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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">10.22405/2226-8383-2026-27-2-139-144</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-2231</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>Краткие сообщения</subject></subj-group></article-categories><title-group><article-title>О численной реализации одного метода решения дифференциальных уравнений в частных производных с применением теоретико-числовых сеток</article-title><trans-title-group xml:lang="en"><trans-title>On the numerical implementation of one method for solving partial differential equations using number-theoretic grids</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>Басалов</surname><given-names>Юрий Александрович</given-names></name><name name-style="western" xml:lang="en"><surname>Basalov</surname><given-names>Yurij Aleksandrovich</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">basalov_yurij@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>Белов</surname><given-names>Роман Александрович</given-names></name><name name-style="western" xml:lang="en"><surname>Belov</surname><given-names>Roman Aleksandrovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>магистрант</p></bio><bio xml:lang="en"><p>master’s student</p></bio><email xlink:type="simple">roman-belov.1234@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Тульский государственный педагогический университет им. Л. Н. Толстого</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Tula State Lev Tolstoy Pedagogical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>13</day><month>07</month><year>2026</year></pub-date><volume>27</volume><issue>2</issue><fpage>139</fpage><lpage>144</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Басалов Ю.А., Белов Р.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Басалов Ю.А., Белов Р.А.</copyright-holder><copyright-holder xml:lang="en">Basalov Y.A., Belov R.A.</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/2231">https://www.chebsbornik.ru/jour/article/view/2231</self-uri><abstract><p>В работе численно сравниваются два метода решения периодического уравнения Пуассона −Δ𝑢 = 𝑓 на двумерном торе [0, 1)2: классическое двумерное БПФ на равномерной сетке 𝑁 × 𝑁 и алгоритм на параллелепипедальной сетке 𝑀(𝑎, 𝑝), сводящий вычисление коэффициентов Фурье решения к одномерному ДПФ длины 𝑝 от значений правой части в узлах сетки. Сравнение методов производится на двух модельных задачах с гладкой и кусочно-гладкой правыми частями.</p></abstract><trans-abstract xml:lang="en"><p>We numerically compare two methods for solving the periodic Poisson equation −Δ𝑢 = 𝑓 on the two-dimensional torus [0, 1)2: the classical two-dimensional FFT on a uniform 𝑁 × 𝑁 grid, and A. V. Rodionov’s algorithm on the parallelepipedal grid 𝑀(𝑎, 𝑝), which reduces thecomputation of Fourier coefficients of the solution to a one-imensional DFT of length 𝑝 over the values of the right-hand side at the grid nodes. The comparison of methods is carried out on two model problems with smooth and piecewise-smooth right-hand sides.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>теоретико-числовые сетки</kwd><kwd>оптимальные коэффициенты</kwd><kwd>уравнения в частных производных</kwd><kwd>уравнение Пуассона</kwd><kwd>быстрое преобразование Фурье.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>number-theoretic grids</kwd><kwd>optimal coefficients</kwd><kwd>partial differential equations</kwd><kwd>Poisson equation</kwd><kwd>fast Fourier transform.</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">Коробов Н. М. Теоретико-числовые методы в приближённом анализе. М.: Физматгиз, 1963.</mixed-citation><mixed-citation xml:lang="en">Korobov, N. M. 1963, Number-Theoretic Methods in Approximate Analysis, Moscow: Fizmatgiz. 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