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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">mathematics</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник российских университетов. Математика</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Universities Reports. Mathematics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2686-9667</issn><issn pub-type="epub">2782-3342</issn><publisher><publisher-name>Тамбовский государственный университет имени Г.Р. Державина</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20310/2686-9667-2025-30-150-183-204</article-id><article-id custom-type="elpub" pub-id-type="custom">mathematics-99</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>НАУЧНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group></article-categories><title-group><article-title>Двухпараметрические $C_{0}$-полугруппы линейных операторов на локально выпуклых пространствах</article-title><trans-title-group xml:lang="en"><trans-title>Two parameter $C_{0}$-semigroups of linear operators on locally convex spaces</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4819-943X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Эттайб</surname><given-names>Джавад</given-names></name><name name-style="western" xml:lang="en"><surname>Ettayb</surname><given-names>Jawad</given-names></name></name-alternatives><email xlink:type="simple">jawad.ettayb@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Региональная академия образования и обучения Касабланка–Сеттат, Университетская средняя школа Колледжа Хаммана Аль–Фатаваки</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Regional Academy of Education and Training Casablanca–Settat, Hamman Al–Fatawaki Collegiate High School</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>26</day><month>06</month><year>2025</year></pub-date><volume>30</volume><issue>150</issue><fpage>183</fpage><lpage>204</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Эттайб Д., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Эттайб Д.</copyright-holder><copyright-holder xml:lang="en">Ettayb J.</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://mathematics.elpub.ru/jour/article/view/99">https://mathematics.elpub.ru/jour/article/view/99</self-uri><abstract><p>Целью данной работы является изучение двухпараметрических (соответственно $n$-параметрических) экспоненциально равностепенно непрерывных $C_{0}$-полугрупп непрерывных линейных операторов на секвенциально полных локально выпуклых хаусдорфовых пространствах. В частности, мы демонстрируем теорему Хилле--Иосиды для двухпараметрических (соответственно $n$-параметрических) экспоненциально равностепенно непрерывных $C_{0}$-полугрупп непрерывных линейных операторов на секвенциально полных локально выпуклых хаусдорфовых пространствах. Кроме того, изучаются $n$-пара\-мет\-ри\-ческие $C_{0}$-полугруппы непрерывных линейных операторов на банаховых пространствах.</p></abstract><trans-abstract xml:lang="en"><p>The purpose of this paper is to study two parameter (resp. $n$-parameter) expo\-nen\-tial\-ly equicontinuous $C_{0}$-semigroups of continuous linear operators on sequentially complete locally convex Hausdorff spaces. In particular, we demonstrate the Hille--Yosida theorem for two parameter (resp. $n$-parameter) exponentially equicontinuous $C_{0}$-semigroups of continuous linear operators on sequentially complete locally convex Hausdorff spaces. Moreover, the $n$-parameter $C_{0}$-semigroups of continuous linear operators on Banach spaces are studied.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>$C_{0}$-полугруппы непрерывных линейных операторов</kwd><kwd>двухпараметрические полугруппы непрерывных линейных операторов</kwd><kwd>локально выпуклые пространства</kwd></kwd-group><kwd-group xml:lang="en"><kwd>$C_{0}$-semigroups of continuous linear  operators</kwd><kwd>two parameter semigroups of continuous linear operators</kwd><kwd>locally convex spaces</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">N.H. Abdelaziz, "Commutativity and generation of n-parameter semigroups of bounded linear operators", Houston Journal of Mathematics, 9:2 (1983), 151-156.</mixed-citation><mixed-citation xml:lang="en">N.H. 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