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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">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</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">10.29235/1561-2430-2021-57-1-14-22</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-564</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>Приближенное вычисление функциональных интегралов, порожденных уравнением Дирака с псевдоспиновой симметрией</article-title><trans-title-group xml:lang="en"><trans-title>Approximate evaluation of the functional integrals generated by the Dirac equation with pseudospin symmetry</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>Айрян</surname><given-names>Э. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ayryan</surname><given-names>Е. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Айрян Эдик Арташевич – кандидат физико-математических наук, заведующий сектором</p><p>ул. Жолио-Кюри, 6, 141980, г. Дубна</p><p>ул. Университетская, 19, 141980, г. Дубна</p></bio><bio xml:lang="en"><p>Edik A. Ayryan – Ph. D. (Physics and Mathematics), Head of Sector</p></bio><email xlink:type="simple">ayrjan@jinr.ru</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>Гнатич</surname><given-names>М.</given-names></name><name name-style="western" xml:lang="en"><surname>Hnatic</surname><given-names>М.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гнатич Михал – доктор физико-математических наук наук, профессор, заместитель директора</p><p>ул. Жолио-Кюри, 6, 141980, г. Дубна</p><p>ул. Ватсонова, 47, 040 01, г. Кошице</p><p>Парк Ангелинум, 9, 040 01, г. Кошице</p></bio><bio xml:lang="en"><p>Michal Hnatic – Dr. Sc. (Physics and Mathematics), Professor, Deputy Director</p><p>6, Joliot-Curie Str., Dubna</p><p>47, Watsonova Str., Košice</p><p>9, Park Angelinum, Košice</p></bio><email xlink:type="simple">hnatic@saske.sk</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Малютин</surname><given-names>В. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Malyutin</surname><given-names>V. В.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Малютин Виктор Борисович – доктор физико- математических наук, главный научный сотрудник</p><p>ул. Сурганова, 11, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Victor B. Malyutin – Dr. Sc. (Physics and Mathematics), Principal Researcher</p><p>11, Surganov Str., 220072, Minsk</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Лаборатория информационных технологий,  Объединенный институт ядерных исследований; Государственный университет «Дубна»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Laboratory of Information Technologies, Joint Institute for Nuclear Research; State University «Dubna»</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Лаборатория теоретической физики им. Н. Н. Боголюбова,  Объединенный институт ядерных исследований; Институт экспериментальной физики Словацкой академии наук; Факультет естествознания, Университет Павла Йозефа Шафарика</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research; Institute of Experimental Physics, Slovak academy of Sciences; Faculty of Sciences, P. J. Šafárik University in Košice</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Институт математики Национальной академии наук Беларуси</institution><country>Беларусь</country></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus</institution><country>Belarus</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>30</day><month>03</month><year>2021</year></pub-date><volume>57</volume><issue>1</issue><fpage>14</fpage><lpage>22</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Айрян Э.А., Гнатич М., Малютин В.Б., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Айрян Э.А., Гнатич М., Малютин В.Б.</copyright-holder><copyright-holder xml:lang="en">Ayryan Е.A., Hnatic М., Malyutin V.В.</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://vestifm.belnauka.by/jour/article/view/564">https://vestifm.belnauka.by/jour/article/view/564</self-uri><abstract><p> Рассматриваются матричнозначные функциональные интегралы, порожденные уравнением Дирака с релятивистским гамильтонианом. Гамильтониан Дирака содержит скалярный и векторный потенциалы. Сумма скалярного и векторного потенциалов равна нулю, т. е. случай псевдоспиновой симметрии исследуется. В этом случае строится уравнение шредингеровского типа на собственные значения и собственные функции релятивистского гамильтониана, порождающего функциональный интеграл. Собственные значения и собственные функции оператора шредингеровского типа находятся с помощью метода последовательностей Штурма и метода обратной итерации. Предлагается метод для вычисления матричнозначных функциональных интегралов специального вида, который основан на соотношении между функциональным интегралом и ядром оператора эволюции с релятивистским гамильтонианом и на разложении ядра оператора эволюции по найденным собственным функциям релятивистского гамильтониана.</p></abstract><trans-abstract xml:lang="en"><p> In this paper, the matrix-valued functional integrals generated by the Dirac equation with relativistic Hamiltonian are considered. The Dirac Hamiltonian contains scalar and vector potentials. The sum of the scalar and vector potentials is equal to zero, i.e., the case of pseudospin symmetry is investigated. In this case, a Schrödinger-type equation for the eigenvalues and eigenfunctions of the relativistic Hamiltonian generating the functional integral is constructed. The eigenvalues and eigenfunctions of the Schrödinger-type operator are found using the Sturm sequence method and the reverse iteration method. A method for the evaluation of matrix-valued functional integrals is proposed. This method is based on the relation between the functional integral and the kernel of the evolution operator with the relativistic Hamiltonian and the expansion of the kernel of the evolution operator in terms of the found eigenfunctions of the relativistic Hamiltonian. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>функциональные интегралы</kwd><kwd>уравнение Дирака</kwd><kwd>релятивистский гамильтониан</kwd><kwd>псевдоспиновая симметрия</kwd><kwd>собственные функции гамильтониана</kwd><kwd>последовательность Штурма</kwd></kwd-group><kwd-group xml:lang="en"><kwd>functional integrals</kwd><kwd>Dirac equation</kwd><kwd>relativistic Hamiltonian</kwd><kwd>pseudospin symmetry</kwd><kwd>eigenfunctions of Hamiltonian</kwd><kwd>Sturm sequences</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">Glimm, J. Quantum Physics. A Functional Integral Point of View / J. Glimm, A. 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