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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">34592</article-id><article-id pub-id-type="doi">10.22363/2413-3639-2023-69-1-32-49</article-id><article-id pub-id-type="edn">ENHOAY</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">The second-order accuracy difference schemes for integral-type time-nonlocal parabolic problems</article-title><trans-title-group xml:lang="ru"><trans-title>Разностные схемы второго порядка точности для нелокальных по времени параболических задач интегрального типа</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ashyralyev</surname><given-names>Allaberen</given-names></name><name xml:lang="ru"><surname>Ашыралыев</surname><given-names>Алллаберен</given-names></name></name-alternatives><email>aallaberen@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ashyralyyev</surname><given-names>Charyyar</given-names></name><name xml:lang="ru"><surname>Ашыралыев</surname><given-names>Чарыяр</given-names></name></name-alternatives><email>charyar@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Bahcesehir University</institution></aff><aff><institution xml:lang="ru">Бахчешехир университет</institution></aff></aff-alternatives><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-alternatives id="aff3"><aff><institution xml:lang="en">Institute of Mathematics and Mathematical Modeling</institution></aff><aff><institution xml:lang="ru">Институт математики и математического моделирования</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">National University of Uzbekistan Named After Mirzo Ulugbek</institution></aff><aff><institution xml:lang="ru">Национальный университет Узбекистана им. М. Улугбека</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-03-31" publication-format="electronic"><day>31</day><month>03</month><year>2023</year></pub-date><volume>69</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>32</fpage><lpage>49</lpage><history><date date-type="received" iso-8601-date="2023-05-05"><day>05</day><month>05</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Ashyralyev A., Ashyralyyev C.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Ашыралыев А., Ашыралыев Ч.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Ashyralyev A., Ashyralyyev C.</copyright-holder><copyright-holder xml:lang="ru">Ашыралыев А., Ашыралыев Ч.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/CMFD/article/view/34592">https://journals.rudn.ru/CMFD/article/view/34592</self-uri><abstract xml:lang="en"><p style="text-align: justify;">This is a discussion on the second-order accuracy difference schemes for approximate solution of the integral-type time-nonlocal parabolic problems. The theorems on the stability of r-modified Crank-Nicolson difference schemes and second-order accuracy implicit difference scheme for approximate solution of the integral-type time-nonlocal parabolic problems in a Hilbert space with self-adjoint positive definite operator are established. In practice, stability estimates for the solutions of the second-order accuracy in t difference schemes for the one and multidimensional time-nonlocal parabolic problems are obtained. Numerical results are given.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Исследуются разностные схемы второго порядка точности для приближенного решения нелокальных по времени параболических задач интегрального типа. Установлены теоремы об устойчивости r-модифицированной разностной схемы Кранка-Николсона и неявной разностной схемы второго порядка точности для приближенного решения нелокальных по времени параболических задач интегрального типа в гильбертовом пространстве с самосопряженным положительно определенным оператором. В качестве приложения получены оценки устойчивости решений второго порядка точности по t разностных схем для одномерной и многомерной нелокальной во времени параболической задачи. Приведены численные результаты.</p></trans-abstract><kwd-group xml:lang="en"><kwd>nonlocal parabolic problem</kwd><kwd>second-order accuracy difference scheme</kwd><kwd>Crank-Nicolson scheme</kwd><kwd>implicit difference scheme</kwd><kwd>stability</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>нелокальная параболическая задача</kwd><kwd>разностная схема второго порядка точности</kwd><kwd>схема Кранка</kwd><kwd>Николсона</kwd><kwd>неявная разностная схема</kwd><kwd>устойчивость</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ашуров Р. Р., Мухиддинова А. Т. Обратная задача по определению плотности тепловых источников для уравнения субдиффузии// Дифф. уравн. - 2020. - 56, № 12. - C. 1596-1609.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Ашыралыев А., Соболевский П. Е. Разностные схемы высокого порядка точности для параболических уравнений с переменными коэффициентами// Докл. 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