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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">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2023-24-1-194-202</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1482</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>Краткие сообщения</subject></subj-group></article-categories><title-group><article-title>Критерий однозначной разрешимости спектральной задачи Пуанкаре для одного класса многомерных гиперболических уравнений</article-title><trans-title-group xml:lang="en"><trans-title>A criterion for the unique solvability of the spectral Poincare problem for a class of multidimensional 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>Алдашев</surname><given-names>Серик Аймурзаевич</given-names></name><name name-style="western" xml:lang="en"><surname>Aldashev</surname><given-names>Serik Aimurzaevich</given-names></name></name-alternatives><bio xml:lang="ru"><p>доктор физико-математических наук, профессор, ГНС</p></bio><bio xml:lang="en"><p>doctor of physics and mathematics, professor, MSW</p></bio><email xlink:type="simple">aldash51@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт математики и математического моделирования МОН РК </institution><country>Казахстан</country></aff><aff xml:lang="en"><institution>Institute of Mathematics and Mathematical Modeling of MES RK</institution><country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>25</day><month>05</month><year>2023</year></pub-date><volume>24</volume><issue>1</issue><fpage>194</fpage><lpage>202</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Алдашев С.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Алдашев С.А.</copyright-holder><copyright-holder xml:lang="en">Aldashev S.A.</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://www.chebsbornik.ru/jour/article/view/1482">https://www.chebsbornik.ru/jour/article/view/1482</self-uri><abstract><p>Двумерные спектральные задачи для гиперболических уравнений хорошо изучены, а их многомерные аналоги, насколько известно автору, исследованы мало. Это связано с тем, что в случае трех и более независимых переменных возникают трудности принципиального характера, так как весьма привлекательный и удобный метод сингулярноых интегральных уравнений, применяемый для двумерных задач, здесь не может быть использован из-за отсутствия сколько-нибудь полной теории многомерных сингулярных интегральных уравнений. Теория многомерных сферических функций, напротив, достаточно и полно изучена. Эти функции имеют важное приложение в математической и теоретической физике, и в теории многомерных сингулярных уравнений. В цилиндрической области евклидовапространства для одного класса многомерных гиперболических уравнений рассматривается спектральная задача Пуанкаре. Решение ищется в виде разложения по многомерным сферическим функциям. Доказаны теоремы существования и единственности решения.Получены условия однозначной разрешимости поставленной задачи, которые существенно зависят от высоты цилиндра.</p></abstract><trans-abstract xml:lang="en"><p>Two-dimensional spectral problems for hyperbolic equations are well studied, and their multidimensional analogs, as far as the author knows, have been little studied. This is due to the fact that in the case of three or more independent variables there are difficulties ofa fundamental nature, since the very attractive and convenient method of singular integral equations used for two-dimensional problems cannot be used here due to the absence of any complete theory of multidimensional singular integral equations. The theory of multidimensional spherical functions, on the contrary, has been adequately and fully studied. These functions have an important application in mathematical and theoretical physics, and in the theory of multidimensional singular equations. In the cylindrical domain of Euclidean space for a class of multidimensional hyperbolic equations, the Poincar? spectral problem is considered. The solution is sought as an expansion in multidimensional spherical functions. The existence and uniqueness theorems are proved. The conditions for the unique solvability of the problem, which significantly depend on the height of the cylinder, are obtained.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>многомерное гиперболическое уравнение</kwd><kwd>спектральная задача Пуанкаре</kwd><kwd>цилиндрическая область</kwd><kwd>разрешимость</kwd><kwd>критерия.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>multidimensional hyperbolic equation</kwd><kwd>Poincare spectral problem</kwd><kwd>cylindrical domain</kwd><kwd>solvability</kwd><kwd>criteria.</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">Бицадзе А.В. Уравнения смешанного типа,М.: Изд. АН СССР, 1959 - 164с.</mixed-citation><mixed-citation xml:lang="en">Bitsadze A. V.,1959, “Equations of mixed type” // Academy of Sciences USSR, M .: Pub. 164</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Нахушев А.М. Задачи со смещением для уравнения в частных производных, М.: Наука,</mixed-citation><mixed-citation xml:lang="en">p.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">- 287 с.</mixed-citation><mixed-citation xml:lang="en">Nakhushev A. M., 2006, “Tasks with an offset for an equation in private derivatives” // Moscow:</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Михлин С.Г. Многомерные сингулярные интегралы и интегральные уравнения, М.: Физ-</mixed-citation><mixed-citation xml:lang="en">Science 287 p.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">матгиз, 1962 - 254 с.</mixed-citation><mixed-citation xml:lang="en">Mikhlin S. G., 1962, “Multidimensional singular integrals and integral equations” Moscow:</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Алдашев С.А. Критерий однозначной разрешимости спектральной задачи Пуанкаре в ци-</mixed-citation><mixed-citation xml:lang="en">Fizmatgiz, 254 p.