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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">10.29235/1561-2430-2023-59-3-201-212</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-730</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>О вычислении функционалов от решения линейного СДУ Скорохода с хаосом первого порядка в коэффициентах</article-title><trans-title-group xml:lang="en"><trans-title>On the calculation of functionals from the solution of the linear Skorohod SDE with first-order chaos in the coefficients</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>Егоров</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Egorov</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Александр Дмитриевич Егоров, доктор физико-математических наук, главный научный сотрудник</p><p>220072</p><p>ул. Сурганова, 11</p><p>Минск</p></bio><bio xml:lang="en"><p>Alexandr D. Egorov, Dr. Sc. (Physics and Mathematics), Chief Researcher</p><p>220072</p><p>11, Surganov Str.</p><p>Minsk</p></bio><email xlink:type="simple">egorov@im.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт математики Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>02</day><month>10</month><year>2023</year></pub-date><volume>59</volume><issue>3</issue><fpage>201</fpage><lpage>212</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Егоров А.Д., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Егоров А.Д.</copyright-holder><copyright-holder xml:lang="en">Egorov A.D.</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/730">https://vestifm.belnauka.by/jour/article/view/730</self-uri><abstract><p>   Настоящая работа посвящена точному и приближенному вычислению математического ожидания нелинейных функционалов от решения линейного уравнения Скорохода с хаосами первого порядка в коэффициентах и начальном условии. Известное общее решение данного уравнения содержит неизвестный функциональный параметр, определяемый как решение некоторого вспомогательного интегрального стохастического уравнения. В статье рассматриваются частные случаи, когда решение вспомогательного уравнения находится в явном виде. Вычисляются моменты решения и рассматриваются приближенные формулы для вычисления математических ожиданий некоторых видов нелинейных функционалов от решения. Приведены численные примеры, иллюстрирующие точность полученных формул.</p></abstract><trans-abstract xml:lang="en"><p>   This article is devoted to the precise and approximate calculation of the mathematical expectation of non-linear functionals from the solution of the linear Skorohod equation with first-order chaos in the coefficients and the initial condition. In [1–4], approximate methods for calculating the mathematical expectation of functionals from solutions of the linear Skorohod stochastic differential equation with a random initial condition and deterministic coefficient functions were proposed and investigated. This paper considers the calculation of the mathematical expectation of nonlinear functionals from the solution to the linear Skorohod equation with first-order chaos in the coefficients and the initial condition. In this case, the solution is obtained in an analytical form [<xref ref-type="bibr" rid="cit5">5</xref>]; however, it contains an unknown random parameter, determined as the solution of an auxiliary integral stochastic equation. In this paper we investigate the cases when the solution of this integral equation is found in an explicit form and then evaluate the moments and the mathematical expectations of some types of functional from the solution of the initial Skorohod equation. The construction of approximate formulas for calculating more general nonlinear functionals from the solution is considered. Numerical examples are given to illustrate the accuracy of the obtained formulas.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>стохастические дифференциальные уравнения</kwd><kwd>уравнения Скорохода</kwd><kwd>математическиe ожидания функционалов от решений</kwd><kwd>приближенные формулы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>stochastic differential equations</kwd><kwd>Skorochod equation</kwd><kwd>mathematical expectations of functionals from solutions</kwd><kwd>approximate formulas</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">Egorov, A. D. Approximate formulas of the second order of accuracy for expectation of functionals from solution to linear SDE in Skorohod sence / A. D. Egorov, A. V. Zherelo // Nonlinear Phenom. 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