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<article article-type="conference-paper" 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">matatecs</journal-id><journal-title-group><journal-title xml:lang="ru">Математика и теоретические компьютерные науки</journal-title><trans-title-group xml:lang="en"><trans-title>Mathematics and Theoretical Computer Science</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2949-3919</issn><publisher><publisher-name>Казанский (Приволжский) федеральный университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26907/2949-3919.2025.1.64-77</article-id><article-id custom-type="elpub" pub-id-type="custom">matatecs-71</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>СТАТЬИ</subject></subj-group></article-categories><title-group><article-title>Классы Леви квазимногообразий 2-нильпотентных групп</article-title><trans-title-group xml:lang="en"><trans-title>Levi classes of quasivarieties of 2-nilpotent groups</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>Шахова</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shakhova</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Светлана Александровна Шахова</p><p>пр. Ленина, д. 61, г. Барнаул, 656049</p></bio><bio xml:lang="en"><p>Svetlana Aleksandrovna Shakhova</p><p>61 Lenina av., Barnaul 656049</p></bio><email xlink:type="simple">ssa@math.asu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Алтайский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Altai State 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>02</day><month>05</month><year>2025</year></pub-date><volume>3</volume><issue>1</issue><issue-title>Специальный выпуск трудов конференции «Алгебра и математическая логика: теория и приложения»</issue-title><fpage>64</fpage><lpage>77</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шахова С.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Шахова С.А.</copyright-holder><copyright-holder xml:lang="en">Shakhova S.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://matatecs.elpub.ru/jour/article/view/71">https://matatecs.elpub.ru/jour/article/view/71</self-uri><abstract><p>Классом Леви L(M), порожденным классом групп M, называется класс всех групп, в которых нормальное замыкание каждой циклической подгруппы принадлежит M. Пусть p – простое число, p ̸= 2, s – натуральное число, s ≥ 2, и s &gt; 2 при p = 3; Hps – свободная ранга 2 группа в многообразии нильпотентных ступени ≤ 2 групп экспоненты ps с коммутантом экспоненты p; Z – бесконечная циклическая группа; q{Hps , Z} – квазимногообразие, порожденное множеством групп {Hps , Z}. В работе найден базис квазитождеств класса Леви L(q{Hps , Z}) и установлено, что существует континуальное множество квазимногообразий K таких, что L(K) = L(q{Hps , Z}).</p></abstract><trans-abstract xml:lang="en"><p>The Levi class L(M) generated by the class of groups M is the class of all groups in which the normal closure of each cyclic subgroup belongs to M.</p><p>Let p be a prime number, p ̸= 2, s be a natural number, s ≥ 2, and s &gt; 2 for p = 3; Hps be a free group of rank 2 in the variety of nilpotent groups of class ≤ 2 of exponent ps with commutator subgroup of exponent p; Z is an inﬁnite cyclic group; q{Hps , Z} is a quasivariety generated by the set of groups {Hps , Z}. We ﬁnd a basis of quasi-identities of the Levi class L(q{Hps , Z}) and establish that there exists a continuous set of quasivarieties K such that L(K) = L(q{Hps , Z}).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>квазимногообразие</kwd><kwd>класс Леви</kwd><kwd>нильпотентная группа</kwd></kwd-group><kwd-group xml:lang="en"><kwd>quasivariety</kwd><kwd>Levi class</kwd><kwd>nilpotent group</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">F.W. Levi, Groups in which the commutator operation satisﬁes certain algebraic conditions, J. Indian Math. Soc. (N.S.) 6, 87–97 (1942).</mixed-citation><mixed-citation xml:lang="en">F.W. Levi, Groups in which the commutator operation satisﬁes certain algebraic conditions, J. Indian Math. Soc. 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