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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">10.22405/2226-8383-2024-25-2-222-234</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1740</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>Специальные случаи интерполяционной теоремы для классического исчисления предикатов</article-title><trans-title-group xml:lang="en"><trans-title>Special cases of the interpolation theorem for classical predicate calculus</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>Цибульский</surname><given-names>Дмитрий Алексеевич</given-names></name><name name-style="western" xml:lang="en"><surname>Cybulski</surname><given-names>Dmitry Alekseevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>аспирант</p></bio><bio xml:lang="en"><p>postgraduate student</p></bio><email xlink:type="simple">cybulski@pdmi.ras.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургское отделение Математического института им. В. А. Стеклова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St. Petersburg Branch of the Steklov Mathematical Institute of the RAS</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>19</day><month>07</month><year>2024</year></pub-date><volume>25</volume><issue>2</issue><fpage>222</fpage><lpage>234</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Цибульский Д.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Цибульский Д.А.</copyright-holder><copyright-holder xml:lang="en">Cybulski D.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://www.chebsbornik.ru/jour/article/view/1740">https://www.chebsbornik.ru/jour/article/view/1740</self-uri><abstract><p>В статье доказываются специальные случаи интерполяционной теоремы для классического исчисления предикатов без функциональных символов и равенства. Накладывая ограничения на интерполируемые формулы, можно доказать существование интерполянта особого вида: универсального, экзистенциального, хорновского и универсального хорновского. Наиболее интересен случай универсального хорновского интерполянта: аксиомы многих алгебраических систем задаются универсальными хорновскими формулами. Ре-зультаты, полученные в данной работе, могут быть полезны как с точки зрения теории доказательств, так и в приложениях, например, при решении задач искусственного интеллекта и разработке языков логического программирования. Статья написана в духе теории доказательств, основным инструментом для решения задачи служат секвенциальные исчисления и такие техники преобразования выводов, как обращение применений правил вывода, перестановка применений правил по С. К. Клини и прополка по В. П. Оревкову.Статья состоит из введения, разбитой на 3 параграфа основной части и заключения.Введение содержит краткий исторический обзор и обсуждение актуальности работы. В первом параграфе основной части вводятся необходимые определения и формулируется главный результат. Второй параграф посвящён описанию построенного В. П. Оревковым секвенциального исчисления KGL. Третий отведён доказательству основной теоремы. Заключение содержит обсуждение полученных результатов и краткий обзор перспектив дальнейшей работы.</p></abstract><trans-abstract xml:lang="en"><p>The article proves special cases of the interpolation theorem for the classical predicate calculus without functional symbols and equality. By imposing restrictions on the interpolated formulas, it is possible to prove the existence of an interpolant of a special kind: universal, existential, Horn and universal Horn. The most interesting case is the universal Horn interpolant: the axioms of many algebraic systems are given by universal Horn formulas. The results obtainedin this work can be useful both from the point of view of proof theory and in applications, for example, when solving problems of artificial intelligence and developing logical programming languages. The article is written in the spirit of proof theory, the main tools are sequential calculus and such techniques for proof transforming as reversing the applications of inferencerules, rearranging the applications of rules according to S. K. Kleene and weeding according to V.P.Orevkov.</p><p>The article consists of an introduction, the main part divided into 3 paragraphs, and a conclusion. The introduction contains a brief historical overview and discussion of the relevance of the work. In the first paragraph of the main part, the necessary definitions are introduced and the main result is formulated. The second paragraph is devoted to the description of thesequential calculus KGL constructed by V. P. Orevkov. The third one is devoted to the proof of the main theorem. The conclusion contains a discussion of the results obtained and a brief overview of the prospects for further work.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>интерполяционная теорема</kwd><kwd>классическое исчисление предикатов</kwd><kwd>универсальный интерполянт</kwd><kwd>хорновский интерполянт.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>interpolation theorem</kwd><kwd>classical predicate calculus</kwd><kwd>universal interpolant</kwd><kwd>Horn interpolant</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">Craig W. Linear Reasoning. A New Form of the Herbrand–Gentzen Theorem. // Jour. symbolic</mixed-citation><mixed-citation xml:lang="en">Craig, W. “Linear Reasoning. 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