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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="other" 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">8686</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></subject></subj-group></article-categories><title-group><article-title xml:lang="en">On the Chromatic Numbers of R2 and R3 with an Intervalof Forbidden Distances</article-title><trans-title-group xml:lang="ru"><trans-title>О хроматических числах R2 и R3 с интервалами запрещённых расстояний</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ivanov</surname><given-names>L L</given-names></name><name xml:lang="ru"><surname>Иванов</surname><given-names>Леонид Львович</given-names></name></name-alternatives><bio xml:lang="en">Факультет физико-математических и естественных наук; Российский университет дружбы народов; Peoples Friendship University of Russia</bio><bio xml:lang="ru">Факультет физико-математических и естественных наук; Российский университет дружбы народов</bio><email>l.ivanov@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Peoples Friendship University of Russia</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2011-01-15" publication-format="electronic"><day>15</day><month>01</month><year>2011</year></pub-date><issue>1</issue><issue-title xml:lang="en">NO1 (2011)</issue-title><issue-title xml:lang="ru">№1 (2011)</issue-title><fpage>14</fpage><lpage>29</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 ©; 2011, Иванов Л.Л.</copyright-statement><copyright-year>2011</copyright-year><copyright-holder xml:lang="ru">Иванов Л.Л.</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/8686">https://journals.rudn.ru/miph/article/view/8686</self-uri><abstract xml:lang="en">In this article there defined one of generalization of classical notion of chromatic number of a plane or a space defined, that is chromatic number with an interval of forbidden distances. Some upper bounds are obtained for this value with different intervals and the method of finding these results are described.</abstract><trans-abstract xml:lang="ru">В данной статье представлено одно из обобщений классического понятия хроматического числа плоскости, или пространства, а именно, хроматического числа с интервалом запрещённых расстояний. Были получены верхние оценки для введённой величины при различных интервалах и описан метод получения подобных результатов.</trans-abstract><kwd-group xml:lang="en"><kwd>chromatic number</kwd><kwd>forbidden distance</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>хроматическое число</kwd><kwd>запрещённое расстояние</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Демидович Б. П. Лекции по математической теории устойчивости. - М.: Наука, 1967. - 472 с. [Demidovich B. P. 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