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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">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 custom-type="elpub" pub-id-type="custom">matatecs-7</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>НАУЧНЫЕ РАБОТЫ СТУДЕНТОВ</subject></subj-group></article-categories><title-group><article-title>Об индексном множестве пунктуально категоричных конечнопорожденных структур</article-title><trans-title-group xml:lang="en"><trans-title>On the index set of punctually categorical finitely generated structures</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>Курмачева</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurmacheva</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кафедра алгебры и математической логики</p><p>ул. Кремлевская, д. 18, г. Казань, 420008</p></bio><bio xml:lang="en"><p>Department of Algebra and Mathematical Logic</p><p>18 Kremlyovskaya str., Kazan 420008</p></bio><email xlink:type="simple">xsanca@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский (Приволжский) федеральный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan Federal 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>31</day><month>10</month><year>2023</year></pub-date><volume>1</volume><issue>1</issue><fpage>69</fpage><lpage>77</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Курмачева А.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Курмачева А.А.</copyright-holder><copyright-holder xml:lang="en">Kurmacheva A.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/7">https://matatecs.elpub.ru/jour/article/view/7</self-uri><abstract><p>Статья посвящена оценке индексного множества конечнопорожденных структур, имеющих с точностью до пунктуального изоморфизма единственное пунктуальное представление. Показано, что это индексное множество является Π03 -полным.</p></abstract><trans-abstract xml:lang="en"><p>The paper is devoted to an estimation of the index set of finitelky generated structures which have precisely one punctual presentation up to punctual isomorphisms. It is shown that this index set is Π03-complete</p></trans-abstract><kwd-group xml:lang="ru"><kwd>примитивная рекурсия</kwd><kwd>пунктуальная категоричность</kwd><kwd>конечнопорожденная структура</kwd></kwd-group><kwd-group xml:lang="en"><kwd>primitive recursion</kwd><kwd>punctual categorcity</kwd><kwd>finitely generated structure</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">I. Sh. Kalimullin, A. G. Melnikov, K. M. Ng, Algebraic structures computable without delay, Theoret. Comput. Sci. 674, 73–98 (2017). DOI: https://doi.org/10.1016/j.tcs.2017.01.029</mixed-citation><mixed-citation xml:lang="en">I. 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