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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Contemporary Mathematics. Fundamental Directions</journal-id><journal-title-group><journal-title xml:lang="en">Contemporary Mathematics. Fundamental Directions</journal-title><trans-title-group xml:lang="ru"><trans-title>Современная математика. Фундаментальные направления</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2413-3639</issn><issn publication-format="electronic">2949-0618</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">43904</article-id><article-id pub-id-type="doi">10.22363/2413-3639-2025-71-1-18-32</article-id><article-id pub-id-type="edn">STIIBB</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Inverse initial-boundary value problem for systems of quasilinear evolution equations of odd order</article-title><trans-title-group xml:lang="ru"><trans-title>Обратная начально-краевая задача для систем квазилинейных эволюционных уравнений нечетного порядка</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Balashov</surname><given-names>O. S.</given-names></name><name xml:lang="ru"><surname>Балашов</surname><given-names>О. С.</given-names></name></name-alternatives><email>balashovos@s1238.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Faminskii</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Фаминский</surname><given-names>А. В.</given-names></name></name-alternatives><email>faminskiy-av@pfur.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en"></institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2025</year></pub-date><volume>71</volume><issue>1</issue><issue-title xml:lang="en">Nonlocal and nonlinear problems</issue-title><issue-title xml:lang="ru">Нелокальные и нелинейные задачи</issue-title><fpage>18</fpage><lpage>32</lpage><history><date date-type="received" iso-8601-date="2025-04-21"><day>21</day><month>04</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Balashov O.S., Faminskii A.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Балашов О.С., Фаминский А.В.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Balashov O.S., Faminskii A.V.</copyright-holder><copyright-holder xml:lang="ru">Балашов О.С., Фаминский А.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/CMFD/article/view/43904">https://journals.rudn.ru/CMFD/article/view/43904</self-uri><abstract xml:lang="en"><p>An inverse initial-boundary value problem on a bounded interval for systems of quasilinear evolution equations of odd order is considered. Integral conditions are chosen as overdeterminations, and boundary functions and right-hand sides of equations of a special type are chosen as controls. Results on the existence and uniqueness of solutions for small initial data or a small time interval are established.</p></abstract><trans-abstract xml:lang="ru"><p>Рассмотрена обратная начально-краевая задача на ограниченном интервале для систем квазилинейных эволюционных уравнений нечетного порядка. В качестве переопределений выбраны интегральные условия, а в качестве управлений - краевые функции и правые части уравнений специального вида. Установлены результаты о существовании и единственности решений при малых входных данных или малом временном интервале.</p></trans-abstract><kwd-group xml:lang="en"><kwd>quasilinear evolution equations</kwd><kwd>odd order</kwd><kwd>inverse problem</kwd><kwd>initial-boundary value problem</kwd><kwd>integral conditions</kwd><kwd>existence</kwd><kwd>uniqueness</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>квазилинейные эволюционные уравнения</kwd><kwd>нечетный порядок</kwd><kwd>обратная задача</kwd><kwd>начально-краевая задача</kwd><kwd>интегральные условия</kwd><kwd>существование решения</kwd><kwd>единственность решения</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The second author was supported by a grant from the Russian Science Foundation (project No. 23-11-00056).</funding-statement><funding-statement xml:lang="ru">Второй автор был поддержан грантом Российского научного фонда (проект № 23-11-00056).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Бесов О.В., Ильин В.П., Никольский С.М. 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