<?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">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">10.18255/1818-1015-2021-2-126-135</article-id><article-id custom-type="elpub" pub-id-type="custom">mais-1483</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>Выделение условий разрешимости NP-полных задач для класса предфрактальных графов</article-title><trans-title-group xml:lang="en"><trans-title>Identification Conditions for the Solvability of NP-complete Problems for the Class of Pre-fractal Graphs</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9791-142X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тимошенко</surname><given-names>Александр Васильевич</given-names></name><name name-style="western" xml:lang="en"><surname>Tymoshenko</surname><given-names>Aleksandr Vasil'evich</given-names></name></name-alternatives><email xlink:type="simple">u567ku78@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3186-3901</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кочкаров</surname><given-names>Расул Ахматович</given-names></name><name name-style="western" xml:lang="en"><surname>Kochkarov</surname><given-names>Rasul Ahmatovich</given-names></name></name-alternatives><email xlink:type="simple">rasul_kochkarov@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3232-5331</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кочкаров</surname><given-names>Азрет Ахматович</given-names></name><name name-style="western" xml:lang="en"><surname>Kochkarov</surname><given-names>Azret Ahmatovich</given-names></name></name-alternatives><email xlink:type="simple">akochkar@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский университет “Московский институт электронной техники”</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research University of Electronic Technology (MIET)</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Финансовый университет при Правительстве РФ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Financial University under the Government of the Russian Federation</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>11</day><month>06</month><year>2021</year></pub-date><volume>28</volume><issue>2</issue><fpage>126</fpage><lpage>135</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тимошенко А.В., Кочкаров Р.А., Кочкаров А.А., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Тимошенко А.В., Кочкаров Р.А., Кочкаров А.А.</copyright-holder><copyright-holder xml:lang="en">Tymoshenko A.V., Kochkarov R.A., Kochkarov A.A.</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/1483">https://www.mais-journal.ru/jour/article/view/1483</self-uri><abstract><p>Современные сетевые системы (группы БПЛА, социальные сети, сетевые производственные цепочки, транспортно-логистические сети, сети связи, криптовалютные сети) отличаются многоэлементностью и динамикой связей между ее элементами. Ряд дискретных задач по построению оптимальных подструктур сетевых систем, описываемых в виде различных классов графов относятся к NP-полным задачам. При этом изменчивость и динамичность структур сетевых систем приводит к «дополнительному» усложнению поиска решения задач дискретной оптимизации. Вместе с тем для некоторых подклассов динамических графов, которыми моделируются структуры сетевых систем, можно выделить условия разрешимости ряда NP-полных задач. К такому подклассу динамических графов относятся предфрактальные графы. В статье исследованы NP-полные задачи на предфрактальных графах: гамильтонов цикл, остов с максимальным числом висячих вершин, монохроматический треугольник, клика, независимое множество. Выделены условия, при которых для некоторых задач возможно получить ответ о существовании и построить полиномиальные (при фиксировании числа вершин затравки) алгоритмы поиска решений.</p></abstract><trans-abstract xml:lang="en"><p>Modern network systems (unmanned aerial vehicles groups, social networks, network production chains, transport and logistics networks, communication networks, cryptocurrency networks) are distinguished by their multi-element nature and the dynamics of connections between its elements. A number of discrete problems on the construction of optimal substructures of network systems described in the form of various classes of graphs are NP-complete problems. In this case, the variability and dynamism of the structures of network systems leads to an "additional" complication of the search for solutions to discrete optimization problems. At the same time, for some subclasses of dynamical graphs, which are used to model the structures of network systems, conditions for the solvability of a number of NP-complete problems can be distinguished. This subclass of dynamic graphs includes pre-fractal graphs. The article investigates NP-complete problems on pre-fractal graphs: a Hamiltonian cycle, a skeleton with the maximum number of pendant vertices, a monochromatic triangle, a clique, an independent set. The conditions under which for some problems it is possible to obtain an answer about the existence and to construct polynomial (when fixing the number of seed vertices) algorithms for finding solutions are identified.