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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</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">10.29235/1561-8323-2024-68-4-282-287</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-1201</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>Дифференцирование результантов и общие кратные корни полиномов</article-title><trans-title-group xml:lang="en"><trans-title>Differentiation of resultants and common multiple roots of polynomials</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>Лебедев</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lebedev</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лебедев Андрей Владимирович – д-р физ.-мат. наук, профессор, заведующий кафедрой</p><p>пр. Независимости, 4, 220050, Минск</p></bio><bio xml:lang="en"><p>Lebedev Andrei V. – D. Sc. (Physics and Mathematics), Professor, Head of the Department</p><p>4, Nezavisimosti Ave., 220050, Minsk</p></bio><email xlink:type="simple">lebedev@bsu.by</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>Трубников</surname><given-names>Ю. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Trubnikov</surname><given-names>Yu. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Трубников Юрий Валентинович – д-р физ.-мат. наук, профессор</p><p>пр. Московский, 33, 210038, Витебск</p></bio><bio xml:lang="en"><p>Trubnikov Yurii V. – D. Sc. (Physics and Mathematics), Professor</p><p>33, Moskovskiy Ave., 210038, Vitebsk</p></bio><email xlink:type="simple">yurii_trubnikov@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чернявский</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Chernyavsky</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чернявский Михаил Михайлович – ст. преподаватель</p><p>пр. Московский, 33, 210038, Витебск</p></bio><bio xml:lang="en"><p>Chernyavsky Mikhail M. – Senior Lecturer</p><p>33, Moskovskiy Ave., 210038, Vitebsk</p></bio><email xlink:type="simple">misha360ff@mail.ru</email><xref ref-type="aff" rid="aff-2"/></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><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Витебский государственный университет им. П. М. Машерова</institution></aff><aff xml:lang="en"><institution>Vitebsk State University named after P. M. Masherov</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>05</day><month>09</month><year>2024</year></pub-date><volume>68</volume><issue>4</issue><fpage>282</fpage><lpage>287</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лебедев А.В., Трубников Ю.В., Чернявский М.М., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Лебедев А.В., Трубников Ю.В., Чернявский М.М.</copyright-holder><copyright-holder xml:lang="en">Lebedev A.V., Trubnikov Y.V., Chernyavsky M.M.</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://doklady.belnauka.by/jour/article/view/1201">https://doklady.belnauka.by/jour/article/view/1201</self-uri><abstract><p>Доказано, что при наличии у полиномов f и g общего корня w кратности s для f и кратности p для g разложение в ряд Тейлора для результанта R = R(f , g)(a , b) по переменным b (коэффициентам g) начинается со слагаемого порядка s, а разложение в ряд Тейлора для R = R(f , g)(a , b) по переменным a (коэффициентам f) начинается со слагаемого порядка p и для соответствующих слагаемых ряда Тейлора получены явные формулы. На этой базе доказаны идейно отличные от известных результатов утверждения, связывающие высшие производные результантов и кратные общие корни.</p></abstract><trans-abstract xml:lang="en"><p>In the article it is proven that once polynomials f and g possess a common root w of multiplicity s for f and multiplicity p for g, the Taylor series expansion for their resultant R = R (f , g)(g , b) in variables b (coefficients g) starts with the summand of order s, and the Taylor series expansion for R = R (f , g)(g , b) in variables a (coefficients f) starts with the summand of order p; and the explicit formulas for the corresponding summands of the Taylor series are obtained. Based on this, a number of results linking higher derivatives of resultants and multiple common roots of polynomials, which differ in ideas from the well-known ones, are obtained.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>корень полинома</kwd><kwd>результант</kwd><kwd>кратные корни</kwd><kwd>явные формулы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>root of a polynomial</kwd><kwd>resultant</kwd><kwd>multiple roots</kwd><kwd>exact formulas</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Белорусского республиканского фонда фундаментальных исследований (проект № Ф23М-003).</funding-statement><funding-statement xml:lang="en">The study was carried out with financial support from the Belarusian Republican Foundation for Fundamental Research (project no. Ф23М-003).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Gelfand, I. M. Discriminants, Resultants, and Multidimensional Determinants / I. M. Gelfand, M. M. Kapranov, A. V. Zelevinsky. – Boston, 1994. – 528 p.</mixed-citation><mixed-citation xml:lang="en">Gelfand I. M. Kapranov M. M., Zelevinsky A. V. Discriminants, Resultants, and Multidimensional Determinants. Boston, 1994. 528 p.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Курош, А. Г. Курс высшей алгебры: учеб. / А. Г. Курош. – 19-е изд., стереотип. – СПб., 2013. – 432 с.</mixed-citation><mixed-citation xml:lang="en">Kurosh A. G. Higher Algebra course. 19-th edition. Saint Petersburg, 2013. 432 p. (in Russian).</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
