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<article article-type="conference-paper" 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 pub-id-type="doi">10.26907/2949-3919.2025.1.26-51</article-id><article-id custom-type="elpub" pub-id-type="custom">matatecs-69</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>Графы тригональных кривых и жесткие изотопии особых вещественных алгебраических кривых бистепени (4, 3) на гиперболоиде</article-title><trans-title-group xml:lang="en"><trans-title>Graphs of trigonal curves and rigid isotopies of singular real algebraic curves of bidegree (4, 3) on a hyperboloid</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>Звонилов</surname><given-names>В. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Zvonilov</surname><given-names>V. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Виктор Иванович Звонилов</p><p>проспект Гагарина, д. 23, г. Н. Новгород, 603950</p></bio><bio xml:lang="en"><p>Victor Ivanovich Zvonilov</p><p>23 Gagarin av., Nizhny Novgorod, 603950</p></bio><email xlink:type="simple">zvonilov@itmm.unn.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Нижегородский государственный университет им. Н.И. Лобачевского</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lobachevsky State University of Nizhny Novgorod</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>02</day><month>05</month><year>2025</year></pub-date><volume>3</volume><issue>1</issue><issue-title>Специальный выпуск трудов конференции «Алгебра и математическая логика: теория и приложения»</issue-title><fpage>26</fpage><lpage>51</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Звонилов В.И., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Звонилов В.И.</copyright-holder><copyright-holder xml:lang="en">Zvonilov V.I.</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/69">https://matatecs.elpub.ru/jour/article/view/69</self-uri><abstract><p>Жесткой изотопией вещественных алгебраических кривых некоторого класса называется путь в пространстве кривых этого класса. В работе завершена жесткая изотопическая классификация неособых вещественных алгебраических кривых бистепени (4,3) на гиперболоиде, начатая автором в более ранних работах. Даны отсутствовавшие доказательства единственности компонент связности 16-ти классов вещественных алгебраических кривых бистепени (4,3), имеющих единственную невырожденную двойную точку или точку возврата. Основным техническим средством являются графы вещественных тригональных кривых на поверхностях Хирцебруха.</p></abstract><trans-abstract xml:lang="en"><p>A rigid isotopy of real algebraic curves of a certain class is a path in the space of curves of this class. Our study completes the rigid isotopic classiﬁcation of nonsingular real algebraic curves of bidegree (4,3) on a hyperboloid, started by the author in his earlier works. Missing proofs of the uniqueness of the connected components for 16 classes of real algebraic curves of bidegree (4,3) having a single node or a cusp are given. The main technical tools are graphs of real trigonal curves on Hirzebruch surfaces.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>пространства вещественных алгебраических кривых</kwd><kwd>кривые на гиперболоиде</kwd><kwd>тригональные кривые</kwd><kwd>вложенные графы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>spaces of real algebraic curves</kwd><kwd>curves on a hyperboloid</kwd><kwd>trigonal curves</kwd><kwd>embedded graphs</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания FSWR-2023-0034</funding-statement><funding-statement xml:lang="en">The work was completed within the framework of a scientiﬁc project of the State assignment FSWR-2023-0034</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">В.И. 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