<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">10.22405/2226-8383-2026-27-1-97-110</article-id><article-id custom-type="elpub" pub-id-type="custom">cheb-2186</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>О свободных углах 𝑅𝑅-многогранников</article-title><trans-title-group xml:lang="en"><trans-title>On free angles of 𝑅𝑅-polyhedra</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>Субботин</surname><given-names>Владимир Иванович</given-names></name><name name-style="western" xml:lang="en"><surname>Subbotin</surname><given-names>Vladimir Ivanovich</given-names></name></name-alternatives><bio xml:lang="ru"><p>кандидат физико-математических наук</p></bio><bio xml:lang="en"><p>candidate of physical and mathematical sciences</p></bio><email xlink:type="simple">geometry@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Южно-Российский государственный политехнический университет (НПИ) имени М.И.Платова; Донской государственный аграрный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Platov South Russian State polytechnic university (NPI); Don State Agrarian University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>15</day><month>04</month><year>2026</year></pub-date><volume>27</volume><issue>1</issue><fpage>97</fpage><lpage>110</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Субботин В.И., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Субботин В.И.</copyright-holder><copyright-holder xml:lang="en">Subbotin 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://www.chebsbornik.ru/jour/article/view/2186">https://www.chebsbornik.ru/jour/article/view/2186</self-uri><abstract><p>В статье выведены формулы для свободных углов различного порядка 𝑅𝑅-многогранников и приложения найденных соотношений к доказательству полноты списка несоставных 𝑅𝑅-многогранников второго типа с остроугольными ромбическими вершинами. Свободные углы первого порядка — это плоские углы, вершины которых принадлежат ромбическим звёздам 𝑅𝑅-многогранников. Стороны каждого свободного угла первого порядка являются двумя сторонами смежных ромбов ромбической звезды. Ранее автором была найдена связь острых углов ромбов ромбической вершины со с вободными углами первого порядка. Здесь будут установлены связи плоских углов между двумя сторонами правильных многоугольников, подклеенных в свободные углы первого порядка, с острыми углами ромбов. Углы между сторонами правильных граней названы в работе свободными углами второго порядка. Аналогично стороны соседних правильных многоугольников, подклеенных в свободные углы второго порядка, образуют угол, названный свободнымуглом третьего порядка. Рассмотрены все возможные случаи подклеивания одного или двух одинаковых правильных многоугольников в свободные углы, что позволяет установить полноту списка несоставных 𝑅𝑅-многогранников с остроугольными ромбическими вершинами и правильными гранями различного типа.</p></abstract><trans-abstract xml:lang="en"><p>This article derives formulas for free angles of various orders of RR-polytopes and applies the resulting relations to prove the completeness of the list of non-composite RR-polytopes of the second type with acute-angled rhombic vertices. Free angles of the first order are flat angles whose vertices belong to the rhombic stars of the RR-polytopes. The sides of each free angle of the first order are two sides of adjacent rhombi of the rhombic star. Previously, the author found a relationship between the acute angles of the rhombic vertex rhombi and free angles of the first order. Here, we will establish relationships between the flat angles between two sides of regular polygons glued into free angles of the first order and the acute angles of the rhombi.The angles between the sides of regular faces are called free angles of the second order in this article. Similarly, the sides of adjacent regular polygons glued into free angles of the second order form an angle called a free angle of the third order. All possible cases of gluing one or two identical regular polygons into free angles are considered, which makes it possible to establish the completeness of the list of non-composite 𝑅𝑅-polyhedra with acute-angled rhombic vertices and regular faces of various types.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>свободный угол</kwd><kwd>ромбические вершины</kwd><kwd>𝑅𝑅-многогранник</kwd><kwd>звезда ромбической вершины</kwd></kwd-group><kwd-group xml:lang="en"><kwd>free angle</kwd><kwd>rhombic vertices</kwd><kwd>𝑅𝑅-polyhedron</kwd><kwd>rhombic vertex star.