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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">10.17586/2220-8054-2026-17-2-165-171</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-1756</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>Oscillation results for second-order delay differential equation with several deviating arguments</article-title><trans-title-group xml:lang="ru"><trans-title>Результаты анализа колебаний для дифференциального уравнения второго порядка с запаздыванием и несколькими отклоняющимися аргументами</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-4402-7036</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Анбарасу</surname><given-names>П.</given-names></name><name name-style="western" xml:lang="en"><surname>Anbarasu</surname><given-names>P.</given-names></name></name-alternatives><bio xml:lang="en"><p>PG &amp; Research Department of Mathematics</p><p>Chennai-600 030 </p></bio><email xlink:type="simple">isomorpanbu@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4973-5310</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сактивел</surname><given-names>Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Sakthivel</surname><given-names>R.</given-names></name></name-alternatives><bio xml:lang="en"><p>PG &amp; Research Department of Mathematics </p><p>Chennai-600 030 </p></bio><email xlink:type="simple">varshusakthi@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Pachaiyappa’s College</institution><country>India</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>165</fpage><lpage>171</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Anbarasu P., Sakthivel R., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Анбарасу П., Сактивел Р.</copyright-holder><copyright-holder xml:lang="en">Anbarasu P., Sakthivel R.</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/1756">https://nanojournal.ifmo.ru/jour/article/view/1756</self-uri><abstract><p>The oscillatory behaviour of all solutions to the second-order delay differential equation with several deviating arguments and non negative coefficients is studied. Some sufficient oscillation conditions are obtained. An example is also given to illustrate the significance of our main results.</p></abstract><trans-abstract xml:lang="ru"><p>Исследуется колебательное поведение всех решений дифференциального уравнения второго порядка с запаздыванием, имеющего несколько отклоняющихся аргументов и неотрицательных коэффициентов. Получены некоторые достаточные условия для колебаний. Приведен также пример, иллюстрирующий значимость наших основных результатов.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>второй порядок</kwd><kwd>немонотонные аргументы</kwd><kwd>уравнения с запаздыванием</kwd><kwd>колебательное решение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>second-order delay differential equation</kwd><kwd>non-monotone arguments</kwd><kwd>oscillatory solution</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">Khasanov J., Muminov S., Iskandarov S. Mathematical modelling of industrial ammonia synthesis using nonlinear reaction-diffusion equations. Nanosystems: Phys. Chem. Math., 2025, 16(6), P. 749–754.</mixed-citation><mixed-citation xml:lang="en">Khasanov J., Muminov S., Iskandarov S. Mathematical modelling of industrial ammonia synthesis using nonlinear reaction-diffusion equations. Nanosystems: Phys. Chem. 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