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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">mathnas</journal-id><journal-title-group><journal-title xml:lang="ru">Труды Института математики НАН Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the Institute of Mathematics of the NAS of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1812-5093</issn><publisher><publisher-name>Институт математики НАН Беларуси</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.67268/1812-5093-2026-34-1-68-75</article-id><article-id custom-type="edn" pub-id-type="custom">YPMEOH</article-id><article-id custom-type="elpub" pub-id-type="custom">mathnas-140</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>ВЫЧИСЛИТЕЛЬНАЯ МАТЕМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>COMPUTATIONAL MATHEMATICS</subject></subj-group></article-categories><title-group><article-title>Об одном подходе к приближенному вычислению математических ожиданий от решений стохастических дифференциальных уравнений с дрейфом</article-title><trans-title-group xml:lang="en"><trans-title>On an approach to the approximate calculation of mathematical expectations from solutions of stochastic differential equations with drift</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>Жерело</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zherelo</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Минск</p></bio><bio xml:lang="en"><p>Minsk</p></bio><email xlink:type="simple">zherelo@bsu.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Белорусский государственный университет</institution></aff><aff xml:lang="en"><institution>Belarusian State University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>30</day><month>06</month><year>2026</year></pub-date><volume>34</volume><issue>1</issue><fpage>68</fpage><lpage>75</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Жерело А.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Жерело А.В.</copyright-holder><copyright-holder xml:lang="en">Zherelo A.V.</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://mathnas.ejournal.by/jour/article/view/140">https://mathnas.ejournal.by/jour/article/view/140</self-uri><abstract><p>Объектом исследования статьи является стохастическое дифференциальное уравнение Ито с дрейфом. В работе предложен метод приближенного вычисления математических ожиданий функций от решения рассматриваемого уравнения. Метод основан на использовании вспомогательного случайного процесса специального вида, зависящего только от процесса Винера. Такой подход позволяет использовать для получения приближенного значения искомого математического ожидания уже известные формулы приближенного вычисления для случая, когда функционал зависит только от процесса Винера. В работе представлены результаты численного эксперимента.</p></abstract><trans-abstract xml:lang="en"><p>The object of the paper's research is the stochastic differential equation of Ito with drift. The paper proposes a method for approximate calculation of mathematical expectations of functions from the solution of such equation. The method is based on the use of an auxiliary random process of a special kind that depends only on the Wiener process. This approach allows us to use the already known approximate calculation formulas for the case when the functional depends only on the Wiener process to obtain an approximate value of the desired mathematical expectation. The paper presents the results of a numerical experiment.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>случайный процесс</kwd><kwd>стохастическое дифференциальное уравнение</kwd><kwd>интеграл Ито</kwd><kwd>математическое ожидание</kwd><kwd>приближенные вычисления</kwd><kwd>слабые аппроксимации.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>random process</kwd><kwd>stochastic differential equation</kwd><kwd>Ito integral</kwd><kwd>mathematical expectation</kwd><kwd>approximate calculations</kwd><kwd>weak approximations</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">Brigo D., Mercurio F. 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