<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">cheb</journal-id><journal-title-group><journal-title xml:lang="ru">Чебышевский сборник</journal-title><trans-title-group xml:lang="en"><trans-title>Chebyshevskii Sbornik</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2226-8383</issn><publisher><publisher-name>Tula State Lev Tolstoy  Pedagogical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.22405/2226-8383-2023-24-1-69-88</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1474</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><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Article</subject></subj-group></article-categories><title-group><article-title>Первый класс Аппельрота псевдоевклидовой системы Ковалевской</article-title><trans-title-group xml:lang="en"><trans-title>First Appelrot class of pseudo-Euclidean Kovalevskaya system</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>Кибкало</surname><given-names>Владислав Александрович</given-names></name><name name-style="western" xml:lang="en"><surname>Kibkalo</surname><given-names>Vladislav Alexandrovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук</p></bio><bio xml:lang="en"><p>candidate of physical and mathematical sciences</p></bio><email xlink:type="simple">slava.kibkalo@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет им. М. В. Ломоносова; Московский центр фундаментальной и прикладной математики</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University; Moscow Center for Fundamental and Applied Mathematics</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>24</day><month>05</month><year>2023</year></pub-date><volume>24</volume><issue>1</issue><fpage>69</fpage><lpage>88</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Кибкало В.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Кибкало В.А.</copyright-holder><copyright-holder xml:lang="en">Kibkalo V.A.</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://www.chebsbornik.ru/jour/article/view/1474">https://www.chebsbornik.ru/jour/article/view/1474</self-uri><abstract><p>Для интегрируемого псевдоевклидова аналога волчка Ковалевской изучены свойства системы при нулевом уровне дополнительного первого интеграла Ковалевской. Класс движений классического волчка при том же условии называют также первым классом Аппельрота или классом Делоне. Описан класс гомеоморфности каждого слоя, классы послойной гомеоморфности слоения в окрестности бифуркационного слоя (аналог 2-атома Фоменко) и на всем двумерном пересечении уровня 𝐾 = 0 и симплектического листа скобки Пуассона. Показано наличие некомпактных одномерных слоев Лиувилля, некритических перестроек компактных и некомпактных слоев в данной интегрируемой системе. Также изучен вопрос невырожденности (по Ботту) всех точек уровня 𝐾 = 0 и доказано, что критическое множество псевдоевклидова аналога совпадает с таковым для классического волчка.</p></abstract><trans-abstract xml:lang="en"><p>In paper, properties of an integrable pseudo-Euclidean analogue of the Kovalevskaya top are studied for the zero level of the additional first Kovalevskaya integral. The class of motions of a classical top under the same condition is also called the first Appelrot class or the Delaunay class. We describe the homeomorphism class of each fiber, the fiberwise homeomorphism classes of the foliation in a neighborhood of each bifurcation fiber (i.e. analogues of Fomenko 2-atoms) and on the two-dimensional intersection of the level 𝐾 = 0 and each nondegenerate symplectic leaf of the Poisson bracket. It is proved that non-compact one-dimensional Liouville fibers, noncriticalbifurcations of compact and non-compact fibers appear in this integrable system. The non-degeneracy problem (in the Bott sense) for all points of the 𝐾 = 0 level is also studied, and it is proved that the critical sets of the of classical Kovalevskaya top and its pseudo-Euclidean analogue coincides.