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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">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">10.22405/2226-8383-2022-23-3-5-18</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-1339</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>Метрический сегмент в классе Громова — Хаусдорфа</article-title><trans-title-group xml:lang="en"><trans-title>Metric Segments in Gromov–Hausdorff class</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>Борисова</surname><given-names>Ольга Борисовна</given-names></name><name name-style="western" xml:lang="en"><surname>Borisova</surname><given-names>Olga Borisovna</given-names></name></name-alternatives><email xlink:type="simple">olyaboricova@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 имени М. В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>19</day><month>12</month><year>2022</year></pub-date><volume>23</volume><issue>3</issue><fpage>5</fpage><lpage>18</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Борисова О.Б., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Борисова О.Б.</copyright-holder><copyright-holder xml:lang="en">Borisova O.B.</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/1339">https://www.chebsbornik.ru/jour/article/view/1339</self-uri><abstract><p>В этой статье изучаются свойства метрического сегмента в классе всех метрических пространств, рассматриваемых с точностью до изометрии, с расстоянием Громова — Хаусдорфа. При ограничении на компактные метрические пространства, расстояние Громова — Хаусдорфа становится метрикой. Метрическим сегментом называется класс точек, лежащих между двумя данными. По аксиоматике теории множеств фон Неймана — Бернайса — Гёделя (NGB) собственный класс — это такое «огромное семейство», эквивалентное классу всех множеств, которое уже само множеством не является. В этой статье показано, что любой метрический сегмент в классе Громова — Хаусдорфа, при условии, что существуетхотя бы одно метрическое пространство, лежащее на ненулевых расстояниях до концевых точек сегмента, является собственным классом. А сегмент, у которого расстояние между концевыми точками равно нулю — множество. Также доказано, что при ограничении на компактные метрические пространства невырожденный метрический сегмент не являетсякомпактным множеством.</p></abstract><trans-abstract xml:lang="en"><p>We study properties of metric segments in the class of all metric spaces considered up to an isometry, endowed with Gromov–Hausdorff distance. On the isometry classes of all compactmetric spaces, the Gromov-Hausdorff distance is a metric. A metric segment is a class that consists of points lying between two given ones. By von Neumann–Bernays–G¨odel (NBG) axiomatic set theory, a proper class is a “monster collection”, e.g., the collection of all sets.We prove that any metric segment in the proper class of isometry classes of all metric spaces with the Gromov-Hausdorff distance is a proper class if the segment contains at least one metricspace at positive distances from the segment endpoints. If the distance between the segment endpoints is zero, then the metric segment is a set. In addition, we show that the restriction ofa non-degenerated metric segment to compact metric spaces is a non-compact set.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Расстояние Громова — Хаусдорфа</kwd><kwd>класс всех метрических про- странств</kwd><kwd>аксиоматика фон-Неймана — Бернайса — Гёделя</kwd><kwd>метрический сегмент</kwd><kwd>ком- пактность.</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Gromov–Hausdorff distance</kwd><kwd>class of all metric spaces</kwd><kwd>von Neumann–Bernays– G¨odel axioms</kwd><kwd>metric segment</kwd><kwd>compact set.</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено за счет гранта Российского фонда фундаментальных исследований (проект №19- 01-00775а) и стипендии Фонда развития теоретической физики и математики «БАЗИС» (грант №20-8-2-8-1).</funding-statement><funding-statement xml:lang="en">The study was performed under the support of the Russian Foundation for Basic Research (project №19-01- 00775а) and the scholarship of the Theoretical Physics and Mathematics Advancement Foundation «BASIS» (grant №20-8-2-8-1).</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">Hausdorff F. 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