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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">10.22405/2226-8383-2024-25-5-45-56</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1869</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><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Article</subject></subj-group></article-categories><title-group><article-title>О свойстве антинормальности двупорожденных подгрупп свободной группы</article-title><trans-title-group xml:lang="en"><trans-title>On the property of antinormality of two-born subgroups of a free group</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>Безверхняя</surname><given-names>Наталия Борисовна</given-names></name><name name-style="western" xml:lang="en"><surname>Bezverhnaya</surname><given-names>Natalia Borisovna</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">vnbezv@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский технический университет связи и информатики</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow Technical University of Communication and Informatics</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>20</day><month>01</month><year>2025</year></pub-date><volume>25</volume><issue>5</issue><fpage>45</fpage><lpage>56</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Безверхняя Н.Б., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Безверхняя Н.Б.</copyright-holder><copyright-holder xml:lang="en">Bezverhnaya N.B.</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/1869">https://www.chebsbornik.ru/jour/article/view/1869</self-uri><abstract><p>Вопрос об изучении свойства антинормальности подгрупп является важным, так как это свойство используется при изучении различных свойств групп (например, гиперболичности групп) и различных алгоритмических проблем в группах.В предлагаемой статье дано полное описание всех антинормальных двупорожденных подгрупп со определенным условием, налагаемым на образующие данной подгруппы, содержащиеся в свободной группе ранга больше единицы.</p></abstract><trans-abstract xml:lang="en"><p>The question of studying the property of antinormality of subgroups is important, sincethis property is used in the study of various properties of groups (for example, hyperbolicity of groups) and various algorithmic problems in groups.The proposed article gives a complete description of all antinormal two-generated subgroups with a certain condition imposed on the generators of this subgroup contained in a free group of rank greater than one.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>свободные группы</kwd><kwd>антинормальность подгрупп</kwd><kwd>алгоритмические проблемы.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>free groups</kwd><kwd>antinormality of subgroups</kwd><kwd>algorithmic problems.</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">Линдон, Р., Шупп, П. 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