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>гамильтонова система</kwd><kwd>интегрируемость</kwd><kwd>динамика твердого тела</kwd><kwd>слоение Лиувилля</kwd><kwd>псевдоевклидово пространство</kwd><kwd>бифуркационная диаграмма</kwd><kwd>особенность</kwd><kwd>топологические инвариант.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Hamiltonian system</kwd><kwd>integrability</kwd><kwd>rigid body dynamics</kwd><kwd>Liouville foliation</kwd><kwd>pseudo-Euclidean space</kwd><kwd>bifurcation diagram</kwd><kwd>singularity</kwd><kwd>topological invariant.</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено за счет гранта РФФИ (проект 20-31-90114).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Борисов А. В., Мамаев И. С. Классическая динамика в неевклидовых пространствах —</mixed-citation><mixed-citation xml:lang="en">Borisov, A. V. &amp; Mamaev, I. S. 2004, Classical dynamics in non-Euclidean spaces — Moscow,</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Москва, Ижевск: РХД, 2004.</mixed-citation><mixed-citation xml:lang="en">Izhevsk: R.Ch.D. (in Russian)</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Borisov A. V., Mamaev I. S. Rigid body dynamics in non-Euclidean spaces // Rus. J. of Math.</mixed-citation><mixed-citation xml:lang="en">Borisov, A. V. &amp; Mamaev, I. S. 2016, “Rigid body dynamics in non-Euclidean spaces”, Rus. J.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Phys. 2016. Vol. 23, № 4. P. 431-454.</mixed-citation><mixed-citation xml:lang="en">of Math. Phys., vol. 23, no. 4, pp. 431-454.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Kowalewski S. Sur le probl´eme de la rotation d’un corps solide autour d’un point fixe // Acta</mixed-citation><mixed-citation xml:lang="en">Kowalewski, S. 1889, “Sur le probl´eme de la rotation d’un corps solide autour d’un point fixe”,</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Mathematica. 1889. Vol. 12, P. 177-232.</mixed-citation><mixed-citation xml:lang="en">Acta Mathematica, vol. 12, pp. 177-232.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Соколов С. В. Интегрируемый случай Ковалевской в неевклидовом пространстве: разделение переменных // Труды МАИ. 2018. Т. 100, С. 1-13.</mixed-citation><mixed-citation xml:lang="en">Sokolov, S.V˙ . 2018, “The integrable case of Kovalevskaya in a non-Euclidean spase: separation</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Аппельрот Г. Г. Не вполне симметричные гироскопы // Движение твердого тела вокруг</mixed-citation><mixed-citation xml:lang="en">of variables”, Trydi MAI., vol. 100, pp. 1-13.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">неподвижной точки. — М., 1940.</mixed-citation><mixed-citation xml:lang="en">Appelrot, G. G. 1940, “Ne vpolne simmetrichnye tyazhelye giroskopy”, Dvizhenie tverdogo tela</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Делоне Н. Б. К вопросу о геометрическом истолковании интегралов движения твердого</mixed-citation><mixed-citation xml:lang="en">vokrug nepodvizhnoi tochki, — Izd-vo AN SSSR, M.–L., pp. 61-157.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">тела около неподвижной точки, данных С.В. Ковалевской // Матем. сб. 1892. Т. 16, № 2.</mixed-citation><mixed-citation xml:lang="en">Delaunay, N. B. 1892, “Zur Frage von der geometrischen Deutung der Integrale von S.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">С. 346-351.</mixed-citation><mixed-citation xml:lang="en">Kowalevski bei der Bewegung eines starren K¨𝑜rpers um einen festen Punkte”, Sb. Math., vol.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Smale S. Topology and Mechanics: 1 // Invent. Math. 1970. Vol. 10, № 4. P. 305-331.</mixed-citation><mixed-citation xml:lang="en">, no. 2, pp. 346-351.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Харламов М. П. Топологический анализ интегрируемых задач динамики твердого тела,</mixed-citation><mixed-citation xml:lang="en">Smale, S. 1970, “Topology and Mechanics: 1”, Invent. Math., vol. 10, no. 4, pp. 305-331.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Ленинград: Изд-во Ленинградского Университета 1988.