</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Coxeter H. S. Regular polytopes. London-NY. 1963.</mixed-citation><mixed-citation xml:lang="en">Coxeter H. S. 1963, Regular polytopes, London-NY.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Деза М., Гришухин В. П., Штогрин М. И. Изометрические полиэдральные подграфы в</mixed-citation><mixed-citation xml:lang="en">Deza M, Grishukhin V.P., Shtogrin M. I. 2008, Isometricheskie poliedralnye podgrafy v</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">гиперкубах и кубических решетках. М.: МЦНМО, 2007.</mixed-citation><mixed-citation xml:lang="en">gipercubach i cubicheskich reshetkach [Scale-Isometric Polytopal Graphs in Hypercubes and</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Емеличев В. А., Ковалёв М. М., Кравцов М. К. Многогранники. Графы. Оптимизация. М.:</mixed-citation><mixed-citation xml:lang="en">Cubic Lattices ], MCNMO, Мoskow.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Наука, 1981.</mixed-citation><mixed-citation xml:lang="en">Emelichev V. А., Kovalev M. M., Kravzov M. K. 1981, Mnogogranniki. Grafi. Optimizacija.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Cromwell P. R. Polyhedra. Cambridge Univ. Press, Cambridge, 1997.</mixed-citation><mixed-citation xml:lang="en">[Polyhedra. Graph. Optimization], Nauka, Мoskow.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Grunbaum B. Regular polyhedra — old and new.// Aequationes mathematicae. 1977. Vol. 16,</mixed-citation><mixed-citation xml:lang="en">Cromwell P. R. 1997, Polyhedra, Cambridge University Press, Cambridge.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">№1-2. P.1-20.</mixed-citation><mixed-citation xml:lang="en">Grunbaum, B. 1977, “Regular polyhedra — old and new“, Aequationes mathematicae, vol. 16,</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Berman M. Regular-faced Convex Polyhedra, // Journal of The Franklin Institute. 1971. Vol.</mixed-citation><mixed-citation xml:lang="en">no.1-2, pp.1-20.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">, №5. P.329-352.</mixed-citation><mixed-citation xml:lang="en">Berman M. 1971, “Regular-faced Convex Polyhedra“, Journal of The Franklin Institute , vol.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Coxeter H. S. Regular and semi-regular polytopes. II, // Mathematische Zeitschrift. 1985. Vol.</mixed-citation><mixed-citation xml:lang="en">, no.5, pp.329-352.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">, №4. P.559–591.</mixed-citation><mixed-citation xml:lang="en">Coxeter H. S. 1985, “Regular and semi-regular polytopes. II“, Mathematische Zeitschrift, vol.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Coxeter H. S. Regular and semi-regular polytopes. III, // Mathematische Zeitschrift. 1988. Vol.</mixed-citation><mixed-citation xml:lang="en">, no.4, pp.559–591.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">, №1. P.3–45.</mixed-citation><mixed-citation xml:lang="en">Coxeter H. S. 1988, “Regular and semi-regular polytopes. III“, Mathematische Zeitschrift, vol.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Jurij Kovic. Centrally symmetric convex polyhedra with regular polygonal faces // Math.</mixed-citation><mixed-citation xml:lang="en">, no.1, pp.3–45.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Commun. 2013. Vol. 18. P. 429—440.</mixed-citation><mixed-citation xml:lang="en">Jurij Kovic. 2013, “Centrally symmetric convex polyhedra with regular polygonal faces“, Math.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Piette B. M. A. G, Kowalczyk A, Heddle J. G. Characterization of near-miss connectivityinvariant</mixed-citation><mixed-citation xml:lang="en">Commun., vol. 18, pp. 429—440.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">homogeneous convex polyhedral cages // Proc. R. Soc., 2022, A 478:20210679.</mixed-citation><mixed-citation xml:lang="en">Piette B. M. A. G, Kowalczyk A, Heddle J. G. 2022,“Characterization of near-miss connectivityinvariant</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Johnson N. W. Convex polyhedra with regular faces // Can. J. Math. 1966. Vol. 18, №1. P.</mixed-citation><mixed-citation xml:lang="en">homogeneous convex polyhedral cages“, Proc. R. Soc., A 478:20210679.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">—200.