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<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Archiving and Interchange DTD with OASIS Tables with MathML3 v1.4 20241031//EN" "https://jats.nlm.nih.gov/archiving/1.4/JATS-archive-oasis-article1-4-mathml3.dtd">
<article xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" dtd-version="1.4" article-type="research-article" xml:lang="en"><front><journal-meta><journal-title-group><journal-title xml:lang="ru">Математическая физика и компьютерное моделирование</journal-title></journal-title-group><issn publication-format="print">2587-6325</issn><issn publication-format="electronic">2587-6902</issn></journal-meta><article-meta><article-id pub-id-type="doi">10.15688/mpcm.jvolsu.2025.4.1</article-id><article-categories><subj-group><subject>Other</subject></subj-group></article-categories><title-group><article-title xml:lang="ru">НЕКОТОРЫЕ ДИФФЕРЕНЦИАЛЬНЫЕ СООТНОШЕНИЯ, ОБЕСПЕЧИВАЮЩИЕ ПАРАБОЛИЧНОСТЬ ТИПА</article-title><trans-title-group xml:lang="en"><trans-title>SOME RELATIONS THAT ENSURE THE PARABOLICITY OF THE TYPE</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Кондрашов</surname><given-names>Александр Николаевич</given-names></name><name xml:lang="en"><surname>Kondrashov</surname><given-names>Alexander</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>alexander.kondrashov@volsu.ru</email><contrib-id contrib-id-type="orcid">0000-0003-1614-0393</contrib-id></contrib><aff-alternatives id="aff1"><aff xml:lang="en"><institution>Volgograd State University (Volgograd, Russian Federation)</institution></aff><aff xml:lang="ru"><institution>Волгоградский государственный университет (Волгоград, Российская Федерация)</institution></aff></aff-alternatives></contrib-group><pub-date pub-type="epub" iso-8601-date="2025-12-30"><day>30</day><month>12</month><year>2025</year></pub-date><volume>28</volume><issue>4</issue><fpage>5</fpage><lpage>23</lpage><history><date date-type="received" iso-8601-date="2025-11-04"><day>04</day><month>11</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-11-21"><day>21</day><month>11</month><year>2025</year></date></history><permissions><license xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:title="CC BY 4.0"><ali:license_ref>https://creativecommons.org/licenses/by/4.0/</ali:license_ref><license-p xml:lang="ru">CC BY 4.0</license-p></license></permissions><abstract xml:lang="ru"><p>В случае римановой метрики 𝑑𝑠2 = Σ︀2𝑖,𝑗=1 𝑔𝑖𝑗(𝑧)𝑑𝑥𝑖𝑑𝑥𝑗 , заданной в R2∖𝐾 (𝐾 — компакт), известно, что одним из признаков конформной параболичности абстрактной поверхности 𝐹 = (R2 ∖ 𝐾, 𝑑𝑠2) является условие гармоничности координатных функций в данной метрике: Δ𝑥1 = 0, Δ𝑥2 = 0. Работа посвящена обобщению этого признака. В случае римановой метрики 𝑑𝑠2 = Σ︀2𝑖,𝑗=1 𝑔𝑖𝑗(𝑧)𝑑𝑥𝑖𝑑𝑥𝑗 , заданной в R2∖𝐾 (𝐾 — компакт), известно, что одним из признаков конформной параболичности абстрактной поверхности 𝐹 = (R2 ∖ 𝐾, 𝑑𝑠2) является условие гармоничности координатных функций в данной метрике: Δ𝑥1 = 0, Δ𝑥2 = 0.Работа посвящена обобщению этого признака.</p></abstract><abstract xml:lang="en" abstract-type="summary"><p>This paper investigates sufficient conditions for the parabolicity type of the domain R2 ∖ 𝐾, where 𝐾 is a compact set, with respect to a general variational functional 𝐼Φ. A known criterion for the conformal parabolicity of a Riemannian metric requires that the coordinate functions be harmonic. We significantly generalize this result by establishing new differential, rather than modulcapacitary, conditions for Φparabolicity at infinity. The work introduces and studies a special class of differential 1forms, Λqc𝑥2(𝐷), which generate quasiconformal mappings used to construct appropriate mapping functions. The main results, formulated as Theorems 1 and 2, provide verifiable criteria involving the interplay between the functional Φ, a form Ψ of parabolic type, and auxiliary differential forms _ and !. These criteria are expressed via the essential boundedness of certain quantities, such as 𝒱_,Φ,Ψ, and differential inequalities involving the Hodge operator. The proofs leverage techniques from quasiconformal mapping theory, potential theory (including Perron’s method), and the calculus of variations. A key corollary generalizes the harmonic coordinate condition to the case of quadratic functionals associated with uniformly elliptic operators in divergence form. The obtained conditions are shown to be checkable in specific model situations.</p></abstract><kwd-group xml:lang="ru"><kwd>параболичность типа</kwd><kwd>вариационная емкость</kwd><kwd>квазиконформные отображения</kwd><kwd>эллиптические операторы</kwd><kwd>метод Перрона</kwd></kwd-group><kwd-group xml:lang="en"><kwd>parabolicity of the type</kwd><kwd>variational capacity</kwd><kwd>quasiconformal mappings</kwd><kwd>elliptic operators</kwd><kwd>Perron’s method</kwd></kwd-group></article-meta></front><back><ref-list><ref id="ref1"><mixed-citation publication-type="other" xml:lang="ru">Альфорс, Л. Лекции по квазиконформным отображениям / Л. Альфорс. — М. : Мир, 1969. — 134 c.</mixed-citation></ref><ref id="ref2"><mixed-citation publication-type="other" xml:lang="ru">Белинский, П. П. Общие свойства квазиконформных отображений / П. П. Белинский. — Новосибирск : Наука. 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