</mixed-citation><mixed-citation xml:lang="en">Kharlamov, M.P. 1988, Topological analysis of integrable problems of rigid body dynamics, LSU</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Фоменко А.Т. Топология поверхностей постоянной энергии некоторых интегрируемых гамильтоновых систем и препятствия к интегрируемости // Изв. АН СССР. Сер. матем.,</mixed-citation><mixed-citation xml:lang="en">Publ., Leningrad, 200 pp.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Т. 50, № 6. С. 1276-1307.</mixed-citation><mixed-citation xml:lang="en">Fomenko, A. T. 1987, “The topology of surfaces of constant energy in integrable Hamiltonian</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Фоменко А.Т., Цишанг Х. Топологический инвариант и критерий эквивалентности ин-</mixed-citation><mixed-citation xml:lang="en">systems, and obstructions to integrability”, Math. USSR-Izv., vol. 29, no. 3, pp. 629-658.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">тегрируемых гамильтоновых систем с двумя степенями свободы // Изв. АН СССР. Сер.</mixed-citation><mixed-citation xml:lang="en">Fomenko, A. T. &amp; Zieschang, H. 1991, “A topological invariant and a criterion for the equivalence</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">матем. 1990. Т. 54, № 3. С. 546-575.</mixed-citation><mixed-citation xml:lang="en">of integrable Hamiltonian systems with two degrees of freedom”, Math. USSR-Izv., vol. 36, no.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Болсинов А. В., Матвеев С. В., Фоменко А.Т. Топологическая классификация интегрируемых гамильтоновых систем с двумя степенями свободы. Список систем малой сложности</mixed-citation><mixed-citation xml:lang="en">, pp. 567-596.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">// УМН. 1990. Т. 45, № 2. С. 49-77.</mixed-citation><mixed-citation xml:lang="en">Bolsinov, A. V., Matveev, S.V. &amp; Fomenko, A. T. 1990, “Topological classification of integrable</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Болсинов А. В., Фоменко А.Т. Интегрируемые гамильтоновы системы. Геометрия, топология, классификация. — Ижевск: РХД, т. 1, 2. 1999.</mixed-citation><mixed-citation xml:lang="en">Hamiltonian systems with two degrees of freedom. List of systems of small complexity”, Russian</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Oshemkov A. A. Fomenko invariants for the main integrable cases of rigid body motion</mixed-citation><mixed-citation xml:lang="en">Math. Surveys, vol. 45, no. 2, pp. 59-94.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">equations, AMS, Vol. 4. P. 67-146. (1991)</mixed-citation><mixed-citation xml:lang="en">Bolsinov, A. V. &amp; Fomenko, A. T. 2004, Integrable Hamiltonian systems: geometry, topology,</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">Bolsinov A. T., Richter P., Fomenko A. T. The method of loop molecules and the topology of</mixed-citation><mixed-citation xml:lang="en">classification, Chapman &amp; Hall /CRC, Boca Raton, London, N.Y., Washington.</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">the Kovalevskaya top // Sb. Math. 2000. Vol. 191, № 2. P. 151-188.</mixed-citation><mixed-citation xml:lang="en">Oshemkov, A. A. 1991, “Fomenko invariants for the main integrable cases of rigid body motion</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">Morozov P. V. The Liouville classification of integrable systems of the Clebsch case // Sb. Math.</mixed-citation><mixed-citation xml:lang="en">equations”, AMS, vol. 4. pp. 67-146.</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Vol. 193, № 10. P. 1507-1533.</mixed-citation><mixed-citation xml:lang="en">Bolsinov, A. T., Richter, P. &amp; Fomenko, A. T. 2000, “The method of loop molecules and the</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">Morozov P. V. Topology of Liouville foliations in the Steklov and the Sokolov integrable cases</mixed-citation><mixed-citation xml:lang="en">topology of the Kovalevskaya top”, Sb. Math., vol. 191, no. 2, pp. 151-188.