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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">10.29235/1561-8323-2020-64-5-526-533</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-910</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>Компактные разностные схемы для уравнения Клейна-Гордона</article-title><trans-title-group xml:lang="en"><trans-title>Compact difference schemes for Klein-Gordon equation</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, доктор физико-математических наук, профессор, главный научный сотрудник.ул. Сурганова, 11, 220072, Минск.</p></bio><bio xml:lang="en"><p>Matus Piotr P. - Corresponding Member, D. Sc. (Physics and Mathematics), Professor, Chief researcher, Institute of Mathematics of the National Academy of Sciences of Belarus.11, Surganov Str., 220072, Minsk.</p></bio><email xlink:type="simple">piotr.p.matus@gmail.com</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>Ань</surname><given-names>Х. Т. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Anh</surname><given-names>H. T. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хоанг Тхи Киеу Ань - аспирант.пр. Независимости, 4, 220030, Минск.</p></bio><bio xml:lang="en"><p>Hoang Thi Kieu Anh - Postgraduate student, Belarusian State University.4, Niezavisimosti Ave., 220030, Minsk.</p></bio><email xlink:type="simple">kieuanhhoang86@gmail.com</email><xref ref-type="aff" rid="aff-2"/></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>Белорусский государственный университет</institution></aff><aff xml:lang="en"><institution>Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>03</day><month>11</month><year>2020</year></pub-date><volume>64</volume><issue>5</issue><fpage>526</fpage><lpage>533</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Матус П.П., Ань Х.Т., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Матус П.П., Ань Х.Т.</copyright-holder><copyright-holder xml:lang="en">Matus P.P., Anh H.T.</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/910">https://doklady.belnauka.by/jour/article/view/910</self-uri><abstract><p>В настоящей работе рассматриваются компактные разностные схемы четвертого порядка аппроксимации для линейных, полулинейных и квазилинейных уравнений Клейна-Гордона. Для линейных уравнений доказывается сильная устойчивость разностного решения по отношению к малому возмущению начальных условий, правой части и коэффициентов уравнений. На примере вычислительного эксперимента показывается, как использовать правило Рунге для определения разных порядков скорости сходимости разностной схемы в случае наличия двух независимых переменных.</p></abstract><trans-abstract xml:lang="en"><p>In this paper, we consider compact difference approximation of the fourth-order schemes for linear, semi-linear, and quasilinear Klein-Gordon equations. with respect to a small perturbation of initial conditions, right-hand side, and coefficients of the linear equations the strong stability of difference schemes is proved. The conducted numerical experiment shows how Runge rule is used to determine the orders of convergence of the difference scheme in the case of two independent variables.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>компактная разностная схема</kwd><kwd>уравнение Клейна-Гордона</kwd><kwd>априорные оценки</kwd><kwd>устойчивость</kwd><kwd>сходимость</kwd></kwd-group><kwd-group xml:lang="en"><kwd>compact difference schemes</kwd><kwd>Klein-Gordon equation</kwd><kwd>priori estimates</kwd><kwd>stability</kwd><kwd>convergence</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">Паасонен, В. И. Компактные схемы для систем уравнений второго порядка с конвективными членами / В. И. Паасонен // Численные методы механики сплошной среды. - 1998. - Т. 3, № 1. - С. 55-66.</mixed-citation><mixed-citation xml:lang="en">Paasonen V. I. 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