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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 pub-id-type="doi">10.26907/2949-3919.2026.1.7-15</article-id><article-id custom-type="elpub" pub-id-type="custom">matatecs-102</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>Некоторые рассуждения об истоках и современных приложениях геометрии Лобачевского</article-title><trans-title-group xml:lang="en"><trans-title>Некоторые рассуждения об истоках и современных приложениях геометрии Лобачевского</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>Таюрский</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Таюрский</surname><given-names>Д. А.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Дмитрий Альбертович Таюрский</p><p>Ул. Кремлевская, д. 18, Казань, 420008</p></bio><email xlink:type="simple">Dmitry.Tayurskii@kpfu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Казанский (Приволжский) федеральный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Казанский (Приволжский) федеральный университет</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>22</day><month>06</month><year>2026</year></pub-date><volume>4</volume><issue>1</issue><fpage>7</fpage><lpage>15</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Таюрский Д.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Таюрский Д.А.</copyright-holder><copyright-holder xml:lang="en">Таюрский Д.А.</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/102">https://matatecs.elpub.ru/jour/article/view/102</self-uri><abstract><p>По материалам доклада, представленного на Расширенном заседании Ученого Совета КФУ, посвященном 200-летию открытия Н.И. Лобачевским неевклидовой геометрии, 26 февраля 2026 г.</p></abstract><trans-abstract xml:lang="en"><p>По материалам доклада, представленного на Расширенном заседании Ученого Совета КФУ, посвященном 200-летию открытия Н.И. Лобачевским неевклидовой геометрии, 26 февраля 2026 г.</p></trans-abstract></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">А.В. Аганов, М.Х. Салахов, Н.С. Альтшулер, История физики и астрономии в Казанском университете за 200 лет, Изд-во Казан. ун-та, Казань, 2007.</mixed-citation><mixed-citation xml:lang="en">А.В. Аганов, М.Х. Салахов, Н.С. Альтшулер, История физики и астрономии в Казанском университете за 200 лет, Изд-во Казан. ун-та, Казань, 2007.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">P. Fang, M. Harandi, T. Le, D. 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