</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">of Kirchhoff’s equations // Sb. Math. 2004. Vol. 195, № 3. P. 369-412.</mixed-citation><mixed-citation xml:lang="en">Morozov, P. V. 2002, “The Liouville classification of integrable systems of the Clebsch case”, Sb.</mixed-citation></citation-alternatives></ref><ref id="cit32"><label>32</label><citation-alternatives><mixed-citation xml:lang="ru">Logacheva N. S. Classification of nondegenerate equilibria and degenerate 1-dimensional orbits</mixed-citation><mixed-citation xml:lang="en">Math., vol. 193, no. 10, pp. 1507-1533.</mixed-citation></citation-alternatives></ref><ref id="cit33"><label>33</label><citation-alternatives><mixed-citation xml:lang="ru">of the Kovalevskaya-Yehia integrable system // Sb. Math. 2012. Vol. 203, № 1. P. 28-59.</mixed-citation><mixed-citation xml:lang="en">Morozov, P. V. 2004, “Topology of Liouville foliations in the Steklov and the Sokolov integrable</mixed-citation></citation-alternatives></ref><ref id="cit34"><label>34</label><citation-alternatives><mixed-citation xml:lang="ru">Maslov V.P., Shafarevich A. I. Fomenko invariants in the asymptotic theory of the</mixed-citation><mixed-citation xml:lang="en">cases of Kirchhoff’s equations”, Sb. Math., vol. 195, no. 3, pp. 369-412.</mixed-citation></citation-alternatives></ref><ref id="cit35"><label>35</label><citation-alternatives><mixed-citation xml:lang="ru">Navier–Stokes equations // J. Math. Sci. 2017. Vol. 225, № 4. 666-680.</mixed-citation><mixed-citation xml:lang="en">Logacheva, N. S. 2012, “Classification of nondegenerate equilibria and degenerate 1-dimensional</mixed-citation></citation-alternatives></ref><ref id="cit36"><label>36</label><citation-alternatives><mixed-citation xml:lang="ru">Ramodanov S. M., Sokolov S. V. Dynamics of a Circular Cylinder and Two Point Vortices in a</mixed-citation><mixed-citation xml:lang="en">orbits of the Kovalevskaya-Yehia integrable system”, Sb. Math., vol. 203, no. 1, pp. 28-59.</mixed-citation></citation-alternatives></ref><ref id="cit37"><label>37</label><citation-alternatives><mixed-citation xml:lang="ru">Perfect Fluid // Regul. Chaotic Dyn. 2021. Vol. 26, № 6. P. 675-691.</mixed-citation><mixed-citation xml:lang="en">Maslov V.P. &amp; Shafarevich, A. I. 2017, “Fomenko invariants in the asymptotic theory of the</mixed-citation></citation-alternatives></ref><ref id="cit38"><label>38</label><citation-alternatives><mixed-citation xml:lang="ru">Palshin G.P. On noncompact bifurcation in one generalized model of vortex dynamics // Theor.</mixed-citation><mixed-citation xml:lang="en">Navier–Stokes equations”, J. Math. Sci., vol. 225, no. 4, pp. 666-680.</mixed-citation></citation-alternatives></ref><ref id="cit39"><label>39</label><citation-alternatives><mixed-citation xml:lang="ru">Math. Phys. 2022. Vol. 212, № 1. P. 972-983. https://doi.org/10.1134/S0040577922070078</mixed-citation><mixed-citation xml:lang="en">Ramodanov S. M. &amp; Sokolov, S. V. 2021, “Dynamics of a Circular Cylinder and Two Point</mixed-citation></citation-alternatives></ref><ref id="cit40"><label>40</label><citation-alternatives><mixed-citation xml:lang="ru">Haghighatdoost G., Oshemkov A. A. The topology of Liouville foliation for the Sokolov</mixed-citation><mixed-citation xml:lang="en">Vortices in a Perfect Fluid”, Regul. Chaotic Dyn., vol. 26, no. 6, pp. 675-691.</mixed-citation></citation-alternatives></ref><ref id="cit41"><label>41</label><citation-alternatives><mixed-citation xml:lang="ru">integrable case on the Lie algebra so(4) // Sb. Math. 2009. Vol. 200, № 6. 899-921.</mixed-citation><mixed-citation xml:lang="en">Palshin, G.P. 2022, “On noncompact bifurcation in one generalized model of vortex dynamics”,</mixed-citation></citation-alternatives></ref><ref id="cit42"><label>42</label><citation-alternatives><mixed-citation xml:lang="ru">Новиков Д. В. Топологические особенности интегрируемого случая Соколова на алгебре</mixed-citation><mixed-citation xml:lang="en">Theor. Math. Phys., vol. 212, no. 1, pp. 972-983. https://doi.org/10.1134/S0040577922070078</mixed-citation></citation-alternatives></ref><ref id="cit43"><label>43</label><citation-alternatives><mixed-citation xml:lang="ru">Ли so(3,1) // Матем. сб. 2014. Т. 205, № 8. 