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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">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-2430-2024-60-3-195-202</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-794</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>МАТЕМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICS</subject></subj-group></article-categories><title-group><article-title>О преобразованиях Беклунда стационарных уравнений иерархии второго уравнения Пенлеве</article-title><trans-title-group xml:lang="en"><trans-title>On Bäcklund transformations to stationary equations in hierarchy of the second Painlevé equation</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>Громак</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Gromak</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Громак Валерий Иванович – доктор физико-математических наук, профессор, кафедра дифференциальных уравнений и системного анализа</p><p>пр. Независимости, 4, 220030, Минск</p></bio><bio xml:lang="en"><p>Valery I. Gromak – Dr. Sc. (Physics and Mathematics), Professor, Department of Differential Equations and Systems Analysis</p><p>4, Nezavisimosti Ave., 220030, Minsk</p></bio><email xlink:type="simple">vgromak@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution></aff><aff xml:lang="en"><institution>Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>05</day><month>10</month><year>2024</year></pub-date><volume>60</volume><issue>3</issue><fpage>195</fpage><lpage>202</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Громак В.И., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Громак В.И.</copyright-holder><copyright-holder xml:lang="en">Gromak V.I.</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://vestifm.belnauka.by/jour/article/view/794">https://vestifm.belnauka.by/jour/article/view/794</self-uri><abstract><p>Рассматриваются аналитические свойства решений первых трех стационарных уравнений иерархии второго уравнения Пенлеве. Для уравнения второго порядка показано, что преобразование Беклунда в общем случае определяет формулу теоремы сложения для эллиптической функции Вейерштрасса. Для уравнений четвертого и шестого порядка построено преобразование Беклунда и специальные классы решений. Установлено, что при некотором соотношении между параметрами множество решений первого члена стационарной иерархии является подмножеством множества решений второго члена, а множество решений второго члена иерархии вкладывается во множество решений уравнения шестого порядка стационарной иерархии второго уравнения Пенлеве.</p></abstract><trans-abstract xml:lang="en"><p>The analytical properties of solutions to stationary equations of the second and fourth orders in the hierarchy of the second Painlevé equation are considered. For the second-order equation, it is shown that the Bäcklund transformation in the general case determines the formula of the addition theorem for the Weierstrass elliptic function. For the fourth and sixth-order equations, Bäcklund transformations and special classes of solutions are constructed. It has been established that, for a certain relationship between the parameters, the set of solutions to the first term of the stationary hierarchy is a subset of solutions to the second term and the set of solutions to the second term of the hierarchy is a subset of solutions of the six-order equation of the stationary hierarchy of the second Painlevé equation.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>уравнения Пенлеве</kwd><kwd>преобразование Беклунда</kwd><kwd>эллиптическая функция Вейерштрасса</kwd><kwd>теорема сложения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Painlevé equations</kwd><kwd>Bäcklund transformation</kwd><kwd>Weierstrass elliptic function</kwd><kwd>addition theorem</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">Rogers, C. 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