</mixed-citation><mixed-citation xml:lang="en">Johnson N. W. 1966, “Convex polyhedra with regular faces“, Can. J. Math., vol. 18, №1, pp.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Залгаллер В. А. Выпуклые многогранники с правильными гранями //Зап. научн. сем.</mixed-citation><mixed-citation xml:lang="en">—200.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">ЛОМИ. 1967. Т.2. С.1-220.</mixed-citation><mixed-citation xml:lang="en">Zalgaller V. А. 1967, “Convex polyhedra with regular faces“, Zapiski nauchnych seminarov</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Tupelo-Schneck R. Convex regular-faced polyhedra with conditional edges [Electronic resource]</mixed-citation><mixed-citation xml:lang="en">LOMI, vol. 2, pp.1-220.</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">// URL: http://tupelo-schneck.org/polyhedra (date of treatment: 29.12.2025).</mixed-citation><mixed-citation xml:lang="en">Tupelo-Schneck R. “Convex regular-faced polyhedra with conditional edges [Electronic resource]“,</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Tupelo-Schneck R. Regular-faced polyhedra [Electronic resource] // URL: https://tupeloschneck.</mixed-citation><mixed-citation xml:lang="en">http://tupelo-schneck.org/polyhedra (date of treatment: 29.12.2025).</mixed-citation></citation-alternatives></ref><ref id="cit26"><label>26</label><citation-alternatives><mixed-citation xml:lang="ru">org/polyhedra/background.html. (date of treatment: 29.12.2025).</mixed-citation><mixed-citation xml:lang="en">Tupelo-Schneck R. “Regular-faced polyhedra [Electronic resource]“, https://tupelo-schneck.org/</mixed-citation></citation-alternatives></ref><ref id="cit27"><label>27</label><citation-alternatives><mixed-citation xml:lang="ru">Subbotin V. I. On Two Classes of Polyhedra with Rhombic Vertices. // J. Math. Sci., 2020,</mixed-citation><mixed-citation xml:lang="en">polyhedra/background.html. (date of treatment: 29.12.2025).</mixed-citation></citation-alternatives></ref><ref id="cit28"><label>28</label><citation-alternatives><mixed-citation xml:lang="ru">vol. 251, pp. 531—538.</mixed-citation><mixed-citation xml:lang="en">Subbotin V. I. 2020, “On two classes of polyhedra with rhombic vertices“, J. Math. Sci., vol. 251,</mixed-citation></citation-alternatives></ref><ref id="cit29"><label>29</label><citation-alternatives><mixed-citation xml:lang="ru">Subbotin V. I. О перечислении выпуклых 𝑅𝑅-многогранников // Чебышевский сборник,</mixed-citation><mixed-citation xml:lang="en">pp. 531–538</mixed-citation></citation-alternatives></ref><ref id="cit30"><label>30</label><citation-alternatives><mixed-citation xml:lang="ru">, том 24, вып. 5, с.194–207.</mixed-citation><mixed-citation xml:lang="en">Subbotin V. I. 2023, “On the enumeration of convex 𝑅𝑅-polytopes“, Chebyshevskiy sbornik,</mixed-citation></citation-alternatives></ref><ref id="cit31"><label>31</label><citation-alternatives><mixed-citation xml:lang="ru">Subbotin V. I. On the Composite 𝑅𝑅-Polyhedra of the Second Type // Siberian Mathematical</mixed-citation><mixed-citation xml:lang="en">vol.24, no.6, pp. 194–207.</mixed-citation></citation-alternatives></ref><ref id="cit32"><label>32</label><citation-alternatives><mixed-citation xml:lang="ru">Journal, 2023, vol. 64, no. 2, pp. 500—506.</mixed-citation><mixed-citation xml:lang="en">Subbotin V. I. 2023, “On the Composite 𝑅𝑅-Polyhedra of the Second Type“, Siberian Mathematical</mixed-citation></citation-alternatives></ref><ref id="cit33"><label>33</label><citation-alternatives><mixed-citation xml:lang="ru">Субботин В. И. О О существовании и перечислении 𝑅𝑅-многогранников // Материалы</mixed-citation><mixed-citation xml:lang="en">Journal, vol. 64, no. 2, pp. 500—506.</mixed-citation></citation-alternatives></ref><ref id="cit34"><label>34</label><citation-alternatives><mixed-citation xml:lang="ru">Омской Международной конференции по геометрии и её приложениям. Омск. 2025. С.153-</mixed-citation><mixed-citation xml:lang="en">Subbotin V. I. 2025, “On the existence and enumeration of 𝑅𝑅-polytopes“, Materialy megdunarodnoy</mixed-citation></citation-alternatives></ref><ref id="cit35"><label>35</label><citation-alternatives><mixed-citation xml:lang="ru">konferencii “Omsskaja konferenciya po geometrii i ejo prilogeniyam“, Omsk, pp.153-155.</mixed-citation><mixed-citation xml:lang="en">konferencii “Omsskaja konferenciya po geometrii i ejo prilogeniyam“, Omsk, pp.153-155.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