41-66.</mixed-citation><mixed-citation xml:lang="en">Haghighatdoost, G. &amp; Oshemkov, A. A. 2009, “The topology of Liouville foliation for the Sokolov</mixed-citation></citation-alternatives></ref><ref id="cit44"><label>44</label><citation-alternatives><mixed-citation xml:lang="ru">Komarov I.V. Kowalewski basis for the hydrogen atom // Theoret. and Math. Phys. 1981. Vol.</mixed-citation><mixed-citation xml:lang="en">integrable case on the Lie algebra so(4)”, Sb. Math., vol. 200, no. 6, pp. 899-921</mixed-citation></citation-alternatives></ref><ref id="cit45"><label>45</label><citation-alternatives><mixed-citation xml:lang="ru">, № 1. P. 320-324. https://doi.org/10.1007/BF01017022</mixed-citation><mixed-citation xml:lang="en">Novikov, D. V. 2014, “Топологические особенности интегрируемого случая Соколова на ал-</mixed-citation></citation-alternatives></ref><ref id="cit46"><label>46</label><citation-alternatives><mixed-citation xml:lang="ru">Kozlov I. K. The topology of the Liouville foliation for the Kovalevskaya integrable case on the</mixed-citation><mixed-citation xml:lang="en">гебре Ли so(3,1)”, Sb. Math., vol. 205, no. 8, pp. 1107-1132.</mixed-citation></citation-alternatives></ref><ref id="cit47"><label>47</label><citation-alternatives><mixed-citation xml:lang="ru">Lie algebra so(4) // Sb. Math. 2014. Vol. 205, № 4. P. 532-572.</mixed-citation><mixed-citation xml:lang="en">Kozlov, I. K. 2014, “The topology of the Liouville foliation for the Kovalevskaya integrable case</mixed-citation></citation-alternatives></ref><ref id="cit48"><label>48</label><citation-alternatives><mixed-citation xml:lang="ru">Kibkalo V. A. Topological analysis of the Liouville foliation for the Kovalevskaya integrable case</mixed-citation><mixed-citation xml:lang="en">on the Lie algebra so(4)”, Sbornik: Mathematics, vol. 205, no. 4, pp. 532-572.</mixed-citation></citation-alternatives></ref><ref id="cit49"><label>49</label><citation-alternatives><mixed-citation xml:lang="ru">on the Lie algebra so(4) // Lobachevskii J. Math. 2018. Vol. 39, № 9. P. 1396-1399.</mixed-citation><mixed-citation xml:lang="en">Kibkalo, V. A. 2018, “Topological analysis of the Liouville foliation for the Kovalevskaya</mixed-citation></citation-alternatives></ref><ref id="cit50"><label>50</label><citation-alternatives><mixed-citation xml:lang="ru">Kibkalo V. A. Topological classification of Liouville foliations for the Kovalevskaya integrable</mixed-citation><mixed-citation xml:lang="en">integrable case on the Lie algebra so(4)”, Lobachevskii J. Math., vol. 39, no. 9, pp. 1396-1399.</mixed-citation></citation-alternatives></ref><ref id="cit51"><label>51</label><citation-alternatives><mixed-citation xml:lang="ru">case on the Lie algebra so(4) // Sb. Math. 2019. Vol. 210, № 5. P. 625-662.</mixed-citation><mixed-citation xml:lang="en">Kibkalo, V. A. 2019, “Topological classification of Liouville foliations for the Kovalevskaya</mixed-citation></citation-alternatives></ref><ref id="cit52"><label>52</label><citation-alternatives><mixed-citation xml:lang="ru">Kibkalo V. A.: Topological classification of Liouville foliations for the Kovalevskaya integrable</mixed-citation><mixed-citation xml:lang="en">integrable case on the Lie algebra so(4)”, Sb. Math., vol. 210, no. 5, pp. 625-662.</mixed-citation></citation-alternatives></ref><ref id="cit53"><label>53</label><citation-alternatives><mixed-citation xml:lang="ru">case on the Lie algebra so(3, 1) // Topol. and Appl. 2020, Vol. 275, № 107028. https://doi.org/</mixed-citation><mixed-citation xml:lang="en">Kibkalo, V. A. 2020, “Topological classification of Liouville foliations for the Kovalevskaya</mixed-citation></citation-alternatives></ref><ref id="cit54"><label>54</label><citation-alternatives><mixed-citation xml:lang="ru">/10.1016/j.topol.2019.107028</mixed-citation><mixed-citation xml:lang="en">integrable case on the Lie algebra so(3, 1)”, Topol. and Appl., vol. 275, no. 107028.