces. Previously we…

High Energy Physics - Theory · Physics 2011-07-19 Kefeng Liu

We study mappings satisfying some estimate of distortion of modulus of families of paths. Under some conditions on definition and mapped domains, we have proved that these mappings are logarithmic H\"{o}lder continuous at boundary points.

Complex Variables · Mathematics 2023-04-04 Oleksandr Dovhopiatyi , Evgeny Sevost'yanov

We consider mappings satisfying a certain estimate of the distortion of the modulus of families of paths, similar to the geometric definition of quasiconformal mappings. Under appropriate restrictions, we show that the class of such…

Complex Variables · Mathematics 2026-04-30 D. Romash , E. Sevost'yanov

We prove a compactness result for gradient flow lines in a general set-up which comprises both the situation of Morse gradient flow lines as well as Floer cylinders converging to a critical submanifold respectively. For the compactness…

Symplectic Geometry · Mathematics 2026-04-23 Tom Stalljohann
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