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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">10.22405/2226-8383-2023-24-1-15-26</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1470</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>Конгруэнции свободного унара</article-title><trans-title-group xml:lang="en"><trans-title>Congruences of a free unar</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>Будиянская</surname><given-names>Кристина Викторовна</given-names></name><name name-style="western" xml:lang="en"><surname>Budianskaia</surname><given-names>Cristina Viktorovna</given-names></name></name-alternatives><email xlink:type="simple">budianskayak@yandex.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>Кожухов</surname><given-names>Игорь Борисович</given-names></name><name name-style="western" xml:lang="en"><surname>Kozhukhov</surname><given-names>Igor Borisovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>профессор, доктор физико-математических наук</p></bio><bio xml:lang="en"><p>professor, doctor of physical and mathematical sciences</p></bio><email xlink:type="simple">kozhuhov_i_b@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ООО «Ист-Вест Технолоджис»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>“East-West Technologies” LTD</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>НИУ&#13;
«МИЭТ»; Московский государственный университет им. М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>NRU&#13;
“MIET”; Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>24</day><month>05</month><year>2023</year></pub-date><volume>24</volume><issue>1</issue><fpage>15</fpage><lpage>26</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Будиянская К.В., Кожухов И.Б., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Будиянская К.В., Кожухов И.Б.</copyright-holder><copyright-holder xml:lang="en">Budianskaia C.V., Kozhukhov I.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/1470">https://www.chebsbornik.ru/jour/article/view/1470</self-uri><abstract><p>Получено полное описание всех конгруэнций свободного унара с произвольным множеством свободных образующих. А именно, каждая конгруэнция однозначно определяется некоторым набором параметров, каждый из которых представляет собой целое неотрицательное число или символ ∞; сформулированы ограничения на эти параметры.</p></abstract><trans-abstract xml:lang="en"><p>We obtain a complete description of all congruences of a free unar with arbitrary set of free generators. Namely, every congruence is characterized uniquely by a collection of parameters which are either non-negative integers or the symbol ∞; the restrictions on the parameters are formulated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>полигон над полугруппой</kwd><kwd>унар</kwd><kwd>конгруэнция.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>act over senigroup</kwd><kwd>unar</kwd><kwd>congruence.</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа поддержана грантом РНФ № 22-11-00052</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">Kilp M., Knauer U., Mikhalev A.V. Monoids, acts and categories. N.Y. – Berlin W. de Gruyter,</mixed-citation><mixed-citation xml:lang="en">Kilp M., Knauer U., Mikhalev A.V., 2000, Monoids, acts and categories. 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