</mixed-citation></citation-alternatives></ref><ref id="cit55"><label>55</label><citation-alternatives><mixed-citation xml:lang="ru">Fedoseev D. A., Fomenko A. T. Noncompact Bifurcations of Integrable Dynamic Systems // J.</mixed-citation><mixed-citation xml:lang="en">Komarov, I. V. 1981, “Kowalewski basis for the hydrogen atom”, Theoret. and Math. Phys., vol.</mixed-citation></citation-alternatives></ref><ref id="cit56"><label>56</label><citation-alternatives><mixed-citation xml:lang="ru">Math. Sc. 2020. Vol. 248. P. 810-827.</mixed-citation><mixed-citation xml:lang="en">, no. 1, pp. 320-324. https://doi.org/10.1007/BF01017022</mixed-citation></citation-alternatives></ref><ref id="cit57"><label>57</label><citation-alternatives><mixed-citation xml:lang="ru">Кудрявцева Е. А. Аналог теоремы Лиувилля для интегрируемых гамильтоновых систем с</mixed-citation><mixed-citation xml:lang="en">Fedoseev, D. A. &amp; Fomenko, A. T. 2020, “Noncompact Bifurcations of Integrable Dynamic</mixed-citation></citation-alternatives></ref><ref id="cit58"><label>58</label><citation-alternatives><mixed-citation xml:lang="ru">неполными потоками // ДАН. 2012. Т. 445, № 4. С. 383-385.</mixed-citation><mixed-citation xml:lang="en">Systems”, J. Math. Sc., vol. 248, pp. 810-827.</mixed-citation></citation-alternatives></ref><ref id="cit59"><label>59</label><citation-alternatives><mixed-citation xml:lang="ru">Новиков Д. В. Топологические особенности интегрируемого случая Соколова на алгебре</mixed-citation><mixed-citation xml:lang="en">Kudryavtseva, E. A. 2012, “An analogue of the Liouville theorem for integrable Hamiltonian</mixed-citation></citation-alternatives></ref><ref id="cit60"><label>60</label><citation-alternatives><mixed-citation xml:lang="ru">Ли e(3) // Матем. сб. 2011. Т. 202, № 5. С. 127-160.</mixed-citation><mixed-citation xml:lang="en">systems with incomplete flows”, Doklady Mathematics, vol. 86, no. 1, pp. 527-529.</mixed-citation></citation-alternatives></ref><ref id="cit61"><label>61</label><citation-alternatives><mixed-citation xml:lang="ru">Николаенко С. С. Топологическая классификация гамильтоновых систем на двумерных</mixed-citation><mixed-citation xml:lang="en">Novikov, D. V. 2011, “Topological features of the Sokolov integrable case on the Lie algebra</mixed-citation></citation-alternatives></ref><ref id="cit62"><label>62</label><citation-alternatives><mixed-citation xml:lang="ru">некомпактных многообразиях // Матем. сб. 2020. Т. 211, № 8. С. 68-101.</mixed-citation><mixed-citation xml:lang="en">e(3)”, Sb. Math., vol. 202, no. 5, pp. 749-781.</mixed-citation></citation-alternatives></ref><ref id="cit63"><label>63</label><citation-alternatives><mixed-citation xml:lang="ru">Николаенко С. С. Топологическая классификация некомпактных 3-атомов с действием</mixed-citation><mixed-citation xml:lang="en">Nikolaenko, S. S. 2020, “Topological classification of Hamiltonian systems on two-dimensional</mixed-citation></citation-alternatives></ref><ref id="cit64"><label>64</label><citation-alternatives><mixed-citation xml:lang="ru">окружности // Чебышевский сб. 2021. Т. 22, № 5. С. 185-197.</mixed-citation><mixed-citation xml:lang="en">noncompact manifolds”, Sb. Math., vol. 211, no. 8, pp. 1127-1158.</mixed-citation></citation-alternatives></ref><ref id="cit65"><label>65</label><citation-alternatives><mixed-citation xml:lang="ru">Nikolaenko S. S. Topological classification of the Goryachev integrable systems in the rigid body</mixed-citation><mixed-citation xml:lang="en">Nikolaenko, S. S. 2021, “Topological classification of non-compact 3-atoms with a circle action”,</mixed-citation></citation-alternatives></ref><ref id="cit66"><label>66</label><citation-alternatives><mixed-citation xml:lang="ru">dynamics: non-compact case // Lobachevskii J. Math., 2017. Vol. 38. С. 1050-1060.