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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">10.22405/2226-8383-2022-23-3-169-177</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1350</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>Топологические и гомологические свойства пространства орбит простой трёхмерной компактной линейной группы Ли</article-title><trans-title-group xml:lang="en"><trans-title>Topological and homological properties of the orbit space of a simple three-dimensional compact linear Lie group</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>Стырт</surname><given-names>Олег Григорьевич</given-names></name><name name-style="western" xml:lang="en"><surname>Styrt</surname><given-names>Oleg Grigorievich</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук</p></bio><bio xml:lang="en"><p>candidate of physical and mathematical sciences</p></bio><email xlink:type="simple">oleg_styrt@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский физико-технический институт</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow Institute of Physics and Technology</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>20</day><month>12</month><year>2022</year></pub-date><volume>23</volume><issue>3</issue><fpage>169</fpage><lpage>177</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Стырт О.Г., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Стырт О.Г.</copyright-holder><copyright-holder xml:lang="en">Styrt O.G.</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/1350">https://www.chebsbornik.ru/jour/article/view/1350</self-uri><abstract><p>Работа посвящена вопросу о том, является ли пространство орбит компактной линейной группы топологическим многообразием и гомологическим многообразием. В данной работе рассмотрен случай простой трёхмерной группы. Получена верхняя оценка для суммы целых частей половин размерностей неприводимых компонент представления, фактор которого является гомологическим многообразием, что усиливает прежний результат, дающий ту же оценку в случае, если фактор представления является гладким многообразием.Большинство представлений, удовлетворяющих данной оценке, также разобраны ранее.В рассуждениях использованы стандартные соображения линейной алгебры, теории групп и алгебр Ли и их представлений.</p></abstract><trans-abstract xml:lang="en"><p>The article is devoted to the question whether the orbit space of a compact linear group is a topological manifold and a homological manifold. In the paper, the case of a simple three-dimensional group is considered. An upper bound is obtained for the sum of the halfdimension integral parts of the irreducible components of a representation whose quotient space is a homological manifold, that enhances an earlier result giving the same bound if the quotientspace of a representation is a smooth manifold. The most of the representations satisfying this bound are also researched before. In the proofs, standard arguments from linear algebra, theory of Lie groups and algebras and their representations are used.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>группа Ли</kwd><kwd>линейное представление группы</kwd><kwd>топологический фактор действия</kwd><kwd>топологическое многообразие</kwd><kwd>гомологическое многообразие.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Lie group</kwd><kwd>linear representation of a group</kwd><kwd>topological quotient space of an action</kwd><kwd>topological manifold</kwd><kwd>homological manifold.</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">Михайлова М. А. О факторпространстве по действию конечной группы, порожденной</mixed-citation><mixed-citation xml:lang="en">Mikhailova, M. 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