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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">matmess</journal-id><journal-title-group><journal-title xml:lang="ru">Математические заметки СВФУ</journal-title><trans-title-group xml:lang="en"><trans-title>Mathematical notes of NEFU</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2411-9326</issn><issn pub-type="epub">2587-876X</issn><publisher><publisher-name>Северо-Восточный федеральный университет имени М.К. Аммосова</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">matmess-444</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>МАТЕМАТИКА</subject></subj-group></article-categories><title-group><article-title>О СУЩЕСТВОВАНИИ ЕВКЛИДОВОЙ СТРУКТУРЫНАУЗЛЕВОСЬМЕРКАСМОСТОМ</article-title><trans-title-group xml:lang="en"><trans-title>On the existence of Euclidean structure on the figure eight knot with a bridge</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>Медных</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Mednykh</surname><given-names>A. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Медных Александр Дмитриевич</p><p>Институт математики им. С. Л. Соболева СО РАН, пр. Академика Коптюга, 4, Новосибирск 630090;</p><p>Новосибирский гос. университет, ул. Пирогова, 2, Новосибирск 630090 </p></bio><bio xml:lang="en"><p>A. D. MednykhSobolev Institute of MathematicsNovosibirsk State University, Novosibirsk, Russia</p></bio><email xlink:type="simple">mednykh@math.nsc.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Соколова</surname><given-names>Д. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Sokolova</surname><given-names>D. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Соколова Дарья Юрьевна</p><p>Институт математики им. С. Л. Соболева СО РАН, пр. Академика Коптюга, 4, Новосибирск 630090;</p><p>Новосибирский гос. университет, ул. Пирогова, 2, Новосибирск 630090 </p></bio><bio xml:lang="en"><p>D. Yu. SokolovaSobolev Institute of MathematicsNovosibirsk State University, Novosibirsk, Russia</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт математики им. С. Л. Соболева СО РАН;&#13;
Новосибирский гос. университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Sobolev Institute of Mathematics</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>08</day><month>07</month><year>2026</year></pub-date><volume>22</volume><issue>4</issue><fpage>32</fpage><lpage>42</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Медных А.Д., Соколова Д.Ю., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Медных А.Д., Соколова Д.Ю.</copyright-holder><copyright-holder xml:lang="en">Mednykh A.D., Sokolova D.Y.</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://matmess.elpub.ru/jour/article/view/444">https://matmess.elpub.ru/jour/article/view/444</self-uri><abstract><p>Исследуются основные геометрические инварианты евклидова конического многообразия, сингулярным множеством которого является узел «восьмерка» с мостом, а носителем — трехмерная сфера. Получены условия существования указанного многообразия, вычислен его объем и длины сингулярных геодезических.</p></abstract><trans-abstract xml:lang="en"><p>In the present paper the basic geometrical invariants are investigated for the cone-manifold whose underlying space is the three dimensional sphere and the singular set is formed by the figure eight knot with a bridge. The existence of Euclidean structure on the manifold under consideration is established. The volume and the lengths of its singular geodesics are calculated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>коническое многообразие</kwd><kwd>евклидова структура</kwd><kwd>объем</kwd><kwd>узел «восьмерка»</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cone-manifold</kwd><kwd>Euclidean structure</kwd><kwd>volume</kwd><kwd>the figure eight knot</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа первого автора выполнена при финансовой поддержке Российского фонда фундаментальных исследований (код проекта 15–01–07906), второго автора — при финансовой поддержке Российского фонда фундаментальных исследований (код проекта 16–31–00138).</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">P. Koebe Uber die Uniformisierung beliebiger analytischer Kurven // Nachr. Akad. Wiss.¨ Go¨tt., II. Math.-Phys. Kl 1907. 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