</mixed-citation><mixed-citation xml:lang="en">Chebyshevskii Sb., vol. 22, no. 5, pp. 185-197.</mixed-citation></citation-alternatives></ref><ref id="cit67"><label>67</label><citation-alternatives><mixed-citation xml:lang="ru">Ведюшкина (Фокичева) В. В., Фоменко А.Т. Интегрируемые топологические биллиарды и</mixed-citation><mixed-citation xml:lang="en">Nikolaenko, S. S. 2017, “Topological classification of the Goryachev integrable systems in the</mixed-citation></citation-alternatives></ref><ref id="cit68"><label>68</label><citation-alternatives><mixed-citation xml:lang="ru">эквивалентные динамические системы // Изв. РАН. Сер. матем. 2017. Т. 81, № 4. С. 20-67.</mixed-citation><mixed-citation xml:lang="en">rigid body dynamics: non-compact case”, Lobachevskii J. Math., vol. 38, pp. 1050-1060.</mixed-citation></citation-alternatives></ref><ref id="cit69"><label>69</label><citation-alternatives><mixed-citation xml:lang="ru">Ведюшкина В. В., Скворцов А. И. Топология интегрируемого бильярда в эллипсе на плоскости Минковского с гуковским потенциалом // Вестн. Моск. ун-та. Сер. 1. Матем., мех.</mixed-citation><mixed-citation xml:lang="en">Vedyushkina (Fokicheva), V. V. &amp; Fomenko, A. T. 2017, “Integrable topological billiards and</mixed-citation></citation-alternatives></ref><ref id="cit70"><label>70</label><citation-alternatives><mixed-citation xml:lang="ru">№ 1. С. 8-19.</mixed-citation><mixed-citation xml:lang="en">equivalent dynamical systems”, Izv. Math., vol. 81, no. 4, pp. 688-733.</mixed-citation></citation-alternatives></ref><ref id="cit71"><label>71</label><citation-alternatives><mixed-citation xml:lang="ru">Kibkalo V. A. Noncompactness property of fibers and singularities of non-Euclidean</mixed-citation><mixed-citation xml:lang="en">Vedyushkina, V. V. &amp; Skvortsov, A. I. 2022, “Topology of integrable billiard in an ellipse on the</mixed-citation></citation-alternatives></ref><ref id="cit72"><label>72</label><citation-alternatives><mixed-citation xml:lang="ru">Kovalevskaya system on pencil of Lie algebras // Moscow Univ. Math. Bull., 2020. Vol. 75, №</mixed-citation><mixed-citation xml:lang="en">Minkowski plane with the Hooke potential”, Vestnik Moskov. Univ. Ser. 1. Mat. Mekh., vol. 77,</mixed-citation></citation-alternatives></ref><ref id="cit73"><label>73</label><citation-alternatives><mixed-citation xml:lang="ru">P. 263-267.</mixed-citation><mixed-citation xml:lang="en">no. 1, pp. 8-19.</mixed-citation></citation-alternatives></ref><ref id="cit74"><label>74</label><citation-alternatives><mixed-citation xml:lang="ru">Харламов M.P. Топологический анализ и булевы функции: I. Методы и приложения к</mixed-citation><mixed-citation xml:lang="en">Kibkalo, V. A. 2020, “Noncompactness property of fibers and singularities of non-Euclidean</mixed-citation></citation-alternatives></ref><ref id="cit75"><label>75</label><citation-alternatives><mixed-citation xml:lang="ru">классическим системам // Нелинейная динамика, 2010. Т. 6, № 4. С. 769-805.</mixed-citation><mixed-citation xml:lang="en">Kovalevskaya system on pencil of Lie algebras”, Moscow Univ. Math. Bull., vol. 75, no. 6, pp.</mixed-citation></citation-alternatives></ref><ref id="cit76"><label>76</label><citation-alternatives><mixed-citation xml:lang="ru">-267.</mixed-citation><mixed-citation xml:lang="en">-267.</mixed-citation></citation-alternatives></ref><ref id="cit77"><label>77</label><citation-alternatives><mixed-citation xml:lang="ru">Kharlamov, M.P. 2010, “Topological analysis and Boolean functions. I. Methods and application</mixed-citation><mixed-citation xml:lang="en">Kharlamov, M.P. 2010, “Topological analysis and Boolean functions. I. Methods and application</mixed-citation></citation-alternatives></ref><ref id="cit78"><label>78</label><citation-alternatives><mixed-citation xml:lang="ru">to classical systems”, Nelin. Dinam., vol. 6, no. 4. pp. 769-805.</mixed-citation><mixed-citation xml:lang="en">to classical systems”, Nelin. Dinam., vol. 6, no. 4. pp. 769-805.</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>
