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We have studied the mappings that satisfy the Poletsky-type inverse inequality in the domain of the Euclidean space. It is proved that the uniform boundary of the family of such mappings is a discrete mapping. We separately considered…

Complex Variables · Mathematics 2024-04-29 E. O. Sevost'yanov , V. A. Targonskii

We study problems related to continuous boundary extension of mappings of Orlicz-Sobolev classes in terms of prime ends. The results we obtain concern the case when the mappings are open, discrete, but not closed (not preserving the…

Complex Variables · Mathematics 2026-05-18 Zarina Kovba , Evgeny Sevost'yanov

The manuscript is devoted to the boundary behavior of mappings with bounded and finite distortion, which has been actively studied recently. We consider mappings of domains of the Euclidean space that satisfy the inverse Poletsky inequality…

Complex Variables · Mathematics 2026-04-14 Victoria Desyatka , Evgeny Sevost'yanov

It is established a continuous boundary extension of some class of mappings. Under some additional conditions, we have established that this extension is light in the closure of the definition domain. Under some stronger conditions, we also…

Complex Variables · Mathematics 2022-11-08 Evgeny Sevost'yanov

We study mappings that satisfy the inverse Poletsky inequality in a domain of the Euclidean space. Under certain conditions on the definition and mapped domains, it is established that they have a continuous extension to the boundary in…

Complex Variables · Mathematics 2022-11-10 Evgeny Sevost'yanov

We consider mappings that distort the modulus of families of paths in the opposite direction in the manner of Poletsky's inequality. Here we study the case when the mappings are not closed, in particular, they do not preserve the boundary…

Complex Variables · Mathematics 2024-09-06 Evgeny Sevost'yanov , Victoria Desyatka Zarina Kovba

We study mappings defined in the domain of a metric space that distort the modulus of families of paths by the type of the inverse Poletskii inequality. Under certain conditions, it is proved that such mappings have a continuous extension…

Complex Variables · Mathematics 2021-07-19 Evgeny Sevost'yanov

The article is devoted to the study of mappings that satisfy the so-called inverse Poletsky inequality. We consider mappings of quasiextremal distance domains, domains with a locally quasiconformal boundary, and domains which are regular in…

Complex Variables · Mathematics 2023-10-03 M. V. Androschuk , O. P. Dovhopiatyi , N. S. Ilkevych , E. A. Sevost'yanov

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 manuscript is devoted to the boundary behavior of mappings with bounded and finite distortion. We consider mappings of domains of the Euclidean space that satisfy weighted Poletsky inequality. Assume that, the definition domain is…

Complex Variables · Mathematics 2024-04-08 Victoria Desyatka , Evgeny Sevost'yanov

This manuscript is devoted to the study of mappings, satisfying the upper weighted Poletsky inequality. We study the case where the boundary of the domain may not be preserved under the mapping and, besides that, the majorant from the above…

Complex Variables · Mathematics 2026-03-03 Victoria Desyatka , Oleksandr Dovhopiatyi , Evgeny Sevost'yanov

The paper is devoted to the study of mappings with non--bounded characteristics of quasiconformality. We investigate the interconnection between the classes of the so-called ring $Q$-mappings and lower ring $Q$-mappings. It is proved that…

Complex Variables · Mathematics 2014-09-18 Evgeny Sevost'yanov

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

For mapping with branching points that satisfy the inverse inequality of Poletsky, we obtained the results of their continuous boundary extension in terms of prime ends. Under certain conditions, the specified classes od mappings are also…

Complex Variables · Mathematics 2020-04-13 E. A. Sevost'yanov

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

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

This paper is devoted to the study of the boundary behavior of Orlicz-Sobolev classes that may not preserve the boundary under mapping. Under certain conditions, we show that these mappings have a continuous extension to the boundary of…

Complex Variables · Mathematics 2026-02-10 Victoria Desyatka , Alina Halyts'ka , Evgeny Sevost'yanov

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

For some class of mappings satisfying upper modular estimates with respect to families of curves, a behavior of the corresponding inverse mappings is investigated. In the terms of prime ends, it is proved that, families of such…

Metric Geometry · Mathematics 2016-05-31 R. R. Salimov , E. A. Sevost'yanov

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
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