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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2024-25-2-235-242</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1741</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>Краткие сообщения</subject></subj-group></article-categories><title-group><article-title>Опорные барьерные функции для нелинейных параболических задач</article-title><trans-title-group xml:lang="en"><trans-title>The support barrier functions for nonlinear parabolic problems</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Денисов</surname><given-names>Алексей Игоревич</given-names></name><name name-style="western" xml:lang="en"><surname>Denisov</surname><given-names>Alexey Igorevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант</p></bio><bio xml:lang="en"><p>postgraduate student</p></bio><email xlink:type="simple">den_tspu@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Денисов</surname><given-names>Игорь Васильевич</given-names></name><name name-style="western" xml:lang="en"><surname>Denisov</surname><given-names>Igor Vasil’evich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, профессор</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences, professor</p></bio><email xlink:type="simple">den_tspu@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тульский государственный педагогический университет им. Л. Н. Толстого</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tula State Lev Tolstoy Pedagogical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>19</day><month>07</month><year>2024</year></pub-date><volume>25</volume><issue>2</issue><fpage>235</fpage><lpage>242</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Денисов А.И., Денисов И.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Денисов А.И., Денисов И.В.</copyright-holder><copyright-holder xml:lang="en">Denisov A.I., Denisov I.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.chebsbornik.ru/jour/article/view/1741">https://www.chebsbornik.ru/jour/article/view/1741</self-uri><abstract><p>В рамках нелинейного метода угловых пограничных функций существование решений нелинейных краевых задач доказывается через построение барьерных функций. Барьерные функции конструируются через выделенные специальным образом опорные барьеры. Сами опорные барьеры также могут выступать в роли барьерных функций. Получаемые неравенства в свою очередь представляют самостоятельный функциональный интерес.</p></abstract><trans-abstract xml:lang="en"><p>Within the framework of the nonlinear method of angular boundary functions, the existence of solutions to nonlinear boundary value problems is proven through the construction of barrier functions. Barrier functions are constructed through specially designated support barriers. The support barriers themselves can also act as barrier functions. The resulting inequalities, in turn, are of independent functional interest.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>нелинейные краевые задачи</kwd><kwd>барьерные функции</kwd><kwd>функциональные неравенства.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>nonlinear boundary value problems</kwd><kwd>barrier functions</kwd><kwd>functional inequalities.</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Васильева А. Б., Бутузов В. Ф. Асимптотические методы в теории сингулярных возмуще-</mixed-citation><mixed-citation xml:lang="en">Vasilyeva, A. B., Butuzov, V. 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