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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.2023.3.1</article-id><article-categories><subj-group><subject>Other</subject></subj-group></article-categories><title-group><article-title xml:lang="ru">О существовании и единственности положительного решения краевой задачи для одного нелинейного обыкновенного дифференциального уравнения четвертого порядка</article-title><trans-title-group xml:lang="en"><trans-title>On the Existence and Uniqueness of a Positive Solution to a Boundary Value Problem for a Nonlinear Ordinary Differential Fourth Order Equation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Абдурагимов</surname><given-names>Гусен Эльдерханович</given-names></name><name xml:lang="en"><surname>Abduragimov</surname><given-names>Gusen E.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>gusen_e@mail.ru</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0542-1149</contrib-id></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Абдурагимова</surname><given-names>Патимат Эльдерхановна</given-names></name><name xml:lang="en"><surname>Abduragimova</surname><given-names>Patimat E.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>abpatuka@mail.ru</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9050-0209</contrib-id></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="ru"><surname>Курамагомедова</surname><given-names>Мадина Магомедрасуловна</given-names></name><name xml:lang="en"><surname>Kuramagomedova</surname><given-names>Madina M.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><email>madina19.12@mail.ru</email><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6424-9348</contrib-id></contrib><aff-alternatives id="aff1"><aff xml:lang="en"><institution>Dagestan State University (Makhachkala, Russian Federation)</institution></aff><aff xml:lang="ru"><institution>Дагестанский государственный университет (Махачкала, Российская Федерация)</institution></aff></aff-alternatives></contrib-group><pub-date pub-type="epub" iso-8601-date="2023-10-24"><day>24</day><month>10</month><year>2023</year></pub-date><volume>26</volume><issue>3</issue><fpage>5</fpage><lpage>11</lpage><history><date date-type="received" iso-8601-date="2023-04-26"><day>26</day><month>04</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-07-03"><day>03</day><month>07</month><year>2023</year></date></history><permissions><license xlink:href="https://creativecommons.org/licenses/by-nc/4.0/" xlink:title="CC BY-NC 4.0"><ali:license_ref>https://creativecommons.org/licenses/by-nc/4.0/</ali:license_ref><license-p xml:lang="ru">CC BY-NC 4.0</license-p></license></permissions><abstract xml:lang="ru"><p>В статье рассматривается двухточечная краевая задача с однородными граничными условиями для одного нелинейного обыкновенного дифференциального уравнения четвертого порядка. С помощью теоремы Го — Красносельского получены достаточные условия существования положительного решения рассматриваемой задачи. Для доказательства единственности положительного решения был привлечен принцип сжатых отображений. Приведен пример, иллюстрирующий выполнение полученных достаточных условий однозначной разрешимости рассматриваемой задачи.</p></abstract><abstract xml:lang="en" abstract-type="summary"><p>The article deals with the boundary value problem. This problem is reduced to an equivalent integral equation, the kernel of which is the Green’s function. Using the well-known Go—Krasnoselsky theorem, we prove the existence of at least one positive solution in some cone of the problem under consideration. Further, using a priori estimates, relying on the principle of compressed mappings, the uniqueness of such a solution is established. In conclusion, an example illustrating the results obtained is given.</p></abstract><kwd-group xml:lang="ru"><kwd>краевая задача</kwd><kwd>положительное решение</kwd><kwd>функция Грина</kwd><kwd>конус</kwd><kwd>дифференциальные уравнения.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>boundary value problem</kwd><kwd>positive solution</kwd><kwd>Green’s function</kwd><kwd>cone</kwd><kwd>differential equations</kwd></kwd-group></article-meta></front><back><ref-list><ref id="ref1"><mixed-citation publication-type="other" xml:lang="ru">Абдурагимов, Г. Э. О существовании и единственности положительного решения краевой задачи для нелинейного обыкновенного дифференциального уравнения четного порядка / Г. Э. Абдурагимов, П. Э. Абдурагимова, М. М. Курамагомедова // Вестник российских университетов. Математика. — 2021. — Т. 26, вып. 136. — C. 341–347.</mixed-citation></ref><ref id="ref2"><mixed-citation publication-type="other" xml:lang="ru">Абдурагимов, Г. Э. 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