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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="obituary" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</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">29426</article-id><article-id pub-id-type="doi">10.22363/2658-4670-2021-29-4-306-336</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>Personal</subject></subj-group></article-categories><title-group><article-title xml:lang="en">In Memory of Vladimir Gerdt</article-title><trans-title-group xml:lang="ru"><trans-title>Памяти Владимира Гердта</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5125-0603</contrib-id><name-alternatives><name xml:lang="en"><surname>Edneral</surname><given-names>Victor F.</given-names></name><name xml:lang="ru"><surname>Еднерал</surname><given-names>В. Ф.</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Physical and Mathematical Sciences, Senior Researcher of Skobeltsyn Institute of Nuclear Physics</p></bio><email>edneral@theory.sinp.msu.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Lomonosov Moscow State University</institution></aff><aff><institution xml:lang="ru">НИИ ядерной физики имени Д.В. Скобельцына МГУ</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN University)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-11-12" publication-format="electronic"><day>12</day><month>11</month><year>2021</year></pub-date><volume>29</volume><issue>4</issue><issue-title xml:lang="en">VOL 29, NO4 (2021)</issue-title><issue-title xml:lang="ru">ТОМ 29, №4 (2021)</issue-title><fpage>306</fpage><lpage>336</lpage><history><date date-type="received" iso-8601-date="2021-11-12"><day>12</day><month>11</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Edneral V.F.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Еднерал В.Ф.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Edneral V.F.</copyright-holder><copyright-holder xml:lang="ru">Еднерал В.Ф.</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/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/29426">https://journals.rudn.ru/miph/article/view/29426</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Center for Computational Methods in Applied Mathematics of RUDN, Professor V.P. Gerdt, whose passing was a great loss to the scientific center and the computer algebra community. The article provides biographical information about V.P. Gerdt, talks about his contribution to the development of computer algebra in Russia and the world. At the end there are the author’s personal memories of V.P. Gerdt.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Настоящая статья - мемориальная, она посвящена памяти руководителя научного центра вычислительных методов в прикладной математике РУДН, профессора В.П. Гердта, чей уход стал невосполнимой потерей для научного центра и всего сообщества компьютерной алгебры. В статье приведены биографические сведения о В.П. Гердте, рассказано о его вкладе в развитие компьютерной алгебры в России и мире. В конце приведены личные воспоминания автора о В.П. Гердте.</p></trans-abstract><kwd-group xml:lang="en"><kwd>computer algebra</kwd><kwd>quantum computing</kwd><kwd>mimetic methods</kwd><kwd>polynomial computer algebra methods</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>компьютерная алгебра</kwd><kwd>квантовые вычисления</kwd><kwd>миметические методы</kwd><kwd>методы полиномиальной компьютерной алгебры</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>C. Riquier, Les Systèmes d’Equations aux Dérivées Partielles. Paris: Gauthier-Villars, 1910.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>M. Janet, “Systèmes d’équations aux dérivées partielles,” Journals de mathématiques, 8e série, vol. 3, pp. 65-151, 1920.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>J. Thomas, Differential systems. New York: American Mathematical Society, 1937.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>D. 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