<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">10.29235/1561-8323-2025-69-5-359-366</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-1269</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>Минимальные τ-замкнутые σ-локальные не H-формации конечных групп</article-title><trans-title-group xml:lang="en"><trans-title>Minimal τ-closed σ-local non-H­formation 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/0000-0001-6896-7208</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 – канд. физ.-мат. наук, доцент.</p><p>Пр-т Независимости, 4, 220030, Минск</p></bio><bio xml:lang="en"><p>Safonova Inna N. – 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-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Скрундь</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Skrundz</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Скрундь Валентина Викторовна – аспирант.</p><p>Пр-т Независимости, 4, 220030, Минск</p></bio><bio xml:lang="en"><p>Skrundz Valentina V. – Postgraduate Student.</p><p>4, Nezavisimosti Ave., 220030, Minsk</p></bio><email xlink:type="simple">vallik@mail.ru</email><xref ref-type="aff" rid="aff-1"/></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><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>06</day><month>11</month><year>2025</year></pub-date><volume>69</volume><issue>5</issue><fpage>359</fpage><lpage>366</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Сафонова И.Н., Скрундь В.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Сафонова И.Н., Скрундь В.В.</copyright-holder><copyright-holder xml:lang="en">Safonova I.N., Skrundz V.V.</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/1269">https://doklady.belnauka.by/jour/article/view/1269</self-uri><abstract><p>Получено описание минимальных τ-замкнутых σ-локальных не H-формаций для произвольной σ-локальной формации H классического типа, т. е. σ-локальной формации, которая имеет такое σ-локальное определение, все неабелевы значения которого σ-локальные формации. Данный результат дает решение задачи Л. А. Шеметкова (1980 г.) об описании критических формаций в классе τ-замкнутых σ-локальных формаций, где σ – некоторое разбиение множества всех простых чисел, τ – произвольный подгрупповой функтор.</p><p>(Представлено академиком Н. А. Изобовым)</p></abstract><trans-abstract xml:lang="en"><p>A description of minimal τ-closed σ-local non-H-formations is obtained for an arbitrary σ-local formation H of classical type, i. e., a σ-local formation that has such a σ-local definition, all non-abelian values of which are σ-local formations. This result provides a solution to L. A. Shemetkov’s problem (1980) on describing critical formations in the class of τ-closed σ-local formations, where σ is some partition of the set of all prime numbers, τ is an arbitrary subgroup functor.</p><p>(Communicated by Academician Nikolay A. Izobov)</p></trans-abstract><kwd-group xml:lang="ru"><kwd>конечная группа</kwd><kwd>формационная σ-функция</kwd><kwd>σ-локальная формация</kwd><kwd>подгрупповой функтор</kwd><kwd>τ-замкнутая формация</kwd><kwd>критическая σ-локальная формация</kwd><kwd>формация классического типа</kwd></kwd-group><kwd-group xml:lang="en"><kwd>finite group</kwd><kwd>formation σ-function</kwd><kwd>σ-local formation</kwd><kwd>subgroup functor</kwd><kwd>τ-closed formation</kwd><kwd>critical σ-local formation</kwd><kwd>formation of classical type</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследования поддержаны Министерством образования Республики Беларусь (проект № 20211328)</funding-statement><funding-statement xml:lang="en">Research was supported by the Ministry of Education of the Republic of Belarus (project no. 20211328)</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. А. Экраны ступенчатых формаций / Л. А. Шеметков // Труды VI Всесоюзного симпозиума по теории групп. – Киев, 1980. – С. 37–50.</mixed-citation><mixed-citation xml:lang="en">Shemetkov L. A. Screens of step formations. Trudy VI Vsesoyuznogo simpoziuma po teorii grupp [Proceedings of the VI All-Union Symposium on Group Theory]. Kyiv, 1980, рр. 37–50 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Скиба, А. Н. О критических формациях / А. Н. Скиба // Известия АН БССР. Серия физико-математических наук. – 1980. – № 4. – С. 27–33.</mixed-citation><mixed-citation xml:lang="en">Skiba A. N. On critical formations. Izvestiya AN BSSR, 1980, no. 4, рр. 27–33 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Скиба, А. Н. О критических формациях / А. Н. Скиба // Бесконечные группы и примыкающие алгебраические структуры. – Киев, 1993. – С. 258–268.</mixed-citation><mixed-citation xml:lang="en">Skiba A. N. On critical formations. Beskonechnye gruppy i primykayushchie algebraicheskie struktury [Infinite Groups and Adjoining Algebraic Structures]. Kyiv, 1993, рр. 258–268 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Шеметков, Л. А. Формации алгебраических систем / Л. А. Шеметков, А. Н. Скиба. – М., 1989. – 257 с.</mixed-citation><mixed-citation xml:lang="en">Shemetkov L. A., Skiba A. N. Formations of Algebraic Systems. Moscow, 1989. 257 р. