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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">10.22405/2226-8383-2025-26-1-243-257</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1950</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>75-летие профессора Урусби Мухамедовича Пачева</article-title><trans-title-group xml:lang="en"><trans-title>75-th Anniversary of Professor Urusbi Mukhamedovich Pachev</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>Быковский</surname><given-names>Виктор Алексеевич</given-names></name><name name-style="western" xml:lang="en"><surname>Bykovskii</surname><given-names>Viktor Alekseevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, член-корреспондент РАН</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences, corresponding member of the Russian Academy of Sciences</p></bio><email xlink:type="simple">Bykovskyva@tolstovsky.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>Чирский</surname><given-names>Владимир Григорьевич</given-names></name><name name-style="western" xml:lang="en"><surname>Chirskii</surname><given-names>Vladimir Grigorievich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, профессор</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences, professor</p></bio><email xlink:type="simple">vgchirskii@yandex.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>Чубариков</surname><given-names>Владимир Николаевич</given-names></name><name name-style="western" xml:lang="en"><surname>Chubarikov</surname><given-names>Vladimir Nikolaevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, профессор</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences, professor</p></bio><email xlink:type="simple">chubarik2020@mail.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Добровольский</surname><given-names>Николай Михайлович</given-names></name><name name-style="western" xml:lang="en"><surname>Dobrovolskiy</surname><given-names>Nikolay Mikhailovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, профессор</p></bio><bio xml:lang="en"><p>doctor of physical and mathematical sciences,professor</p></bio><email xlink:type="simple">dobrovol@tsput.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>Добровольский</surname><given-names>Николай Николаевич</given-names></name><name name-style="western" xml:lang="en"><surname>Dobrovolsky</surname><given-names>Nikolay Nikolaevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук</p></bio><bio xml:lang="en"><p>candidate of physical-mathematical sciences</p></bio><email xlink:type="simple">nikolai.dobrovolsky@gmail.com</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>Реброва</surname><given-names>Ирина Юрьевна</given-names></name><name name-style="western" xml:lang="en"><surname>Rebrova</surname><given-names>Irina Yuryevna</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">i_rebrova@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>Дохов</surname><given-names>Резуан Ауесович</given-names></name><name name-style="western" xml:lang="en"><surname>Dokhov</surname><given-names>Rezuan Auesovich</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">rezuan.dokhov@yandex.ru</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тульский государственный педагогический университет им. Л. Н. Толстого</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tula State Lev Tolstoy Pedagogical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Московский государственный университет имени М. В. Ломоносова, РАНХиГС</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University, RANEPA</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Московский государственный университет имени М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Северо-Кавказский центр математических исследований</institution><country>Россия</country></aff><aff xml:lang="en"><institution>North–Caucasus Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>22</day><month>06</month><year>2025</year></pub-date><volume>26</volume><issue>1</issue><fpage>243</fpage><lpage>258</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Быковский В.А., Чирский В.Г., Чубариков В.Н., Добровольский Н.М., Добровольский Н.Н., Реброва И.Ю., Дохов Р.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Быковский В.А., Чирский В.Г., Чубариков В.Н., Добровольский Н.М., Добровольский Н.Н., Реброва И.Ю., Дохов Р.А.</copyright-holder><copyright-holder xml:lang="en">Bykovskii V.A., Chirskii V.G., Chubarikov V.N., Dobrovolskiy N.M., Dobrovolsky N.N., Rebrova I.Y., Dokhov R.A.</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/1950">https://www.chebsbornik.ru/jour/article/view/1950</self-uri><abstract><p>В данной статье рассматривается научная и педагогическая деятельность профессора, доктора физико-математических наук Урусби Мухамедовича Пачева, внесшего значительный вклад в исследования по аналитической теории чисел и геометрии чисел. Освещаются основные периоды жизни известного ученого.У. М. Пачев продолжительное время работает в Кабардино-Балкарском государственном университете им. Х. М. Бербекова, руководит научным семинаром по теории чисел.Продолжая дело профессора А. В. Малышева, являлся научным руководителем четырёх аспирантов по кандидатским диссертациям.</p></abstract><trans-abstract xml:lang="en"><p>This article examines the scientific and pedagogical activities of Professor, Doctor of Physical and Mathematical Sciences Urusbi Mukhamedovich Pachev, who made a significant contribution to research on analytical number theory and geometry of numbers. The main periods of the famous scientist’s life are covered.U. M. Pachev has been working for a long time at the Kabardino-Balkarian State University named after Kh. M. Berbekov, and heads a scientific seminar on number theory.Continuing the work of Professor A. V. Malyshev, he was the scientific supervisor of four postgraduate students on candidate dissertations.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>дискретный эргодический метод</kwd><kwd>представление чисел квадратичными формами</kwd><kwd>гипотеза Минковского.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>discrete ergodic method</kwd><kwd>representation of numbers by quadratic forms</kwd><kwd>Minkowski hypothesis.</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">Венков Б. А. Об арифметике кватернионов. Пятое сообщение // Известия Академии наук</mixed-citation><mixed-citation xml:lang="en">Venkov B. A., 1929, “On the Arithmetic of Quaternions. Fifth Communication,” Bulletin of the</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">СССР. VII серия. 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