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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">matatecs</journal-id><journal-title-group><journal-title xml:lang="ru">Математика и теоретические компьютерные науки</journal-title><trans-title-group xml:lang="en"><trans-title>Mathematics and Theoretical Computer Science</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2949-3919</issn><publisher><publisher-name>Казанский (Приволжский) федеральный университет</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">matatecs-6</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>СТАТЬИ</subject></subj-group></article-categories><title-group><article-title>Биллиарды переменной конфигурации и биллиарды с проскальзыванием в гамильтоновой геометрии и топологии</article-title><trans-title-group xml:lang="en"><trans-title>Billiards of variable configuration and billiards with slippage in Hamiltonian geometry and topology</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>Фоменко</surname><given-names>А. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Fomenko</surname><given-names>A. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>механико-математический факультет</p><p>Ленинские горы, д. 1, г. Москва, 119991</p></bio><bio xml:lang="en"><p>Faculty of Mechanics and Mathematics1 Leninskie Gory, Moscow, 119991</p></bio><email xlink:type="simple">atfomenko@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет имени М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>31</day><month>10</month><year>2023</year></pub-date><volume>1</volume><issue>1</issue><fpage>49</fpage><lpage>68</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Фоменко А.Т., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Фоменко А.Т.</copyright-holder><copyright-holder xml:lang="en">Fomenko A.T.</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://matatecs.elpub.ru/jour/article/view/6">https://matatecs.elpub.ru/jour/article/view/6</self-uri><abstract><p>Обнаружен класс биллиардов, геометрия которых может меняться при изменении энергии шара, движущегося по «биллиардному столу». Такие биллиарды названы силовыми или эволюционными. Они позволяют реализовать важные интегрируемые гамильтоновы системы (с двумя степенями свободы) сразу на всем фазовом 4-мерном пространстве системы, т. е. одновременно на всех регулярных изоэнергетических 3-мерных поверхностях. Автор и В.В. Ведюшкина доказали, что силовые биллиарды реализуют интегрируемые случаи Эйлера и Лагранжа в динамике тяжелого тела в трехмерном пространстве. Обнаружено, что эти две известные системы «биллиардно эквивалентны», хотя обладают интегралами разных степеней – квадратичным (Эйлер) и линейным (Лагранж).</p></abstract><trans-abstract xml:lang="en"><p>A class of billiards is found, the geometry of which can change with a change in the energy of a ball moving on a «billiard table». Such billiards are called force or evolutionary. They make it possible to implement important integrable Hamiltonian systems (with two degrees of freedom) on the entire phase 4-dimensional space of the system at once. That is, simultaneously on all regular isoenergetic 3-dimensional surfaces. The author and V.V. Vedyushkina proved that force billiards implement the Euler and Lagrange integrable cases in the dynamics of a heavy body in three-dimensional space. It is found that these two well-known systems «billiard equivalent», although they have integrals of different degrees – quadratic (Euler) and linear (Lagrange).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>силовые биллиарды</kwd><kwd>интегрируемая гамильтонова система</kwd><kwd>случаи Эйлера и Лагранжа</kwd></kwd-group><kwd-group xml:lang="en"><kwd>force billiards</kwd><kwd>integrable Hamiltonian systems</kwd><kwd>Euler and Lagrange cases</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">В. В. Ведюшкина, А. Т. Фоменко, Силовые эволюционные биллиарды и биллиардная эквивалентность случая Эйлера и случая Лагранжа, Докл. 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Isoenergetic Manifolds of Integrable Billiard Books, Moscow Univ. Math. Bull. 75 (4), 149–160 (2020) DOI: https://doi.org/10.3103/S0027132220040026</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">А. Т. Фоменко, В. В. Ведюшкина, Бильярды и интегрируемость в геометрии и физике. Новый взгляд и новые возможности, Вестн. Моск. ун-та. Сер. 1. Матем., мех. (3), 15–25 (2019). URL: http://mi.mathnet.ru/vmumm624</mixed-citation><mixed-citation xml:lang="en">A. T. Fomenko, V. V. Vedyushkina, Billiards and Integrability in Geometry and Physics. New Scope and New Potential, Moscow Univ. Math. Bull. 74 (3), 98–107 (2019). DOI: https://doi.org/10.3103/S0027132219030021</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">A. T. Fomenko, V. V. Vedyushkina, V. N. Zav’yalov, Liouville foliations of topological billiards with slipping, Russ. J. Math. Phys. 28 (1), 37–55 (2021). DOI: http://doi.org/10.1134/S1061920821010052</mixed-citation><mixed-citation xml:lang="en">A. T. Fomenko, V. V. Vedyushkina, V. N. Zav’yalov, Liouville foliations of topological billiards with slipping, Russ. J. Math. Phys. 28 (1), 37–55 (2021). DOI: http://doi.org/10.1134/S1061920821010052</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>
