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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">mathnas</journal-id><journal-title-group><journal-title xml:lang="ru">Труды Института математики НАН Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Institute of Mathematics of the NAS of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1812-5093</issn><publisher><publisher-name>Институт математики НАН Беларуси</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.67268/1812-5093-2026-34-1s-167-171</article-id><article-id custom-type="edn" pub-id-type="custom">KFEKAM</article-id><article-id custom-type="elpub" pub-id-type="custom">mathnas-194</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>ДИФФЕРЕНЦИАЛЬНЫЕ УРАВНЕНИЯ, ДИНАМИЧЕСКИЕ СИСТЕМЫ И ОПТИМАЛЬНОЕ УПРАВЛЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>DIFFERENTIAL EQUATIONS, DYNAMIC SYSTEMS AND OPTIMAL CONTROL</subject></subj-group></article-categories><title-group><article-title>Аналитические свойства решений трехмерной динамической системы с кубическими нелинейностями</article-title><trans-title-group xml:lang="en"><trans-title>Analytical properties of solutions of three-dimensional dynamical system with cubic nonlinearities</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>Цегельник</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsegel’nik</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">tsegvv@bsuir.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет информатики и радиоэлектроники</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Belarusian State University of Informatics and Radioelectronics</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>07</day><month>11</month><year>2026</year></pub-date><volume>34</volume><issue>1s</issue><fpage>167</fpage><lpage>171</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Цегельник В.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Цегельник В.В.</copyright-holder><copyright-holder xml:lang="en">Tsegel’nik V.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://mathnas.ejournal.by/jour/article/view/194">https://mathnas.ejournal.by/jour/article/view/194</self-uri><abstract><p>Исследованы аналитические свойства решений обобщенной системы Рабиновича–Фабриканта, связанной с моделями нелинейной физики и обладающей определенными качественными свойствами при значениях входящих в нее параметров.</p></abstract><trans-abstract xml:lang="en"><p>The analytical properties of solutions of the generalized Rabinovich–Fabrikant system related to models of nonlinear physics and possessing certain qualitative properties at the values of its parameters are investigated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>первый интеграл</kwd><kwd>обобщенная система Рабиновича–Фабриканта</kwd><kwd>тест Пенлеве</kwd><kwd>хаотическое поведение</kwd></kwd-group><kwd-group xml:lang="en"><kwd>first integral</kwd><kwd>generalized Rabinovich–Fabrikant system</kwd><kwd>Painlev\'e test</kwd><kwd>chaotic behavior</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">Кузнецов С. 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