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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">10.20310/2686-9667-2022-27-137-80-94</article-id><article-id custom-type="elpub" pub-id-type="custom">mathematics-138</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>ARTICLES</subject></subj-group></article-categories><title-group><article-title>Устойчивость трехслойной симметричной дифференциально-разностной схемы в классе суммируемых на сетеподобной области функций</article-title><trans-title-group xml:lang="en"><trans-title>Stability of a three-layer symmetric differential-difference scheme in the class of functions summable on a network-like domain</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>Провоторов</surname><given-names>Вячеслав Васильевич</given-names></name><name name-style="western" xml:lang="en"><surname>Provotorov</surname><given-names>Vyacheslav V.</given-names></name></name-alternatives><email xlink:type="simple">wwprov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хоанг</surname><given-names>Ван Нгуен</given-names></name><name name-style="western" xml:lang="en"><surname>Hoang</surname><given-names>Van N.</given-names></name></name-alternatives><email xlink:type="simple">fadded9x@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Воронежский государственный университет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Voronezh State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>25</day><month>03</month><year>2022</year></pub-date><volume>27</volume><issue>137</issue><fpage>80</fpage><lpage>94</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Провоторов В.В., Хоанг В.Н., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Провоторов В.В., Хоанг В.Н.</copyright-holder><copyright-holder xml:lang="en">Provotorov V.V., Hoang V.N.</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/138">https://mathematics.elpub.ru/jour/article/view/138</self-uri><abstract><p>В работе получены условия устойчивости трехслойной симметричной дифференциально-разностной схемы с весовым параметром в классе функций, суммируемых на сетеподобной области. Для анализа устойчивости в пространстве допустимых решений H дифференциально-разностной системы вводится составная норма, имеющая структуру нормы пространства H2 =H⊕H . А именно, для Y={Y 1 , Y 2 }∈ H2 , Yl ∈H (l=1,2) , ∥Y∥ H 2 = ∥ Y 1 ∥ 1,H 2 + ∥ Y 2 ∥ 2,H 2 , где ∥·∥ 1,H 2 ∥·∥ 2,H 2 - некоторые нормы H . Использование такой нормы при описании энергетического тождества открывает путь построения априорных оценок для слабых решений дифференциально-разностной системы, удобных при практической проверке в случае конкретных дифференциально-разностных схем. Полученные результаты могут быть использованы для анализа задач оптимизации, возникающих при моделировании сетеподобных процессов переноса формализмами дифференциально-разностных систем.</p></abstract><trans-abstract xml:lang="en"><p>In the paper, the stability conditions of a three-layer symmetric differential-difference scheme with a weight parameter in the class of functions summable on a network-like domain are obtained. To analyze the stability of the differential-difference system in the space of feasible solutions H , a composite norm is introduced that has the structure of a norm in the space H2 = H⊕H . Namely, for Y={Y 1 , Y 2 }∈ H2 , Yl ∈ H (l=1,2) , ∥ Y∥ H 2 = ∥ Y 1 ∥ 1, H 2 + ∥ Y 2 ∥ 2, H 2 , where ∥·∥ 1, H 2 ∥·∥ 2, H 2 are some norms in H . The use of such a norm in the description of the energy identity opens the way for constructing a priori estimates for weak solutions of the differential-difference system, convenient for practical testing in the case of specific differentialdifference schemes. The results obtained can be used to analyze optimization problems that arise when modeling network-like transfer processes with the help of formalisms of differentialdifference systems.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>многомерная сетеподобная область</kwd><kwd>дифференциально-разностная система</kwd><kwd>устойчивость дифференциально-разностной схемы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>multidimensional network-like domain</kwd><kwd>differential-difference system</kwd><kwd>stability of differential-difference scheme</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">В.Н. Хоанг, “Дифференциально-разностная краевая задача для параболической системы с распределенными параметрами на графе”, Процессы управления и устойчивость, 7:1 (2020), 127-132.</mixed-citation><mixed-citation xml:lang="en">В.Н. 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