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">линдрической области для многомерного волнового уравнения//Материалы I Междуна-</mixed-citation><mixed-citation xml:lang="en">Aldashev S. A., 2011, “Criterion for unique solvability the Poincar? spectral problem in</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">родной конференции молодых ученых("Матем. моделирование фрактальных процессов,</mixed-citation><mixed-citation xml:lang="en">a cylindrical domain for of the multidimensional wave equation” // Proceedings of the I</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">родственные проблемы анализа и информатики"), Нальчик: НИИ ПМА КБНЦ РАН, 2011-</mixed-citation><mixed-citation xml:lang="en">International Conference of Mol. Scientists (“Mat. Simulation of fractal processes, related</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">с.35-39.</mixed-citation><mixed-citation xml:lang="en">problems of analysis and informatics ”), Nalchik: Scientific Research Institute PMA KBNC</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Алдашев С.А. Краевые задачи для многомерных гиперболических и смешанных урав-</mixed-citation><mixed-citation xml:lang="en">RAS, pp.35–39.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">нений. Алматы: Гылым, 1994 - 170с.</mixed-citation><mixed-citation xml:lang="en">Aldashev S. A., 1994, “Boundary value problems for multidimensional hyperbolic and mixed</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Алдашев С.А. О задачах Дарбу для одного класса многомерных гиперболических урав-</mixed-citation><mixed-citation xml:lang="en">equations” // Almaty: Gylym, 170 p.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">нений // Дифференц. уравнения, 1998, т.34, N.1 - с.64-68.</mixed-citation><mixed-citation xml:lang="en">Aldashev S. A., 1998, “On Darboux problems for one class multidimensional hyperbolic</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Камке Э. Справочник по обыкновенным дифференциальным уравнениям, М.: Наука, 1965</mixed-citation><mixed-citation xml:lang="en">equations” // Differ. the equations, Vol. 34, № 1 - pp. 64–68.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">- 703 с.</mixed-citation><mixed-citation xml:lang="en">Kamke E., 1965, Handbook of ordinary differential equations, M .: Science, 703 p.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Бейтмен Г., Эрдейи А. Высшие трансцендентные функции, т.2, М.: Наука, 1974 - 295 с.</mixed-citation><mixed-citation xml:lang="en">Bateman G., Erdei A., 1974, Higher Transcendental Functions, V. 2, M .: Science, 295 p.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Колмогоров А.Н., Фомин С.В. Элементы теории функций и функционального анализа,</mixed-citation><mixed-citation xml:lang="en">Kolmogorov A. N., Fomin S. V., 1976, Elements of the theory of functions and functional</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">М.: Наука, 1976 - 543 с.</mixed-citation><mixed-citation xml:lang="en">analysis, M .: Science, 543 p.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Тихонов А.Н., Самарский А.А. Уравнения математической физики, М.:Наука, 1966 - 724с.</mixed-citation><mixed-citation xml:lang="en">Tikhonov A. N., Samara A. A., 1966, Equations mathematical physics, M.: Science, 724 p.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Алдашев С.А. Корректность задачи Пуанкаре в цилиндрической области для много-</mixed-citation><mixed-citation xml:lang="en">Aldashev S. A., 2013, “The correctness of the Poincare problem in cylindrical domain for many</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">мерных гиперболических уравнений с волновым оператором//Журнал "Вычислительной</mixed-citation><mixed-citation xml:lang="en">-dimensional hyperbolic equations with the wave operator” // Journal “Computational and</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">и прикладной математик КНУ им. Т.Шевченко, Киев, 2013,№ 4(14)-с.68-76.</mixed-citation><mixed-citation xml:lang="en">Applied Mathematician”, KNU. T. Shevchenko, Kiev, № . 4 (14), pp.68–76.</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Смирнов В.И. Курс высшей математики, Т.4, r.2, М.: Наука, 1981-550с.</mixed-citation><mixed-citation xml:lang="en">Smirnov V. I.,1981, The course of higher mathematics, Vol.4, r.2, M .: Science, 550 p.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Алдашев С.А. Корректность задачи Пуанкаре в цилиндрической области для много-</mixed-citation><mixed-citation xml:lang="en">Aldashev S. A., 2010, “The correctness of the Poincar problem in cylindrical domain for a</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">мерного волнового уравнения // Современная математика и ее приложения. Уравнения с</mixed-citation><mixed-citation xml:lang="en">multi-dimensional wave equation” // Modern mathematics and its applications. Equations with</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">частными производными, 2010, т.67-с. 28-32.</mixed-citation><mixed-citation xml:lang="en">quotients Derivatives, Vol.67, pp. 28–32.</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Aldashev S.A. The well-posedness of the Poincare problem in a cylindrical domain for the higher</mixed-citation><mixed-citation xml:lang="en">Aldashev S. A., 2011, “The well-posedness of the Poincare problem in a cylindrical domain for</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">- dimensional wave equation// Journal of Mathematical sciences, 2011, vol.173, № 2-p.150-154.</mixed-citation><mixed-citation xml:lang="en">the higher - dimensional wave equation” // Journal of Mathematical sciences, Vol.173, № 2, pp.</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">–154.</mixed-citation><mixed-citation xml:lang="en">–154.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
