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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2026-17-2-172-178</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-1757</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="en"><subject>MATHEMATICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МАТЕМАТИКА</subject></subj-group></article-categories><title-group><article-title>The Cauchy problem for a fourth-order equation involving a fractional derivative in the Caputo sense</article-title><trans-title-group xml:lang="ru"><trans-title>Задача Коши для уравнения четвертого порядка с дробной производной в смысле Капуто</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7204-9127</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иргашев</surname><given-names>Б. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Irgashev</surname><given-names>B. Yu.</given-names></name></name-alternatives><bio xml:lang="en"><p>Namangan </p></bio><email xlink:type="simple">bahromirgasev@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>University of Business and Science ;  Institute of Mathematics named after V.I.Romanovsky of the Academy of Sciences of the Republic of Uzbekistan</institution><country>Uzbekistan</country></aff><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>30</day><month>04</month><year>2026</year></pub-date><volume>17</volume><issue>2</issue><fpage>172</fpage><lpage>178</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Irgashev B.Y., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Иргашев Б.Ю.</copyright-holder><copyright-holder xml:lang="en">Irgashev B.Y.</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://nanojournal.ifmo.ru/jour/article/view/1757">https://nanojournal.ifmo.ru/jour/article/view/1757</self-uri><abstract><p>In this article, the Cauchy problem in a half-plane is studied for a fourth-order inhomogeneous equation with a fractional derivative in the Caputo sense. The uniqueness of the solution is demonstrated using the Laplace transform. In constructing the solution, partial solutions expressed in terms of Wright functions are first found. Green’s functions are then constructed using these partial solutions. The solution is constructed explicitly using the Green function. An explicit form of the fundamental solution is also obtained.</p></abstract><trans-abstract xml:lang="ru"><p>В данной статье исследуется задача Коши в полуплоскости для неоднородного уравнения четвертого порядка с дробной производной в смысле Капуто. Единственность решения показывается с помощью преобразования Лапласа. При построении решения сначала находятся частные решения, выраженные через функции Райта. Затем с помощью этих частных решений строятся функции Грина. Решение строится в явном виде с использованием функции Грина. Также получен явный вид фундаментального решения.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>уравнение четвертого порядка</kwd><kwd>задача Коши</kwd><kwd>производная Капуто</kwd><kwd>функция Райта</kwd><kwd>асимптотика</kwd><kwd>фундаментальное решение</kwd><kwd>существование</kwd><kwd>единственность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Fourth-order equation</kwd><kwd>Cauchy problem</kwd><kwd>Caputo derivative</kwd><kwd>Wright function</kwd><kwd>asymptotics</kwd><kwd>fundamental solution</kwd><kwd>existence</kwd><kwd>uniqueness</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">Tarasov V.E. Review of some promising fractional physical models. International Journal of Modern Physics B, 2013, 27(9), P. 1330005.</mixed-citation><mixed-citation xml:lang="en">Tarasov V.E. Review of some promising fractional physical models. 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