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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8323-2019-63-3-263-269</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-610</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>МАТЕМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICS</subject></subj-group></article-categories><title-group><article-title>Разностные схемы для квазилинейных параболических уравнений со смешанными производными</article-title><trans-title-group xml:lang="en"><trans-title>Difference  schemes  for  quasi-linear  parabolic  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>Матус</surname><given-names>П. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Matus</surname><given-names>P. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Матус Петр Павлович – член-корреспондент, д-р физ.-мат. наук, профессор, гл. науч. сотрудник</p><p>ул. Сурганова, 11, 220072, Минск, Республика Беларусь</p></bio><bio xml:lang="en"><p>Matus Petr Pavlovich – Corresponding Member, D. Sc. (Physics and Mathematics), Professor, Chief researcher</p><p>11, Surganov Str., 220072, Minsk, Republic of Belarus</p></bio><email xlink:type="simple">matus@im.bas-net.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>Хиеу</surname><given-names>Ле Минь</given-names></name><name name-style="western" xml:lang="en"><surname>Hieu</surname><given-names>Le Minh</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ле Минь Хиеу – канд. физ.-мат. наук</p><p>ул. Нгу Хань Шон, 71, 550000, Дананг, Вьетнам</p></bio><bio xml:lang="en"><p>Le Minh Hieu – Ph. D. (Physics and Mathematics)</p><p>71, Ngu Han Sean Str., 550000, Danang, Vietnam</p></bio><email xlink:type="simple">hieulm@due.edu.vn</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пылак</surname><given-names>Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Pylak</surname><given-names>D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Пылак Дорота – канд. физ.-мат. наук</p><p>ул. Raclawickie, 14, 20-950, Люблин, Польша</p></bio><bio xml:lang="en"><p>Pylak Dorota – Ph. D. (Physics and Mathematics)</p><p>14, Raclawickie Str., 20-950, Lublin, Poland</p></bio><email xlink:type="simple">dorotab@kul.pl</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт математики Национальной академии наук Беларуси; Католический университет Люблина</institution></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus; Institute of Mathematics and Computer Science The John Paul II Catholic University of Lublin</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Университет экономики, Университет Дананга</institution></aff><aff xml:lang="en"><institution>University of Economics, University of Danang</institution></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Католический университет Люблина</institution></aff><aff xml:lang="en"><institution>Institute of Mathematics and Computer Science The John Paul II Catholic University of Lublin</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>27</day><month>06</month><year>2019</year></pub-date><volume>63</volume><issue>3</issue><fpage>263</fpage><lpage>269</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Матус П.П., Хиеу Л., Пылак Д., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Матус П.П., Хиеу Л., Пылак Д.</copyright-holder><copyright-holder xml:lang="en">Matus P.P., Hieu L., Pylak D.</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://doklady.belnauka.by/jour/article/view/610">https://doklady.belnauka.by/jour/article/view/610</self-uri><abstract><p>Настоящая работа посвящена построению монотонных разностных схем второго порядка точности для двумерного квазилинейного параболического уравнения со смешанными производными. Получены двусторонние оценки решения конкретных разностных схем для исходной задачи, которые полностью согласованные с аналогичными оценками решения дифференциальной задачи, а также доказана важная априорная оценка в равномерной норме C. Полученные оценки применяются для доказательства сходимости разностных схем в сеточной норме L2.</p></abstract><trans-abstract xml:lang="en"><p>The present paper is devoted to constructing second-order monotone difference schemes for two-dimensional quasi-linear parabolic equation with mixed derivatives. Two-sided estimates of the solution of specific difference schemes for the original problem are obtained, which are fully consistent with similar estimates of the solution of the differential problem, and the a priori estimate in the uniform norm of C is proved. The estimates obtained are used to prove the convergence of difference schemes in the grid norm of L2.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>уравнение со смешанными производными</kwd><kwd>принцип максимума</kwd><kwd>равномерная сетка</kwd><kwd>монотонная разностная схема</kwd><kwd>двусторонние оценки</kwd></kwd-group><kwd-group xml:lang="en"><kwd>equation with mixed derivatives</kwd><kwd>maximum principle</kwd><kwd>uniform grid</kwd><kwd>monotone difference scheme</kwd><kwd>two-sided estimates</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. А. Теория разностных схем / А. А. Самарский. – М., 1989. – 616 с.</mixed-citation><mixed-citation xml:lang="en">Samarskii A. A. Theory of difference schemes. Moscow, 1989. 616 р. 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