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The article is devoted to the study of mappings that distort the modulus of families of paths by the Poletsky inequality type. At boundary points of a domain, we have obtained the H\"{o}lder inequality for such mappings, provided that their…

Complex Variables · Mathematics 2023-05-19 Evgeny Sevost'yanov

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

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

We investigate non-homeomorphic mappings of Riemannian surfaces of Sobolev class. We have obtained some estimates of distortion of moduli of families of curves. We have proved that, under some conditions, these mappings have a continuous…

Complex Variables · Mathematics 2022-09-27 Evgeny Sevost'yanov , Oleksandr Dovhopiatyi , Nataliya Ilkevych , Vitalina Kalenska

A boundary behavior of closed open discrete mappings of Sobolev and Orlicz--Sobolev classes in ${\Bbb R}^n,$ $n\ge 3,$ is studied. It is proved that, mappings mentioned above have a continuous extension to boundary point $x_0$ of a domain…

Complex Variables · Mathematics 2016-02-15 Evgeny Sevost'yanov

A boundary behavior of mappings, which are closely related with Sobolev and Orlicz--Sobolev classes in the plane and in the space, is investigated. There are obtained theorems on boundary behavior of classes mentioned above.

Complex Variables · Mathematics 2017-01-24 Evgeny Sevost'yanov

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

There are investigated problems connected with local and boundary properties of Orlicz--Sobolev classes of finite distortion which are actively studied last time. It is showed that, a locally uniform limit of local homeomorphisms of…

Complex Variables · Mathematics 2014-04-22 Evgeny Sevost'yanov

In this article, we consider the H\"{o}lder continuity of injective maps in Orlicz-Sobolev classes defined on the unit ball. Under certain conditions on the growth of dilatations, we obtain the H\"{o}lder continuity of the indicated class…

Complex Variables · Mathematics 2022-08-05 Miodrag Mateljević , Ruslan Salimov , Evgeny Sevost'Yanov

For some class of mappings, there are investigated problems connected with a possibility of continuous extension to a boundary on Riemannian manifolds. In particular, for so-called ring mappings, there is proved a result related to…

Complex Variables · Mathematics 2015-12-16 D. P. Ilyutko , E. A. Sevost'yanov

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

The article is devoted to the study of mappings that distort the modulus of families of paths according to the Poletsky inequality type. At the boundary points of the domain, we have obtained an estimate of the distance distortion for such…

Complex Variables · Mathematics 2023-05-19 O. P. Dovhopiatyi , E. A. Sevost'yanov

In terms of dilatations, it is proved a series of criteria for continuous and homeomorphic extension to the boundary of mappings with finite distortion between regular domains on the Riemann surfaces

Complex Variables · Mathematics 2016-10-18 Vladimir Ryazanov , Sergei Volkov

We show that homeomorphisms $f$ in ${\Bbb R}^n$, $n\geqslant3$, of finite distortion in the Orlicz--Sobolev classes $W^{1,\varphi}_{\rm loc}$ with a condition on $\varphi$ of the Calderon type and, in particular, in the Sobolev classes…

Complex Variables · Mathematics 2014-08-05 Denis Kovtonyuk , Vladimir Ryazanov

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

A local behavior of closed open discrete mappings of Orlicz--Sobolev classes in ${\Bbb R}^n,$ $n\ge 3,$ is studied. It is proved that, mappings mentioned above have continuous extension to isolated boundary point $x_0$ of a domain…

Complex Variables · Mathematics 2014-12-30 Evgeny Sevost'yanov

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

A behavior of homeomorphisms of Orlicz--Sobolev classes in a closure of a domain is investigated. There are obtained theorems about equicontinuity of classes mentioned above in terms of prime ends of regular domains. In particular, it is…

Complex Variables · Mathematics 2017-01-24 Evgeny Sevost'yanov

In the present paper, we investigate non-homeomorphic mappings of Riemannian surfaces of Sobolev class. We have obtained some estimates of distortion of moduli of families of curves. As consequence, we have obtained results about the…

Complex Variables · Mathematics 2021-04-20 E. A. Sevost'yanov

A behavior of homeomorphisms of Orlicz classes in a closure of a domain is investigated. It is proved that above classes are equicontinuous in the closure of domains with some restrictions on it's boundaries provided that the corresponding…

Complex Variables · Mathematics 2016-03-15 E. A. Petrov , E. A. Sevost'yanov
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