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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">10.22405/2226-8383-2025-26-1-258-262</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1951</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>Памятные даты</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Memorable dates</subject></subj-group></article-categories><title-group><article-title>Валерий Иванович Иванов (7.07.1951 — 2.03.2025)</article-title><trans-title-group xml:lang="en"><trans-title>Valery Ivanovich Ivanov (7.07.1951 — 2.03.2025)</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>Кашин</surname><given-names>Б. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Kashin</surname><given-names>B. S.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Конягин</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Konyagin</surname><given-names>S. V.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Темляков</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Temlyakov</surname><given-names>V. N.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чубариков</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Chubarikov</surname><given-names>V. N.</given-names></name></name-alternatives><email xlink:type="simple">chubarik2020@mail.ru</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Толоконников</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tolokonnikov</surname><given-names>L. A.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Добровольский</surname><given-names>Н. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Dobrovolskii</surname><given-names>N. N.</given-names></name></name-alternatives><email xlink:type="simple">nikolai.dobrovolsky@gmail.com</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кочетыгов</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kochetygov</surname><given-names>A. A.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Буркин</surname><given-names>И. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Burkin</surname><given-names>I. M.</given-names></name></name-alternatives><email xlink:type="simple">i-burkin@yandex.ru</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Баранов</surname><given-names>В. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Baranov</surname><given-names>V. P.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Скобельцин</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Skobeltsin</surname><given-names>S. A.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ларкин</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Larkin</surname><given-names>N. V.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Горбачёв</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorbachev</surname><given-names>D. V.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Смирнов</surname><given-names>О. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnov</surname><given-names>O. I.</given-names></name></name-alternatives></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Добровольский</surname><given-names>Н. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Dobrovolskii</surname><given-names>N. M.</given-names></name></name-alternatives><email xlink:type="simple">dobrovol@tsput.ru</email></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Реброва</surname><given-names>И. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Rebrova</surname><given-names>I. Yu.</given-names></name></name-alternatives><email xlink:type="simple">i_rebrova@mail.ru</email></contrib></contrib-group><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>27</day><month>06</month><year>2025</year></pub-date><volume>26</volume><issue>1</issue><fpage>258</fpage><lpage>262</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кашин Б.С., Конягин С.В., Темляков В.Н., Чубариков В.Н., Толоконников Л.А., Добровольский Н.Н., Кочетыгов А.А., Буркин И.М., Баранов В.П., Скобельцин С.А., Ларкин Н.В., Горбачёв Д.В., Смирнов О.И., Добровольский Н.М., Реброва И.Ю., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Кашин Б.С., Конягин С.В., Темляков В.Н., Чубариков В.Н., Толоконников Л.А., Добровольский Н.Н., Кочетыгов А.А., Буркин И.М., Баранов В.П., Скобельцин С.А., Ларкин Н.В., Горбачёв Д.В., Смирнов О.И., Добровольский Н.М., Реброва И.Ю.</copyright-holder><copyright-holder xml:lang="en">Kashin B.S., Konyagin S.V., Temlyakov V.N., Chubarikov V.N., Tolokonnikov L.A., Dobrovolskii N.N., Kochetygov A.A., Burkin I.M., Baranov V.P., Skobeltsin S.A., Larkin N.V., Gorbachev D.V., Smirnov O.I., Dobrovolskii N.M., Rebrova I.Y.</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/1951">https://www.chebsbornik.ru/jour/article/view/1951</self-uri><abstract><p>-</p></abstract><trans-abstract xml:lang="en"><p>-</p></trans-abstract><kwd-group xml:lang="ru"><kwd>-</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">-</mixed-citation><mixed-citation xml:lang="en">-</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>
