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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">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</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">10.29235/1561-2430-2025-61-4-271-287</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-861</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>О σ-локальных классах конечных групп</article-title><trans-title-group xml:lang="en"><trans-title>On σ-local classes of finite groups</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0682-3107</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сафонов</surname><given-names>В. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Safonov</surname><given-names>V. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сафонов Василий Григорьевич – доктор физико-математических наук, профессор</p><p>ул. Сур­ганова, 11, 220072, Минск </p></bio><bio xml:lang="en"><p>Vasily G. Safonov – Dr. Sc. (Physics and Mathematics), Professor</p><p>11, Surganov Str., 220072, Minsk </p></bio><email xlink:type="simple">vgsafonov@im.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6896-7208</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сафонова</surname><given-names>И. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Safonova</surname><given-names>I. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сафонова Инна Николаевна – кандидат физико-математических наук, доцент</p><p>пр. Независимости, 4, 220030, Минск </p></bio><bio xml:lang="en"><p>Inna N. Safonova – Ph. D. (Physics and Mathematics), Associate Professor</p><p>4, Nezavisimosti Ave., 220030, Minsk</p></bio><email xlink:type="simple">in.safonova@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт математики Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution></aff><aff xml:lang="en"><institution>Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>06</day><month>01</month><year>2026</year></pub-date><volume>61</volume><issue>4</issue><fpage>271</fpage><lpage>287</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сафонов В.Г., Сафонова И.Н., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Сафонов В.Г., Сафонова И.Н.</copyright-holder><copyright-holder xml:lang="en">Safonov V.G., Safonova I.N.</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://vestifm.belnauka.by/jour/article/view/861">https://vestifm.belnauka.by/jour/article/view/861</self-uri><abstract><p>Для различных разбиений множества P всех простых чисел исследуются свойства обобщенно локальных классов (формаций, классов Фиттинга) конечных групп. Доказаны критерии σ-локальности α-локального класса групп, где σ и α – некоторые различные разбиения множества P. Изучены свойства произведений обобщенно локальных классов, а также их алгебр. Для σ-разрешимого σ-локального класса получены достаточные условия коммутативности порожденной им σ-алгебры.</p></abstract><trans-abstract xml:lang="en"><p>For various partitions of the set P of all prime numbers, properties of generalized local classes (formations, Fitting classes) of finite groups are investigated. Criteria for σ-locality of an α-local class of groups are proved, where σ and α are some distinct partitions of P. Properties of products of generalized local classes, as well as their algebras, are studied. For a σ-soluble σ-local class, sufficient conditions for the commutativity of the σ-algebra generated by it are obtained.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>конечная группа</kwd><kwd>σ-локальная формация</kwd><kwd>σ-локальный класс Фиттинга</kwd><kwd>σ-алгебра формаций</kwd><kwd>σ-алгебра классов Фиттинга</kwd><kwd>полугруппа классов групп</kwd></kwd-group><kwd-group xml:lang="en"><kwd>finite group</kwd><kwd>σ-local formation</kwd><kwd>σ-local Fitting class</kwd><kwd>σ-algebra of formations</kwd><kwd>σ-algebra of Fitting classes</kwd><kwd>semigroup of classes of groups</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследования выполнены при финансовой поддержке Белорусского республиканского фонда фундаментальных исследований (проект № Ф23РНФ-237).</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">Шеметков, Л. A. 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