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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

A boundary behavior of ring mappings on Riemannian manifolds, which are generalization of quasiconformal mappings by Gehring, is investigated. In terms of prime ends, there are obtained theorems about continuous extension to a boundary of…

Complex Variables · Mathematics 2017-05-22 D. P. Ilyutko , E. A. 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

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

Theorems on continuous extension on boundary for one class of open discrete mappings between Riemannian manifolds are obtained. In particular, there is proved that, open discrete ring $Q$-mappings $f:D\rightarrow D^{\,\prime}$ are extend to…

Complex Variables · Mathematics 2015-04-14 Evgeny Sevost'yanov

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

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

We consider open discrete mappings of Riemannian manifolds that satisfy some modulus inequality. We investigate the possibility of a continuous extension of such mappings to an isolated point on the boundary. It is proved that, these…

Complex Variables · Mathematics 2023-09-28 V. S. Desyatka , E. A. 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 some problems related to the boundary behavior of maps of domains of Riemannian surfaces. In particular, for mappings satisfying the inverse Poletsky type modulus inequality, we establish the possibility of their continuous…

Complex Variables · Mathematics 2023-03-06 E. A. Sevost'yanov

Open discrete mappings with a modulus condition in metric spaces are considered. Some results related to local behavior of mappings as well as theorems about continuous extension to a boundary are proved.

Complex Variables · Mathematics 2016-01-06 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

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

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

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

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

We study the local behavior of the closed-open discrete maps of Orlich--Sobolev classes in ${\Bbb R}^n,$ $n\geqslant 3.$ It was found that these mappings $f$ have continuous extension in isolated point $x_0$ in $D\setminus\{x_0 \},$ as soon…

Complex Variables · Mathematics 2016-07-05 E. A. Petrov , R. R. Salimov , E. A. Sevost'yanov

We introduce boundary special generic maps, a class of submersions from manifolds with boundary to Euclidean spaces whose restriction to the boundary has only boundary definite fold points as its singular points. We derive the…

Geometric Topology · Mathematics 2026-04-07 Koki Iwakura

We investigate distortion estimates for mappings at boundary points of a domain. We consider mappings of the Sobolev and Orlicz-Sobolev classes and some other classes of mappings that do not preserve the boundary of a domain. For above…

Complex Variables · Mathematics 2026-03-17 Victoria Desyatka , Zarina Kovba , Evgeny Sevost'yanov

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
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