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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 prove that open discrete mappings of Sobolev classes $W_{\rm loc}^{1, p},$ $p>n-1,$ with locally integrable inner dilatations admit $ACP_p^{\,-1}$-property, which means that these mappings are absolutely continuous on almost all preimage…

Complex Variables · Mathematics 2015-04-22 Anatoly Golberg , Evgeny Sevost'yanov

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

We study mappings with bounded (p,q)-distortion associated to Sobolev spaces on Carnot groups. Mappings of such type have applications to the Sobolev type embedding theory and classification of manifolds. For this class of mappings, we…

Complex Variables · Mathematics 2008-04-29 A. Ukhlov , S. K. Vodopyanov

We study generalized quasiconformal mappings in the context of the inverse Poletsky inequality. We consider the local behavior and the boundary behavior of mappings with the inverse Poletsky inequality. In particular, we obtain logarithmic…

Complex Variables · Mathematics 2023-06-06 Vladimir Gol'dshtein , Evgeny Sevost'yanov , Alexander Ukhlov

We consider mappings of domains of Riemannian manifolds that admit branch points and satisfy a certain condition regarding the distortion of the modulus of families of paths. We have established logarithmic estimates of distance distortion…

Complex Variables · Mathematics 2021-04-01 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

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 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 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

The paper is devoted to the study of homeomoephisms with finite distortion on the plane with use of the modulus techniques.

Complex Variables · Mathematics 2013-03-01 R. Salimov

We have studied homeomorphisms that satisfy the Poletsky-type inverse inequality in the domain of the Euclidean space. It is proved that the uniform limit of the family of such homeomorphisms is either a homeomorphism into the Euclidean…

Complex Variables · Mathematics 2024-06-06 Evgeny Sevost'yanov , Valery Targonskii

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

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

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 this work a local inequality is provided which bounds the distance of an integral varifold from a multivalued plane (height) by its tilt and mean curvature. The bounds obtained for the exponents of the Lebesgue spaces involved are shown…

Differential Geometry · Mathematics 2012-01-05 Ulrich Menne

We study mappings satisfying the inverse Poletsky-type inequality in a domain of the Euclidean space. Such inequalities are well known and play an important role in the study of quasiconformal and quasiregular mappings. We consider the case…

Complex Variables · Mathematics 2026-04-08 Zarina Kovba , Evgeny Sevost'yanov

We study mappings that satisfy the inverse modulus inequality of Poletsky type with respect to $p$-modulus. Given $n-1<p\leqslant n,$ we show that, the image of some ball contains a fixed ball under mappings mentioned above. This statement…

Complex Variables · Mathematics 2026-03-31 Evgeny Sevost'yanov , Valery Targonskii , Nataliya Ilkevych

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

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