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>NP-полные задачи</kwd><kwd>предфрактальные графы</kwd><kwd>дискретные задачи</kwd><kwd>условия разрешимости</kwd></kwd-group><kwd-group xml:lang="en"><kwd>NP-complete problems</kwd><kwd>pre-fractal graphs</kwd><kwd>discrete problems</kwd><kwd>solvability conditions</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. A. Kochkarov, R. A. Kochkarov, and G. G. Malinetskii, “Issues of dynamic graph theory,” Computational Mathematics and Mathematical Physics, vol. 55, no. 9, pp. 1590-1596, 2015.</mixed-citation><mixed-citation xml:lang="en">A. A. Kochkarov, R. A. Kochkarov, and G. G. Malinetskii, “Issues of dynamic graph theory,” Computational Mathematics and Mathematical Physics, vol. 55, no. 9, pp. 1590-1596, 2015.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">S. N. Pupyrev and A. V. Tikhonov, “The Analysis of Complex Networks with Dynamic Graph Visualization,” Modeling and Analysis of Information Systems, vol. 17, no. 1, pp. 117-135, 2010.</mixed-citation><mixed-citation xml:lang="en">S. N. Pupyrev and A. V. Tikhonov, “The Analysis of Complex Networks with Dynamic Graph Visualization,” Modeling and Analysis of Information Systems, vol. 17, no. 1, pp. 117-135, 2010.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Y. A. Belov and S. I. Vovchok, “Generation of a Social Network Graph by Using Apache Spark,” Modeling and Analysis of Information Systems, vol. 23, no. 6, pp. 777-783, 2016.</mixed-citation><mixed-citation xml:lang="en">Y. A. Belov and S. I. Vovchok, “Generation of a Social Network Graph by Using Apache Spark,” Modeling and Analysis of Information Systems, vol. 23, no. 6, pp. 777-783, 2016.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">S. V. Morzhov and V. A. Sokolov, “An Effective Algorithm for Collision Resolution in Security Policy Rules,” Modeling and Analysis of Information Systems, vol. 26, no. 1, pp. 75-89, 2019.</mixed-citation><mixed-citation xml:lang="en">S. V. Morzhov and V. A. Sokolov, “An Effective Algorithm for Collision Resolution in Security Policy Rules,” Modeling and Analysis of Information Systems, vol. 26, no. 1, pp. 75-89, 2019.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">A. M. Kochkarov, V. A. Perepelitsa, and I. V. Sergienko, Recognition of fractal graphs. Algorithmic approach. RAS SAO, 1998.</mixed-citation><mixed-citation xml:lang="en">A. M. Kochkarov, V. A. Perepelitsa, and I. V. Sergienko, Recognition of fractal graphs. Algorithmic approach. RAS SAO, 1998.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">R. A. Kochkarov, “Problems of multicriteria optimization on multi-weighted prefractal graphs,” no. 17, pp. 319-328, 2014.</mixed-citation><mixed-citation xml:lang="en">R. A. Kochkarov, “Problems of multicriteria optimization on multi-weighted prefractal graphs,” no. 17, pp. 319-328, 2014.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">F. Harary, Graph theory. Addison-Wesley Pub. Co., 1969.</mixed-citation><mixed-citation xml:lang="en">F. Harary, Graph theory. Addison-Wesley Pub. Co., 1969.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">M. A. Iordanskii, “Constructive Classification of Graphs,” Modeling and Analysis of Information Systems, vol. 19, no. 4, pp. 144-153, 2012.</mixed-citation><mixed-citation xml:lang="en">M. A. Iordanskii, “Constructive Classification of Graphs,” Modeling and Analysis of Information Systems, vol. 19, no. 4, pp. 144-153, 2012.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">M. R. Garey and D. S. Johnson, Computers and Intractability: A Guide to the Theory of NP-Completeness. W. H. Freeman and Company, 1979.</mixed-citation><mixed-citation xml:lang="en">M. R. Garey and D. S. Johnson, Computers and Intractability: A Guide to the Theory of NP-Completeness. W. H. Freeman and Company, 1979.</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>
