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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">mais</journal-id><journal-title-group><journal-title xml:lang="ru">Моделирование и анализ информационных систем</journal-title><trans-title-group xml:lang="en"><trans-title>Modeling and Analysis of Information Systems</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1818-1015</issn><issn pub-type="epub">2313-5417</issn><publisher><publisher-name>Yaroslavl State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18255/1818-1015-2022-4-372-387</article-id><article-id custom-type="elpub" pub-id-type="custom">mais-1753</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>Algorithms</subject></subj-group></article-categories><title-group><article-title>Полиномиальный алгоритм поиска кратчайшего пути в делимом кратном графе</article-title><trans-title-group xml:lang="en"><trans-title>The Polynomial Algorithm of Finding the Shortest Path in a Divisible Multiple Graph</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0980-2507</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Смирнов</surname><given-names>Александр Валерьевич</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnov</surname><given-names>Alexander Valeryevich</given-names></name></name-alternatives><email xlink:type="simple">alexander_sm@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ярославский государственный университет им. П. Г. Демидова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>P. G. Demidov Yaroslavl 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>18</day><month>12</month><year>2022</year></pub-date><volume>29</volume><issue>4</issue><fpage>372</fpage><lpage>387</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Смирнов А.В., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Смирнов А.В.</copyright-holder><copyright-holder xml:lang="en">Smirnov A.V.</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.mais-journal.ru/jour/article/view/1753">https://www.mais-journal.ru/jour/article/view/1753</self-uri><abstract><p>В статье рассматриваются неориентированные кратные графы произвольной натуральной кратности к &gt; 1. Кратный граф содержит ребра трех типов: обычные, кратные и мультиребра. Ребра последних двух типов представляют собой объединение к связанных ребер, которые соединяют 2 или (к + 1) вершину соответственно. Связанные ребра могут использоваться только согласованно. Если вершина инцидентна кратному ребру, то она может быть инцидентна другим кратным ребрам, а также она может быть общим концом к связанных ребер мультиребра. Если вершина является общим концом мультиребра, то она не может быть общим концом никакого другого мультиребра. Делимые кратные графы характеризуются возможностью выделения к частей, согласованных на связанных ребрах и не содержащих общих ребер. Каждая часть представляет собой обычный граф. Как и для обычного графа, для кратного графа можно ввести целочисленную функцию длины ребра и поставить задачу о кратчайшем пути между двумя вершинами. Кратный путь является объединением к обычных путей, согласованных на связанных ребрах кратных и мультиребер. В статье показано, что задача о кратчайшем пути в делимом кратном графе является полиномиальной. Сформулирован соответствующий полиномиальный алгоритм. Также предложена модификация алгоритма для случая произвольного кратного графа. Эта модификация имеет экспоненциальную по параметру к трудоемкость.</p></abstract><trans-abstract xml:lang="en"><p>In this paper, we study undirected multiple graphs of any natural multiplicity к &gt; 1. There are edges of three types: ordinary edges, multiple edges and multi-edges. Each edge of the last two types is a union of к linked edges, which connect 2 or (к + 1) vertices, correspondingly. The linked edges should be used simultaneously. If a vertex is incident to a multiple edge, it can be also incident to other multiple edges and it can be the common end of к linked edges of some multi-edge. If a vertex is the common end of some multi-edge, it cannot be the common end of another multi-edge. Divisible multiple graphs are characterized by a possibility to divide the graph into к parts, which are adjusted on the linked edges and which have no common edges. Each part is an ordinary graph. As for an ordinary graph, we can define the integer function of the length of an edge for a multiple graph and set the problem of the shortest path joining two vertices. Any multiple path is a union of к ordinary paths, which are adjusted on the linked edges of all multiple and multi-edges. In the article, we show that the problem of the shortest path is polynomial for a divisible multiple graph. The corresponding polynomial algorithm is formulated. Also we suggest the modification of the algorithm for the case of an arbitrary multiple graph. This modification has an exponential complexity in the parameter к.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>кратный граф</kwd><kwd>делимый граф</kwd><kwd>кратный путь</kwd><kwd>кратчайший путь</kwd><kwd>множество достижимости</kwd><kwd>полиномиальный алгоритм</kwd></kwd-group><kwd-group xml:lang="en"><kwd>multiple graph</kwd><kwd>divisible graph</kwd><kwd>multiple path</kwd><kwd>shortest path</kwd><kwd>reachability set</kwd><kwd>polynomial algorithm</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">A. V. Smirnov, "The Shortest Path Problem for a Multiple Graph”, Automatic Control and Computer Sciences, vol. 52, no. 7, pp. 625-633, 2018. doi: 10.3103/S0146411618070234.</mixed-citation><mixed-citation xml:lang="en">A. V. 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