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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">8379</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">Critical Points and Points of a Bifurcation of the Rotating Magnetized Newtonian Polytropic with 0.9 ≤ n ≤ 1.6 Index</article-title><trans-title-group xml:lang="ru"><trans-title>Критические точки и точки бифуркации вращающихся намагниченных ньютоновских политроп с индексом 0,9 ≤ n ≤ 1,6</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zhuravlev</surname><given-names>V V</given-names></name><name xml:lang="ru"><surname>Журавлёв</surname><given-names>Вадим Владимирович</given-names></name></name-alternatives><email>-</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mikheev</surname><given-names>S A</given-names></name><name xml:lang="ru"><surname>Михеев</surname><given-names>Сергей Александрович</given-names></name></name-alternatives><email>sergjan80@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tsvetkov</surname><given-names>V P</given-names></name><name xml:lang="ru"><surname>Цветков</surname><given-names>Виктор Павлович</given-names></name></name-alternatives><email>tsvet@tversu.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Tver State University</institution></aff><aff><institution xml:lang="ru">Тверской государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2014-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2014</year></pub-date><issue>2</issue><issue-title xml:lang="en">NO2 (2014)</issue-title><issue-title xml:lang="ru">№2 (2014)</issue-title><fpage>292</fpage><lpage>294</lpage><history><date date-type="received" iso-8601-date="2016-09-08"><day>08</day><month>09</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="ru">Copyright ©; 2014, Журавлёв В.В., Михеев С.А., Цветков В.П.</copyright-statement><copyright-year>2014</copyright-year><copyright-holder xml:lang="ru">Журавлёв В.В., Михеев С.А., Цветков В.П.</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/8379">https://journals.rudn.ru/miph/article/view/8379</self-uri><abstract xml:lang="en">In this paper, the presence of critical points and bifurcation points of rotating Newtonian polytropes with an index of 0.9 ≤ n ≤ 1.6 has been shown for the first time. The symbolic-numerical calculation error in metric L2 has reached the size of 10                  −5 order. The approximate analytical solution of the problem to the above mentioned accuracy has been set forth. The critical value of polytropic curve index n = nk =1.54665 has been calculated which is the highest one among the critical points and bifurcation points.</abstract><trans-abstract xml:lang="ru">В работе впервые показано наличие критических точек и точек бифуркации у вращающихся ньютоновских политроп с индексом 0,9 ≤ n ≤ 1,6. Погрешность символьночисленных вычислений в метрике L2 составила величину порядка 10                  −5. Построено приближенное аналитическое решение задачи с вышеуказанной степенью точности. Вычислено критическое значение индекса политропы n = nk =1,54665, выше которого точек бифуркации и критических точек нет.</trans-abstract><kwd-group xml:lang="en"><kwd>Newtonian polytropes</kwd><kwd>critical points</kwd><kwd>bifurcation points</kwd><kwd>period jump</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ньютоновская политропа</kwd><kwd>критические точки</kwd><kwd>точки бифуркации</kwd><kwd>скачок периода</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Jeans J. H. Problems of Cosmogony and Stellar Dynamics. Adams Prize Essay for 1917. - Cambridge: University Press, 1919.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>James R. A. The Structure and Stability of Rotating Gas Masses // The Astrophysical Journal. - 1964. - Vol. 140. - Pp. 552-582.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Mikheev S. A., Tsvetkov V. P. 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