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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">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-2430-2020-56-1-30-35</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-503</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>МАТЕМАТИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>MATHEMATICS</subject></subj-group></article-categories><title-group><article-title>О сильно нерегулярных периодических решениях линейного неоднородного дискретного уравнения первого порядка</article-title><trans-title-group xml:lang="en"><trans-title>On strongly irregular periodic solutions of the linear nonhomogeneous discrete equation of the first order</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>Деменчук</surname><given-names>А. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Demenchuk</surname><given-names>A. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Деменчук Александр Константинович – доктор физико-математических наук, доцент, главный научный сотрудник отдела дифференциальных уравнений</p></bio><bio xml:lang="en"><p>Aleksandr K. Demenchuk – Dr. Sc. (Physics and Mathematics), Assistant Professor, Chief Researcher of the Department of Differential Equations</p><p>11, Surganova Str., Minsk, 220072</p></bio><email xlink:type="simple">demenchuk@im.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт математики Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>03</day><month>04</month><year>2020</year></pub-date><volume>56</volume><issue>1</issue><fpage>30</fpage><lpage>35</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Деменчук А.К., 2020</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="ru">Деменчук А.К.</copyright-holder><copyright-holder xml:lang="en">Demenchuk A.K.</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://vestifm.belnauka.by/jour/article/view/503">https://vestifm.belnauka.by/jour/article/view/503</self-uri><abstract><p>Как уже было доказано ранее (теорема Массеры) скалярное периодическое обыкновенное дифференциальное уравнение первого порядка не имеет сильно нерегулярных периодических решений, т. е. таких, что период решения несоизмерим с периодом уравнения. Для разностных уравнений с дискретным временем сильная нерегулярность означает, что период уравнения является взаимно простым по отношению к периоду его решения. Известно, что в случае дискретных уравнений упомянутый результат полного аналога не имеет.</p><p>Цель настоящей работы – исследовать возможность реализации аналога теоремы Массеры для некоторых классов разностных уравнений. Для этого рассматривается класс линейных разностных уравнений. Доказано, что линейное неоднородное нестационарное периодическое дискретное уравнение первого порядка не имеет сильно нерегулярных периодических решений, отличных от постоянных.</p></abstract><trans-abstract xml:lang="en"><p>As is proved earlier (the Massera theorem), the first-order scalar periodic ordinary differential equation does not have strongly irregular periodic solutions (solutions with a period incommensurable with the period of the equation). For difference equations with discrete time, strong irregularity means that the equation period and the period of its solution are relatively prime numbers. It is known that in the case of discrete equations, the mentioned result has no complete analog.</p><p>The purpose of this paper is to investigate the possibility of realizing an analog of the Massera theorem for certain classes of difference equations. To do this, we consider the class of linear difference equations. It is proved that a linear nonhomogeneous non-stationary periodic discrete equation of the first order does not have strongly irregular non-stationary periodic solutions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>периодические разностные линейные уравнения</kwd><kwd>периодические последовательности</kwd><kwd>сильно нерегулярные периодические решения</kwd></kwd-group><kwd-group xml:lang="en"><kwd>difference linear periodic equations</kwd><kwd>periodic sequences</kwd><kwd>strongly irregular periodic solutions</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в Институте математики Национальной академии наук Беларуси в рамках Отдельного проекта фундаментальных и прикладных научных исследований НАН Беларуси «Исследование свойств спектров дискретных систем при возмущениях их коэффициентов».</funding-statement><funding-statement xml:lang="en">The work was carried out at the Institute of Mathematics of the National Academy of Sciences of Belarus within the framework of the Special Project of Fundamental and Applied Scientific Research of the National Academy of Sciences of Belarus “Investigation of the properties of the spectra of discrete systems under perturbations of their coefficients”.</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">Popenda, J. 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