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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">10.29235/1561-8323-2020-64-2-135-143</article-id><article-id custom-type="elpub" pub-id-type="custom">dan-863</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>Коэффициентная устойчивость решений разностных схем, аппроксимирующих смешанные задачи для полулинейных гиперболических уравнений</article-title><trans-title-group xml:lang="en"><trans-title>Stability with respect to coefficients of solution of difference schemes approximating initial boundary-value problems for semi-linear hyperbolic equations</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</p></bio><bio xml:lang="en"><p>Matus Piotr P. – Corresponding Member, D. Sc. (Physics and Mathematics), Professor, Chief Researcher.</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>Лемешевский</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lemeshevsky</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лемешевский Сергей Владимирович – канд. физ.-мат. наук, директор.</p></bio><bio xml:lang="en"><p>Lemeshevsky Sergey V. – Ph. D. (Physics and Mathematics), Director.</p></bio><email xlink:type="simple">svl@im.bas-net.by</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Католический университет Люблина, Польша; Институт математики Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>John Paul II Catholic University of Lublin, Poland; Institute of Mathematics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт математики Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>17</day><month>05</month><year>2020</year></pub-date><volume>64</volume><issue>2</issue><fpage>135</fpage><lpage>143</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Матус П.П., Лемешевский С.В., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Матус П.П., Лемешевский С.В.</copyright-holder><copyright-holder xml:lang="en">Matus P.P., Lemeshevsky S.V.</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/863">https://doklady.belnauka.by/jour/article/view/863</self-uri><abstract><p>Исследуется коэффициентная устойчивость решения разностной схемы, аппроксимирующей смешанную задачу для одномерного полулинейного гиперболического уравнения. Получены оценки решения дифференциальной и разностной задач. При этом решение может разрушаться за конечное время. Установлена нижняя граница разрушения решения. В области существования решения получены оценки возмущения решения разностной схемы по отношению к возмущению коэффициентов уравнения, согласующиеся с оценками для дифференциальной задачи. Во всех случаях применялись метод энергетических неравенств, неравенство Бихари и его сеточный аналог.</p></abstract><trans-abstract xml:lang="en"><p>The stability with respect to coefficients of solution of a difference scheme approximating the initial boundary-value problem for the one-dimensional semi-linear hyperbolic equation is studied. The estimates of the solutions of both differential and difference problems are obtained. In the domain of existence of the solution, the estimates for perturbation of the solution of a difference scheme with respect to perturbation of the coefficients of the equation are obtained. These estimates are consistent with the estimates for the differential problem. In all cases, the method of energy inequalities, the Bihari inequality and its mesh analogue are used.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>полулинейное гиперболическое уравнение</kwd><kwd>разностная схема</kwd><kwd>коэффициентная устойчивость</kwd><kwd>метод энергетических неравенств</kwd></kwd-group><kwd-group xml:lang="en"><kwd>semi-linear hyperbolic equation</kwd><kwd>difference scheme</kwd><kwd>stability with respect to coefficients</kwd><kwd>the method of energy inequalities</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">Levine, H. A. Instability and Nonexistence of Global Solutions to Nonlinear Wave Equations of the Form Pu tt = = −Au + F(u) / H. A. 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