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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 pub-id-type="doi">10.26907/2949-3919.2024.3.29-45</article-id><article-id custom-type="elpub" pub-id-type="custom">matatecs-51</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></article-categories><title-group><article-title>Полугрупповая C∗-алгебра, порожденная свободным произведением абелевых полугрупп</article-title><trans-title-group xml:lang="en"><trans-title>Semigroup C∗-algebras generated by a free product of abelian semigroups</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>Григорян</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Grigoryan</surname><given-names>S. А.</given-names></name></name-alternatives><bio xml:lang="ru"><sec><title>Сурен Аршакович Григорян</title><p>ул. Красносельская, д. 51, г. Казань, 420066</p></sec></bio><bio xml:lang="en"><sec><title>Suren Arshakovich Grigoryan</title><p>51 Krasnoselskaya str., Kazan 420066</p></sec></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Григорян</surname><given-names>Т. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Grigoryan</surname><given-names>T. A.</given-names></name></name-alternatives><bio xml:lang="ru"><sec><title>Тамара Анатольевна Григорян</title><p>ул. Красносельская, д. 51, г. Казань, 420066</p></sec></bio><bio xml:lang="en"><sec><title>Tamara Anatolievna Grigoryan</title><p>51 Krasnoselskaya str., Kazan 420066</p></sec></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Казанский государственный энергетический университет<country>Россия</country></aff><aff xml:lang="en">Kazan State Power-Engineering University<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>20</day><month>10</month><year>2024</year></pub-date><volume>2</volume><issue>3</issue><fpage>29</fpage><lpage>45</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Григорян С.А., Григорян Т.А., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Григорян С.А., Григорян Т.А.</copyright-holder><copyright-holder xml:lang="en">Grigoryan S.А., Grigoryan T.A.</copyright-holder><license 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/51">https://matatecs.elpub.ru/jour/article/view/51</self-uri><abstract><p>Исследуются полугрупповые C∗-алгебры, порожденные регулярным представлением свободных произведений абелевых полугрупп. Приведен критерий простоты таких алгебр, описаны характеры, градуировка и ряд других свойств.</p></abstract><trans-abstract xml:lang="en"><p>The article deals with semigroup C∗-algebras generated by regular representations of free products of abelian semigroups. A criterion of the simplicity of this algebras is obtained, characters, grading and a number of other properties are described.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>свободная группа</kwd><kwd>свободная полугруппа</kwd><kwd>C∗-алгебра</kwd><kwd>спектр</kwd><kwd>идеал</kwd></kwd-group><kwd-group xml:lang="en"><kwd>free group</kwd><kwd>free semigroup</kwd><kwd>C∗-algebra</kwd><kwd>spectrum</kwd><kwd>ideal</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">L.A. Coburn, The C∗-algebra generated by an isometry, Bull. Amer. Math. Soc. 73 (5), 722–726 (1967). 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