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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Contemporary Mathematics. Fundamental Directions</journal-id><journal-title-group><journal-title xml:lang="en">Contemporary Mathematics. Fundamental Directions</journal-title><trans-title-group xml:lang="ru"><trans-title>Современная математика. Фундаментальные направления</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2413-3639</issn><issn publication-format="electronic">2949-0618</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">22258</article-id><article-id pub-id-type="doi">10.22363/2413-3639-2018-64-1-1-19</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>New Results</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Новые результаты</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">A Stable Diﬀerence Scheme for a Third-Order Partial Diﬀerential Equation</article-title><trans-title-group xml:lang="ru"><trans-title>Устойчивая разностная схема для уравнения в частных производных третьего порядка</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ashyralyev</surname><given-names>A</given-names></name><name xml:lang="ru"><surname>Ашыралиев</surname><given-names>А</given-names></name></name-alternatives><email>allaberen.ashyralyev@neu.edu.tr</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Belakroum</surname><given-names>Kh</given-names></name><name xml:lang="ru"><surname>Белакрум</surname><given-names>Х</given-names></name></name-alternatives><email>kheireddinebelakroum@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff id="aff1"><institution>Near East University</institution></aff><aff-alternatives id="aff2"><aff><institution xml:lang="en">RUDN University</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><aff id="aff3"><institution>Fre´res Mentouri University</institution></aff><pub-date date-type="pub" iso-8601-date="2018-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2018</year></pub-date><volume>64</volume><issue>1</issue><issue-title xml:lang="en">Diﬀerential and Functional Diﬀerential Equations</issue-title><issue-title xml:lang="ru">Дифференциальные и функционально-дифференциальные уравнения</issue-title><fpage>1</fpage><lpage>19</lpage><history><date date-type="received" iso-8601-date="2019-11-29"><day>29</day><month>11</month><year>2019</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Contemporary Mathematics. Fundamental Directions</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Современная математика. Фундаментальные направления</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Contemporary Mathematics. Fundamental Directions</copyright-holder><copyright-holder xml:lang="ru">Современная математика. Фундаментальные направления</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://journals.rudn.ru/CMFD/article/view/22258">https://journals.rudn.ru/CMFD/article/view/22258</self-uri><abstract xml:lang="en">The nonlocal boundary-value problem for a third order partial diﬀerential equation  in a Hilbert space H with a self-adjoint positive deﬁnite operator A is considered. A stable three-step diﬀerence scheme for the approximate solution of the problem is presented. The main theorem on stability of this diﬀerence scheme is established. In applications, the stability estimates for the solution of diﬀerence schemes of the approximate solution of three nonlocal boundary value problems for third order partial diﬀerential equations are obtained. Numerical results for oneand two-dimensional third order partial diﬀerential equations are provided.</abstract><trans-abstract xml:lang="ru">Рассматривается нелокальная краевая задача для уравнения в частных производных третьего порядка с самосопряженным положительно определенным оператором A в гильбертовом пространстве H. Приводится устойчивая трехшаговая разностная схема для приближенного решения задачи. Для этой разностной схемы доказывается основная теорема об устойчивости. В качестве приложений, для трех нелокальных краевых задач для уравнений в частных производных третьего порядка получены оценки устойчивости приближенных решений, полученных при помощи разностных схем.</trans-abstract></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Амиров Ш., Кожанов А. И. Смешанная задача для одного класса сильно нелинейных уравнений соболевского типа высокого порядка// Докл. РАН. - 2013. - 451, № 5. - С. 492-494.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Власов В. В., Раутиан Н. А. Спектральный анализ функционально-дифференциальных уравнений. - М.: МАКС Пресс, 2016.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Габов Г. А., Свешников А. Г. Задачи динамики стратифицированных жидкостей. - М.: Наука, 1986.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Кожанов А. И. 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