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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">mathnas</journal-id><journal-title-group><journal-title xml:lang="ru">Труды Института математики НАН Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Institute of Mathematics of the NAS of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1812-5093</issn><publisher><publisher-name>Институт математики НАН Беларуси</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">mathnas-47</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>МАТЕМАТИЧЕСКОЕ МОДЕЛИРОВАНИЕ И ЧИСЛЕННЫЕ МЕТОДЫ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICAL MODELING AND NUMERICAL METHODS</subject></subj-group></article-categories><title-group><article-title>О реализации спектрального метода Чебышёва для двумерных эллиптических уравнений со смешанными производными</article-title><trans-title-group xml:lang="en"><trans-title>On the implementation of the Chebyshev spectral method for two-dimensional elliptic equations with mixed derivatives</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>Волков</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Volkov</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">v.volkov@tut.by</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>Дун</surname><given-names>Цзинхуэй</given-names></name><name name-style="western" xml:lang="en"><surname>Dong</surname><given-names>JingHui</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution></aff><aff xml:lang="en"><institution>Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>03</day><month>03</month><year>2025</year></pub-date><volume>32</volume><issue>2</issue><fpage>82</fpage><lpage>92</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Волков В.М., Дун Ц., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Волков В.М., Дун Ц.</copyright-holder><copyright-holder xml:lang="en">Volkov V.M., Dong 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://mathnas.ejournal.by/jour/article/view/47">https://mathnas.ejournal.by/jour/article/view/47</self-uri><abstract><p>Рассмотрены вопросы построения численных алгоритмов на основе спектрального метода Чебышёва для приближенного решения эллиптических уравнений со смешанными производными в прямоугольной области с однородными краевыми условиями Дирихле. Для реализации спектрального метода использован стабилизированный метод би-сопряженных градиентов с переобусловливателями в виде разностных или спектральных аналогов оператора Лапласа. Проведено сравнение эффективности обработки переобусловлевателя с применением итерационного метода переменных направлений и алгоритма Бартелса-Стюарта. Представленные результаты показывают, что рассмотренные алгоритмы демонстрируют вычислительные характеристики, сопоставимые по времени вычислений на сетках одинаковой размерности с характеристиками разностных методов, однако многократно превосходят последние по точности в случае достаточно гладких решений</p></abstract><trans-abstract xml:lang="en"><p>The issues of constructing numerical algorithms based on the Chebyshev spectral method for approximate solution of elliptic equations with mixed derivatives in a rectangular domain with homogeneous Dirichlet boundary conditions are considered. To implement the spectral method, the biconjugate gradients stabilized method with preconditioners in the form of finite difference or spectral analogs of the Laplace operator is used. A comparison of the efficiency of processing the preconditioner using the iterative method of alternating directions and the Bartels-Stewart algorithm is carried out. The presented results show that the considered algorithms demonstrate computational characteristics comparable in computation time on grids of the same dimension with the characteristics of difference methods, but they are many times superior to the latter in accuracy in the case of sufficiently smooth solutions</p></trans-abstract><kwd-group xml:lang="ru"><kwd>спектральный метод Чебышёва</kwd><kwd>эллиптические уравнения со смешанными производными</kwd><kwd>стабилизированный метод би-сопряженных градиентов</kwd><kwd>метод переменных направлений</kwd><kwd>алгоритм Бартелса-Стюарта</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Chebyshev spectral method</kwd><kwd>Elliptic equations with mixed derivatives</kwd><kwd>biconjugate gradient stabilized method</kwd><kwd>alternating directions implicit method</kwd><kwd>Bartels-Stewart algorithm</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">Самарский А. 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