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We study the asymptotic behavior of homeomorphic solutions of the Beltrami equation with different conditions on the dilatation at infinity in this paper.

Complex Variables · Mathematics 2015-05-12 O. Afanasieva , R. Salimov

We have found one of the possible conditions under which the Beltrami equation with degeneration of ellipticity has a continuous solution of the Sobolev class. With some additional requirements, this solution is homeomorphic

Complex Variables · Mathematics 2019-05-27 Evgeny Sevost'yanov

In this article, first we give a general lemma on the existence of regular homeomorphic solutions $f$ with the hydrodynamic normalization $f(z)=z+o(1)$ as $z\to\infty$ to the degenerate Beltrami equations $\overline{\partial}f=\mu\,\partial…

Complex Variables · Mathematics 2022-01-17 V. Gutlyanskii , V. Ryazanov , E. Sevos'yanov , E. Yakubov

We consider problems concerning the existence of solutions of the Beltrami equations and their convergence in the entire complex plane. We are mainly interested in the case when these solutions satisfy the so-called hydrodynamic…

Complex Variables · Mathematics 2022-03-08 Evgeny Sevost'yanov , Oleksandr Dovhopiatyi

We investigate the asymptotic behavior at infinity of regular homeomorphic solutions of the nonlinear Beltrami equation with the Jacobian on the right-hand side. The sharpness of the above bounds is illustrated by several examples.

Analysis of PDEs · Mathematics 2024-05-09 Igor Petkov , Ruslan Salimov , Mariia Stefanchuk

We give here results on the existence of nonclassical solutions of the Hilbert boundary value problem in terms of the so-called angular limits (along nontangent curves to the boundary) for Beltrami equations with sources in Jordan domains…

Analysis of PDEs · Mathematics 2022-06-13 V. Gutlyanski\uı , O. Nesmelova , V. Ryazanov , E. Yakubov

We show that arbitrary homeomorphic solutions to the Beltrami equations with generalized derivatives satisfy certain moduli inequalities. On this basis, we develope the theory of the boundary behavior of such solutions and prove a series of…

Complex Variables · Mathematics 2012-01-27 Denis Kovtonyuk , Igor Petkov , Vladimir Ryazanov , Ruslan Salimov

In this paper, the estimate for growth of homeomorphic solutions of the Beltrami equation at infinity is obtained, provided that the dilatation quotient has a global finite mean oscillation.

Analysis of PDEs · Mathematics 2022-01-07 Ruslan Salimov , Mariia Stefanchuk

We consider ($-\alpha$)-homogeneous solutions to the stationary incompressible Euler equations in $\mathbb{R}^{3}\backslash\{0\}$ for $\alpha\geq 0$ and in $\mathbb{R}^{3}$ for $\alpha<0$. Shvydkoy (2018) demonstrated the nonexistence of…

Analysis of PDEs · Mathematics 2023-05-11 Ken Abe

In this article we study the structure of solutions to the one-phase Bernoulli problem that are modeled either infinitesimally or at infinity by one-homogeneous solutions with an isolated singularity. In particular, we prove a uniqueness of…

Analysis of PDEs · Mathematics 2025-11-12 Max Engelstein , Daniel Restrepo , Zihui Zhao

In this note, we establish the interior $BMO$ regularity of weak solutions to uniformly elliptic equations in divergence form. Moreover, the assumptions on the coefficients are nearly optimal.

Analysis of PDEs · Mathematics 2026-02-12 Yuanyuan Lian

The present paper is devoted to the study of semi-linear Beltrami equations which are closely relevant to the corresponding semi-linear Poisson type equations of mathematical physics on the plane in anisotropic and inhomogeneous media. In…

Complex Variables · Mathematics 2022-12-12 V. Gutlyanskii , O. Nesmelova , V. Ryazanov , E. Yakubov

The goal of this work is to present an approach to the homogeneous Boltzmann equation for Maxwellian molecules with a physical collision kernel which allows us to construct unique solutions to the initial value problem in a space of…

Analysis of PDEs · Mathematics 2009-07-13 Marco Cannone , Grzegorz Karch

We compute, using matched asymptotic expansions, the long-time asymptotics of homoenergetic solutions to the nonlinear Boltzmann equation, in presence of a shear term, in the hyperbolic dominated regime, for homogeneous collision kernels…

Analysis of PDEs · Mathematics 2026-05-28 Alessia Nota , Juan J. L. Velázquez

For a class of linear elliptic equations of general type with rapidly oscillating coefficients, we use the sigma-convergence method to prove the homogenization result and a corrector-type result. In the case of asymptotic periodic…

Analysis of PDEs · Mathematics 2019-11-26 Renata Bunoiu , Giuseppe Cardone , Willi Jäger , Jean Louis Woukeng

In this paper we study a generalized class of Maxwell-Boltzmann equations which in addition to the usual collision term contains a linear deformation term described by a matrix A. This class of equations arises, for instance, from the…

Mathematical Physics · Physics 2020-10-28 Alexander Bobylev , Alessia Nota , Juan J. L. Velázquez

In Newton's and in Einstein's theory we give criteria on the equation of state of a barotropic perfect fluid which guarantee that the corresponding one-parameter family of static, spherically symmetric solutions has finite extent. These…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Walter Simon

We have proved theorems on compact classes of homeomorphisms with hydrodynamic normalization that are solutions of the Beltrami equation, whose characteristics are compactly supported and satisfy certain constraints of an integral type. As…

Complex Variables · Mathematics 2020-12-29 E. A. Sevost'yanov , O. P. Dovhopiatyi

It is studied the Hilbert boundary value problem for the nondegenerate Beltrami equations in domains $D$ of the complex plane $\mathbb C$ with the so--called quasihyperbolic boundary condition. It is proved the existence of solutions of…

Complex Variables · Mathematics 2019-11-22 V. Gutlyanskii , V. Ryazanov , E. Yakubov , A. Yefimushkin

Asymptotic solutions are derived for inhomogeneous differential equations having a large real or complex parameter and a simple turning point. They involve Scorer functions and three slowly varying analytic coefficient functions. The…

Classical Analysis and ODEs · Mathematics 2021-03-02 T. M. Dunster
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