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<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Contemporary Mathematics. Fundamental Directions</journal-id><journal-title-group><journal-title xml:lang="en">Contemporary Mathematics. Fundamental Directions</journal-title><trans-title-group xml:lang="ru"><trans-title>Современная математика. Фундаментальные направления</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2413-3639</issn><issn publication-format="electronic">2949-0618</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">43911</article-id><article-id pub-id-type="doi">10.22363/2413-3639-2025-71-1-125-146</article-id><article-id pub-id-type="edn">UQKNFN</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Local renormalized solutions of elliptic equations with variable exponents in unbounded domains</article-title><trans-title-group xml:lang="ru"><trans-title>Локальные ренормализованные решения эллиптических уравнений с переменными показателями в неограниченных областях</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kozhevnikova</surname><given-names>L. M.</given-names></name><name xml:lang="ru"><surname>Кожевникова</surname><given-names>Л. М.</given-names></name></name-alternatives><email>kosul@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ufa University of Science and Technology</institution></aff><aff><institution xml:lang="ru">Уфимский университет науки и технологий</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Elabuga Institute of Kazan Federal University</institution></aff><aff><institution xml:lang="ru">Елабужский Институт Казанского Федерального университета</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2025</year></pub-date><volume>71</volume><issue>1</issue><issue-title xml:lang="en">Nonlocal and nonlinear problems</issue-title><issue-title xml:lang="ru">Нелокальные и нелинейные задачи</issue-title><fpage>125</fpage><lpage>146</lpage><history><date date-type="received" iso-8601-date="2025-04-21"><day>21</day><month>04</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Kozhevnikova L.M.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Кожевникова Л.М.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Kozhevnikova L.M.</copyright-holder><copyright-holder xml:lang="ru">Кожевникова Л.М.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/CMFD/article/view/43911">https://journals.rudn.ru/CMFD/article/view/43911</self-uri><abstract xml:lang="en"><p>In this paper, we consider a second-order quasilinear elliptic equation with variable nonlinearity exponents and a locally summable right-hand side. The stability property is established and, as a consequence, the existence of a local renormalized solution of the Dirichlet problem in an arbitrary unbounded domain is proved.</p></abstract><trans-abstract xml:lang="ru"><p>В работе рассматривается квазилинейное эллиптическое уравнение второго порядка с переменными показателями нелинейностей и локально суммируемой правой частью. Установлено свойство устойчивости и как следствие доказано существование локального ренормализованного решения задачи Дирихле в произвольной неограниченной области.</p></trans-abstract><kwd-group xml:lang="en"><kwd>quasilinear elliptic equation</kwd><kwd>variable growth exponent</kwd><kwd>unbounded domain</kwd><kwd>Dirichlet problem</kwd><kwd>stability of solution</kwd><kwd>local renormalized solution</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>квазилинейное эллиптическое уравнение</kwd><kwd>переменный показатель роста</kwd><kwd>неограниченная область</kwd><kwd>задача Дирихле</kwd><kwd>устойчивость решения</kwd><kwd>локальное ренормализованное решение</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Данфорд Н., Шварц Дж.Т. Линейные операторы. Общая теория.-M.: ИЛ, 1962.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Жиков В.В. 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