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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">Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences</journal-id><journal-title-group><journal-title xml:lang="en">Journal of Samara State Technical University, Ser. Physical and Mathematical Sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Самарского государственного технического университета. Серия «Физико-математические науки»</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1991-8615</issn><issn publication-format="electronic">2310-7081</issn><publisher><publisher-name xml:lang="en">Samara State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">66683</article-id><article-id pub-id-type="doi">10.14498/vsgtu1859</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Differential Equations and Mathematical Physics</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Дифференциальные уравнения и математическая физика</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 initial-boundary value problem with integral displacement for second-order hyperbolic and parabolic equations</article-title><trans-title-group xml:lang="ru"><trans-title>Вторая начально-краевая задача с интегральным смещением для гиперболических и параболических уравнений второго порядка</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4376-4003</contrib-id><contrib-id contrib-id-type="scopus">55892833300</contrib-id><contrib-id contrib-id-type="researcherid">R-5686-2016</contrib-id><contrib-id contrib-id-type="spin">9132-3234</contrib-id><name-alternatives><name xml:lang="en"><surname>Kozhanov</surname><given-names>Alexander I.</given-names></name><name xml:lang="ru"><surname>Кожанов</surname><given-names>Александр Иванович</given-names></name></name-alternatives><bio xml:lang="en"><p>Dr. Phys. &amp; Math. Sci., Professor; Chief Researcher; Lab. of Differential and Difference Equations<sup>1</sup>; Professor; Dept. of Higher Mathematics<sup>2</sup></p></bio><bio xml:lang="ru"><p>доктор физико-математических наук, профессор; главный научный сотрудник; лаб. дифференциальных и разностных уравнений<sup>1</sup>; профессор; каф. высшей математики<sup>2</sup></p></bio><email>kozhanov@math.nsc.ru</email><uri>http://www.mathnet.ru/person18220</uri><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3284-5302</contrib-id><contrib-id contrib-id-type="scopus">57221800436</contrib-id><name-alternatives><name xml:lang="en"><surname>Dyuzheva</surname><given-names>Alexandra V.</given-names></name><name xml:lang="ru"><surname>Дюжева</surname><given-names>Александра Владимировна</given-names></name></name-alternatives><bio xml:lang="en"><p>Cand. Phys. &amp; Math. Sci.; Associate Professor; Dept. of Higher Mathematics</p></bio><bio xml:lang="ru"><p>кандидат физико-математических наук; доцент; каф. высшей математики</p></bio><email>duzhevaalexandra@yandex.ru</email><uri>http://www.mathnet.ru/person53016</uri><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Sobolev Institute of Mathematics, Siberian Branch of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт математики им. С. Л. Соболева СО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Samara State Technical University</institution></aff><aff><institution xml:lang="ru">Самарский государственный технический университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-09-30" publication-format="electronic"><day>30</day><month>09</month><year>2021</year></pub-date><volume>25</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>423</fpage><lpage>434</lpage><history><date date-type="received" iso-8601-date="2021-04-28"><day>28</day><month>04</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-08-25"><day>25</day><month>08</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Authors; Samara State Technical University (Compilation, Design, and Layout)</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Авторский коллектив; Самарский государственный технический университет (составление, дизайн, макет)</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Authors; Samara State Technical University (Compilation, Design, and Layout)</copyright-holder><copyright-holder xml:lang="ru">Авторский коллектив; Самарский государственный технический университет (составление, дизайн, макет)</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/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/1991-8615/article/view/66683">https://journals.eco-vector.com/1991-8615/article/view/66683</self-uri><abstract xml:lang="en"><p>In this paper, we study the solvability of some non-local analogs of the second initial-boundary value problem for multidimensional hyperbolic and parabolic equations of the second order. We prove the existence and uniqueness theorems of regular solutions (which have all Sobolev generalized derivatives that are summable with a square and are included in the equation). Some generalization and amplification of the obtained results are also given.</p></abstract><trans-abstract xml:lang="ru"><p>Изучается разрешимость некоторых нелокальных аналогов второй начально-краевой задачи для многомерных гиперболических и параболического уравнений второго порядка. Доказываются теоремы существования и единственности регулярных (имеющих все суммируемые с квадратом обобщенные по С. Л. Соболеву производные, входящие в уравнение) решений. Приводятся также некоторые обобщения и усиления полученных результатов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hyperbolic equations</kwd><kwd>parabolic equations</kwd><kwd>integral boundary conditions</kwd><kwd>nonlocal problems</kwd><kwd>integral conditions</kwd><kwd>regular solutions</kwd><kwd>uniqueness</kwd><kwd>existence</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гиперболические уравнения</kwd><kwd>параболические уравнения</kwd><kwd>граничные условия интегрального вида</kwd><kwd>нелокальные задачи</kwd><kwd>интегральные условия</kwd><kwd>регулярные решения</kwd><kwd>единственность</kwd><kwd>существование</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was carried out with the financial support of the Ministry of education and science of the Russian Federation in the framework of state task no. 0778–2020–0005.</funding-statement><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Минобрнауки РФ в рамках государственного задания № 0778–2020–0005.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Cannon J. 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