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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">Discrete and Continuous Models and Applied Computational Science</journal-id><journal-title-group><journal-title xml:lang="en">Discrete and Continuous Models and Applied Computational Science</journal-title><trans-title-group xml:lang="ru"><trans-title>Discrete and Continuous Models and Applied Computational Science</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2658-4670</issn><issn publication-format="electronic">2658-7149</issn><publisher><publisher-name xml:lang="en">Peoples' Friendship University of Russia named after Patrice Lumumba (RUDN University)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">30326</article-id><article-id pub-id-type="doi">10.22363/2658-4670-2022-30-1-52-61</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">On the many-body problem with short-range interaction</article-title><trans-title-group xml:lang="ru"><trans-title>О задаче многих тел с близкодействием</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4650-4648</contrib-id><name-alternatives><name xml:lang="en"><surname>Gambaryan</surname><given-names>Mark M.</given-names></name><name xml:lang="ru"><surname>Гамбарян</surname><given-names>М. М.</given-names></name></name-alternatives><bio xml:lang="en"><p>PhD student of Department of Applied Probability and Informatics</p></bio><email>gamb.mg@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6541-6603</contrib-id><name-alternatives><name xml:lang="en"><surname>Malykh</surname><given-names>Mikhail D.</given-names></name><name xml:lang="ru"><surname>Малых</surname><given-names>М. Д.</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Physical and Mathematical Sciences, Assistant Professor of Department of Applied Probability and Informatics of Peoples’ Friendship University of Russia (RUDN University); Researcher in Meshcheryakov Laboratory of Information Technologies, Joint Institute for Nuclear Research</p></bio><email>malykh-md@rudn.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples’ Friendship University of Russia (RUDN University)</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Meshcheryakov Laboratory of Information Technologies Joint Institute for Nuclear Research</institution></aff><aff><institution xml:lang="ru">Лаборатория информационных технологий им. М.Г. Мещерякова Объединённый институт ядерных исследований</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-04-01" publication-format="electronic"><day>01</day><month>04</month><year>2022</year></pub-date><volume>30</volume><issue>1</issue><issue-title xml:lang="en">VOL 30, NO1 (2022)</issue-title><issue-title xml:lang="ru">ТОМ 30, №1 (2022)</issue-title><fpage>52</fpage><lpage>61</lpage><history><date date-type="received" iso-8601-date="2022-02-25"><day>25</day><month>02</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Gambaryan M.M., Malykh M.D.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Гамбарян М.М., Малых М.Д.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Gambaryan M.M., Malykh M.D.</copyright-holder><copyright-holder xml:lang="ru">Гамбарян М.М., Малых М.Д.</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/">http://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.rudn.ru/miph/article/view/30326">https://journals.rudn.ru/miph/article/view/30326</self-uri><abstract xml:lang="en"><p style="text-align: justify;">The classical problem of the interaction of charged particles is considered in the framework of the concept of short-range interaction. Difficulties in the mathematical description of short-range interaction are discussed, for which it is necessary to combine two models, a nonlinear dynamic system describing the motion of particles in a field, and a boundary value problem for a hyperbolic equation or Maxwell’s equations describing the field. Attention is paid to the averaging procedure, that is, the transition from the positions of particles and their velocities to the charge and current densities. The problem is shown to contain several parameters; when they tend to zero in a strictly defined order, the model turns into the classical many-body problem. According to the Galerkin method, the problem is reduced to a dynamic system in which the equations describing the dynamics of particles, are added to the equations describing the oscillations of a field in a box. This problem is a simplification, different from that leading to classical mechanics. It is proposed to be considered as the simplest mathematical model describing the many-body problem with short-range interaction. This model consists of the equations of motion for particles, supplemented with equations that describe the natural oscillations of the field in the box. The results of the first computer experiments with this short-range interaction model are presented. It is shown that this model is rich in conservation laws.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">В статье рассматривается классическая задача о взаимодействии заряженных частиц в рамках представления о близкодействии. Обсуждаются трудности математического описания близкодействия, для чего необходимо объединение двух моделей - нелинейной динамической системы, описывающей движение частиц в поле, и краевой задачи для гиперболического уравнения или уравнений Максвелла, описывающих поле. Уделено внимание процедуре осреднения, то есть перехода от положений частиц и их скоростей к плотностям заряда и тока. Показано, что задача содержит несколько параметров, при стремлении которых к нулю в строго определённом порядке рассматриваемая модель переходит в классическую задачу многих тел. По методу Галёркина эта задача сведена к динамической системе, в которой к уравнениям, описывающим динамику частиц, добавляются уравнения, описывающие колебания поля в ящике. Эта задача представляет собой упрощение, отличное от того, которое ведёт к классической механике. Её предлагается рассматривать как простейшую математическую модель, описывающую задачу многих тел с близкодействием. Эта модель состоит из уравнений движения частиц, к которым добавлены уравнения, описывающие собственные колебания поля в ящике. Представлены результаты первых компьютерных экспериментов с этой моделью близкодействия. Показано, что модель богата законами сохранения.</p></trans-abstract><kwd-group xml:lang="en"><kwd>many-body problem</kwd><kwd>Galerkin method</kwd><kwd>short-range interaction</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>задача многих тел</kwd><kwd>метод Галёркина</kwd><kwd>близкодействие</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>C. K. Birdsall and L. A. Bruce, Plasma physics via computer simulation. Bristol, Philadelphia and New York: Adam Hilger, 1991.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>R. W. Hockney and J. W. Eastwood, Computer simulation using particles. Bristol, Philadelphia and New York: Adam Hilger, 1988.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>V. P. Tarakanov, User’s manual for code KARAT. Springfield, VA: Berkley Research, 1999.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>E. Hairer, G. Wanner, and S. 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