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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Doklady Mathematics</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Математика, информатика, процессы управления</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-9543</issn><issn publication-format="electronic">3034-5049</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">698442</article-id><article-id pub-id-type="doi">10.7868/S3034504925050188</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>MATHEMATICS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>МАТЕМАТИКА</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">ON THE GALOIS CONNECTION FOR CLOSED CLASSES OF INFINITARY FUNCTIONS</article-title><trans-title-group xml:lang="ru"><trans-title>О соответствии галуа для замкнутых классов инфинитарных функций</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Polyakov</surname><given-names>N. L</given-names></name><name xml:lang="ru"><surname>Поляков</surname><given-names>Н. Л</given-names></name></name-alternatives><email>produktov@hse.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shamolin</surname><given-names>M. V</given-names></name><name xml:lang="ru"><surname>Шамолин</surname><given-names>М. В</given-names></name></name-alternatives><bio xml:lang="en"><p>Corresponding member of the RAS</p></bio><bio xml:lang="ru"><p>член-корреспондент РАН</p></bio><email>shamolin@imec.msu.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">HSE University</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский университет “Высшая школа экономики”</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Moscow State University named after M. V. Lomonosov</institution></aff><aff><institution xml:lang="ru">Московский государственный университет имени М. В. Ломоносова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-09-15" publication-format="electronic"><day>15</day><month>09</month><year>2025</year></pub-date><volume>525</volume><issue>1</issue><issue-title xml:lang="en">VOL 525, NO1 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 525, №1 (2025)</issue-title><fpage>135</fpage><lpage>143</lpage><history><date date-type="received" iso-8601-date="2025-12-10"><day>10</day><month>12</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-09-15"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/2686-9543/article/view/698442">https://journals.eco-vector.com/2686-9543/article/view/698442</self-uri><abstract xml:lang="en"><p>In this paper, Galois theory is developed for closed sets of functions of any ordinal arity. The classical theorem on Galois-closed classes of functions and sets of predicates on finite sets is transferred to the general case.</p></abstract><trans-abstract xml:lang="ru"><p>В работе развивается теория Галуа для замкнутых множеств функций любой ординальной ариости. Классическая теорема о галуа-замкнутых классах функций и множеств предикатов на конечных множествах переносится на общий случай.</p></trans-abstract><kwd-group xml:lang="en"><kwd>infinitary function</kwd><kwd>closed class</kwd><kwd>clone</kwd><kwd>Galois connection</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>инфинитарная функция</kwd><kwd>замкнутый класс</kwd><kwd>клон</kwd><kwd>соответствие Галуа</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Geiger D. Closed systems of functions and predicates // Pacific journal of mathematics. 1968. V. 27. № 1. 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