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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">najo</journal-id><journal-title-group><journal-title xml:lang="en">Nanosystems: Physics, Chemistry, Mathematics</journal-title><trans-title-group xml:lang="ru"><trans-title>Наносистемы: физика, химия, математика</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2220-8054</issn><issn pub-type="epub">2305-7971</issn><publisher><publisher-name>Университет ИТМО</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17586/2220-8054-2017-8-1-24-28</article-id><article-id custom-type="elpub" pub-id-type="custom">najo-722</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="en"><subject>MATHEMATICS</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МАТЕМАТИКА</subject></subj-group></article-categories><title-group><article-title>Stationary nonlinear Schrӧdinger equation on the graph for the triangle with outgoing bonds</article-title><trans-title-group xml:lang="ru"><trans-title></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Sabirov</surname><given-names>K. K.</given-names></name></name-alternatives><bio xml:lang="en"><p>17 Niyazov Str. 100095 Tashkent</p><p>Amir Temur Str. 108, Tashkent</p></bio><email xlink:type="simple">karimjonsabirov80@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Aripov</surname><given-names>M.</given-names></name></name-alternatives><bio xml:lang="en"><p>University Str. 1, 100174, Tashkent</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="western" xml:lang="en"><surname>Sagdullayev</surname><given-names>D. B.</given-names></name></name-alternatives><bio xml:lang="en"><p>Uzbekistan Str., 49, 100003, Tashkent</p></bio><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff xml:lang="en" id="aff-1"><institution>Turin Polytechnic University in Tashkent; Tashkent University of Information Technologies</institution><country>Uzbekistan</country></aff><aff xml:lang="en" id="aff-2"><institution>Department of Mathematics, National University of Uzbekistan</institution><country>Uzbekistan</country></aff><aff xml:lang="en" id="aff-3"><institution>Department of High Matnematics, Tashkent State University of Economy</institution><country>Uzbekistan</country></aff><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>13</day><month>08</month><year>2025</year></pub-date><volume>8</volume><issue>1</issue><fpage>24</fpage><lpage>28</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Sabirov K.K., Aripov M., Sagdullayev D.B., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Sabirov K.K., Aripov M., Sagdullayev D.B.</copyright-holder><copyright-holder xml:lang="en">Sabirov K.K., Aripov M., Sagdullayev D.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://nanojournal.ifmo.ru/jour/article/view/722">https://nanojournal.ifmo.ru/jour/article/view/722</self-uri><abstract><p>We consider the stationary (cubic) nonlinear Schrӧdinger equation (NLSE) on a simple metric graph in the form of a triangle with three infinite outgoing bonds. Exact solutions are obtained for primary star graph with the boundary vertex conditions providing the wave function weights continuity and flux conservation for the case of repulsive nonlinearity.</p></abstract><kwd-group xml:lang="en"><kwd>Nonlinear Schrӧdinger equation</kwd><kwd>a metric graph</kwd><kwd>repulsive nonlinearity</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work is partially supported by the grant of the Committee for the Coordination Science and Technology Development</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">Sobirov Z., Matrasulov D., Sabirov K., Sawada S., and Nakamura K. Integrable nonlinear Schrӧdinger equation on simple networks: Connection formula at vertices, Phys. Rev. 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