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Скиба, А. Н. Алгебра формаций / А. Н. Скиба. – Мн., 1997. – 239 с.</mixed-citation><mixed-citation xml:lang="en">Skiba A. N. Algebra of Formations. Minsk, 1997. 239 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Сафонова, И. Н. О минимальных σ-локальных не H-формациях конечных групп / И. Н. Сафонова // Проблемы физики, математики и техники. – 2020. – № 4 (45). – С. 105–112.</mixed-citation><mixed-citation xml:lang="en">Safonova I. N. On minimal σ-local non-H-formations of finite groups. Problemy fiziki, matematiki i tekhniki = Problems of Physics, Mathematics and Technology, 2020, no. 4 (45), pp. 105–112 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Сафонова, И. Н. О критических σ-локальных формациях конечных групп / И. Н. Сафонова // Труды Института математики. – 2023. – Т. 31, № 2. – С. 63–80.</mixed-citation><mixed-citation xml:lang="en">Safonova I. N. On critical σ-local formations of finite groups. Trudy Instituta Matematiki = Proceedings of the Institute of Mathematics, 2023, vol. 31, no. 2, pp. 63–80 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Сафонова, И. Н. К теории Hστ -критических формаций конечных групп / И. Н. Сафонова, В. В. Скрундь // Международная конференция «Алгебра и динамические системы», посвященная 90-летию со дня рождения В. А. Белоногова, Нальчик, 3–7 июня 2025 г. – Нальчик, 2025. – С. 137–140.</mixed-citation><mixed-citation xml:lang="en">Safonova I. N., Skrund V. V. On the theory of Hστ -critical formations of finite groups. Mezhdunarodnaya konferent siya “Algebra i dinamicheskie sistemy”, posvyashchennaya 90-letiyu so dnya rozhdeniya V. A. Belonogova, Nal’chik, 3–7 iyunya 2025 g. [International Conference “Algebra and Dynamical Systems” dedicated to the 90th anniversary of V. A. Belonogov, Nalchik, 3–7 June 2025]. Nalchik, 2025, pp. 137–140 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Сафонова, И. Н. О Hστ -критических формациях конечных групп / И. Н. Сафонова, В. В. Скрундь // Проблемы физики, математики и техники. – 2025. – № 3 (64). – С. 99–111.</mixed-citation><mixed-citation xml:lang="en">Safonova I. N., Skrundz V. V. Оn Hστ -critical formations of finite groups. Problemy fiziki, matematiki i tekhniki = Problems of Physics, Mathematics and Technology, 2025, no. 3 (64), рр. 99–111 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Skiba, A. N. On σ-subnormal and σ-permutable subgroups of finite groups / A. N. Skiba // Journal of Algebra. – 2015. – Vol. 436. – P. 1–16. https://doi.org/10.1016/j.jalgebra.2015.04.010</mixed-citation><mixed-citation xml:lang="en">Skiba A. N. On σ-subnormal and σ-permutable subgroups of finite groups. Journal of Algebra, 2015, vol. 436, pp. 1–16. https://doi.org/10.1016/j.jalgebra.2015.04.010</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Скиба, А. Н. Об одном обобщении локальных формаций / А. Н. Скиба // Проблемы физики, математики и техники. – 2018. – № 1 (34). – С. 79–82.</mixed-citation><mixed-citation xml:lang="en">Skiba A. N. On one generalization of the local formations. Problemy fiziki, matematiki i tekhniki = Problems of Physics, Mathematics and Technology, 2018, no. 1 (34), pp. 79–82 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Chi, Z. On n-multiply σ-local formations of finite groups / Z. Chi, V. G. Safonov, A. N. Skiba // Communications in Algebra. – 2019. – Vol. 47, N 3. – P. 957–968. https://doi.org/10.1080/00927872.2018.1498875</mixed-citation><mixed-citation xml:lang="en">Chi Z., Safonov V. G., Skiba A. N. On n-multiply σ-local formations of finite groups. Communications in Algebra, 2019, vol. 47, no. 3, pp. 957–968. https://doi.org/10.1080/00927872.2018.1498875</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Safonova, I. N. Some properties of n-multiply σ-local formations of finite groups / I. N. Safonova // Asian-European Journal of Mathematics. – 2022. – Vol. 15, N 7. – Art. 2250138 (12 p.). https://doi.org/10.1142/s1793557122501388</mixed-citation><mixed-citation xml:lang="en">Safonova I. N. Some properties of n-multiply σ-local formations of finite groups. Asian-European Journal of Mathematics, 2022, vol. 15, no. 7, art. 2250138 (12 p). https://doi.org/10.1142/s1793557122501388</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Safonova, I. N. On the τ-closedness of n-multiply σ-local formation / I. N. Safonova // Advances in Group Theory and Applications. – 2024. – Vol. 18. – P. 123–136.</mixed-citation><mixed-citation xml:lang="en">Safonova I. N. On the τ-closedness of n-multiply σ-local formation. Advances in Group Theory and Applications, 2024, vol. 18, pp. 123–136.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Сафонова, И. Н. О n-кратной σ-локальности непустой τ-замкнутой формации конечных групп / И. Н. Сафонова // Труды Института математики НАН Беларуси. – 2024. – Т. 32, № 1. – С. 31–37.</mixed-citation><mixed-citation xml:lang="en">Safonova I. N. Оn n-multiple σ-locality of a non-empty τ-closed formation of finite groups. Trudy Instituta Matematiki NAN Belarusi = Proceedings of the Institute of Mathematics of the NAS of Belarus, 2024, vol. 32, no. 1, pp. 32–38 (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>
