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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">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2023-24-2-266-275</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1546</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>Краткие сообщения</subject></subj-group></article-categories><title-group><article-title>Интегрирование уравнения КдФ отрицательного порядка со свободным членом в классе периодических функций</article-title><trans-title-group xml:lang="en"><trans-title>Integration of the KdV equation of negative order with a free term in the class of periodic functions</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>Хасанов</surname><given-names>Музаффар Машарипович</given-names></name><name name-style="western" xml:lang="en"><surname>Khasanov</surname><given-names>Muzaffar Maksharipovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук</p></bio><bio xml:lang="en"><p>candidate of physical and mathematical sciences</p></bio><email xlink:type="simple">hmuzaffar@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Рахимов</surname><given-names>Илхом Давронбекович</given-names></name><name name-style="western" xml:lang="en"><surname>Rakhimov</surname><given-names>Ilkhom Davronbekovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант</p></bio><bio xml:lang="en"><p>postgraduate student</p></bio><email xlink:type="simple">ilxom@urdu.uz</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ургенчский государственный университет</institution><country>Узбекистан</country></aff><aff xml:lang="en"><institution>Urganch State University</institution><country>Uzbekistan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>31</day><month>10</month><year>2023</year></pub-date><volume>24</volume><issue>2</issue><fpage>266</fpage><lpage>275</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хасанов М.М., Рахимов И.Д., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Хасанов М.М., Рахимов И.Д.</copyright-holder><copyright-holder xml:lang="en">Khasanov M.M., Rakhimov I.D.</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://www.chebsbornik.ru/jour/article/view/1546">https://www.chebsbornik.ru/jour/article/view/1546</self-uri><abstract><p>В данной работе рассматривается уравнение КдФ отрицательного порядка со свободным членом в классе периодических функций. Показано, что уравнение КдФ отрицательного порядка со свободным членом в классе периодических функций может быть проинтегрировано методом обратной спектральной задачи. Определена эволюция спектральных данных оператора Штурма-Лиувилля с периодическим потенциалом, связанного с решени-ем уравнение КдФ отрицательного порядка со свободным членом в классе периодических функций. Полученные результаты позволяют применить метод обратной задачи для решения уравнение КдФ отрицательного порядка со свободным членом в классе периодических функций.</p></abstract><trans-abstract xml:lang="en"><p>In this paper, we consider the KdV equation of negative order with a free term in the class of periodic functions. It is shown that the KdV equation of negative order with a free term in the class of periodic functions can be integrated by the method of the inverse spectral problem.The evolution of the spectral data of the Sturm-Liouville operator with a periodic potential associated with the solution of a negative-order KdV equation with a free term in the class of periodic functions is determined. The results obtained make it possible to apply the inverseproblem method to the solution of the KdV equation of negative order with a free term in the class of periodic functions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>КдФ отрицательного порядка</kwd><kwd>самосогласованный источник</kwd><kwd>обратная спектральная задача</kwd><kwd>система уравнений Дубровина - Трубовица.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>KdV of negative order</kwd><kwd>self-consistent source</kwd><kwd>inverse spectral problem</kwd><kwd>Dubrovin - Trubovits system of equations.</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">Gardner C.S., Greene J.M., Kruskal M.D., Miura R.M. Method for solving the Korteweg-de Vries equation // Phys. Rev. Lett.. 1967. Vol. 19, № 19, P. 1095-1097.</mixed-citation><mixed-citation xml:lang="en">Gardner C.S. 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