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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8323-2026-70-4-280-285</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-1319</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>МАТЕМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICS</subject></subj-group></article-categories><title-group><article-title>Представление пространства максимальных идеалов в виде расслоенного произведения</article-title><trans-title-group xml:lang="en"><trans-title>Representation of the maximal ideal space as a fiber product</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-7156-4869</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Люксембург</surname><given-names>И. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Luxemburg</surname><given-names>J. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Люксембург Иосиф Леонович – мл. науч. сотрудник </p><p>ул. Сурганова, 11, 220072, Минск </p></bio><bio xml:lang="en"><p>Luxemburg Josef L. – Junior Researcher </p><p>11, Surganov Str., 220072, Minsk </p></bio><email xlink:type="simple">josef2016kolbasidze@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт математики Национальной академии наук Беларуси</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>29</day><month>08</month><year>2026</year></pub-date><volume>70</volume><issue>4</issue><fpage>280</fpage><lpage>285</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Люксембург И.Л., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Люксембург И.Л.</copyright-holder><copyright-holder xml:lang="en">Luxemburg J.L.</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://doklady.belnauka.by/jour/article/view/1319">https://doklady.belnauka.by/jour/article/view/1319</self-uri><abstract><p>Исследована связь топологической структуры пространства максимальных идеалов коммутативной С*-алгебры с топологическими структурами пространств максимальных идеалов ее подалгебр. Доказана теорема о вложении спектра рассматриваемой алгебры в расслоенное произведение спектров ее подалгебр. Сформулирован критерий совпадения спектра с указанным расслоенным произведением. В качестве приложения рассмотренный метод применен для описания топологии спектров алгебр разрывных функций.</p></abstract><trans-abstract xml:lang="en"><p>This paper investigates the relationship between the topological structure of the maximal ideal space of a commutative C*-algebra and the topological structures of the maximal ideal spaces of its subalgebras. A theorem is proved regarding the embedding of the spectrum of the algebra under consideration into the fiber product of the spectra of its subalgebras. A criterion for the coincidence of the spectrum with the specified fiber product is formulated. As an application, the method described above is used to describe the topology of the spectra of algebras of discontinuous functions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>разрывная функция</kwd><kwd>банахова алгебра</kwd><kwd>функциональная алгебра</kwd><kwd>преобразование Гельфанда</kwd><kwd>пространство максимальных идеалов</kwd><kwd>расслоенное произведение</kwd><kwd>конфлюэнтный спектр</kwd></kwd-group><kwd-group xml:lang="en"><kwd>discontinuous function</kwd><kwd>Banach algebra</kwd><kwd>function algebra</kwd><kwd>Gelfand transform</kwd><kwd>maximal ideal space</kwd><kwd>fiber product</kwd><kwd>confluent spectrum</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке НАН Беларуси в рамках государственной программы «Конвергенция–2030» (задание 1.08.1).</funding-statement><funding-statement xml:lang="en">This work was supported by the National Academy of Sciences of Belarus within the framework of the state program “Convergence–2030” (task 1.08.1).</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">Гельфанд, И. 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