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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">dan-451</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>ЧАСТИЧНО НЕРЕГУЛЯРНЫЕ РЕШЕНИЯ ЛИНЕЙНЫХ ПОЧТИ ПЕРИОДИЧЕСКИХ ДИФФЕРЕНЦИАЛЬНЫХ СИСТЕМ В КРИТИЧЕСКОМ РЕЗОНАНСНОМ СЛУЧАЕ</article-title><trans-title-group xml:lang="en"><trans-title>PARTIALLY IRREGULAR SOLUTIONS OF LINEAR ALMOST PERIODIC DIFFERENTIAL SYSTEMS IN THE CRITICAL RESONANCE CASE</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>Белокурский</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Belokursky</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>старший преподаватель</p><p>ул. Советская, 104, 246019</p></bio><bio xml:lang="en"><p>Senior Lecturer</p><p>104, Sovetskaya Str., 246019</p></bio><email xlink:type="simple">drakonsm@ya.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Гомельский государственный университет имени Ф. Скорины, Гомель</institution></aff><aff xml:lang="en"><institution>Francisk Skorina Gomel State University, Gomel</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>17</day><month>12</month><year>2017</year></pub-date><volume>61</volume><issue>5</issue><fpage>16</fpage><lpage>21</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Белокурский М.С., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Белокурский М.С.</copyright-holder><copyright-holder xml:lang="en">Belokursky M.S.</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://doklady.belnauka.by/jour/article/view/451">https://doklady.belnauka.by/jour/article/view/451</self-uri><abstract><p>Получены необходимые и достаточные условия, при выполнении которых линейная почти периодическая дифференциальная система имеет частично нерегулярные почти периодические решения в критическом резонансном случае. </p></abstract><trans-abstract xml:lang="en"><p>The necessary and sufficient conditions, under which a linear almost periodic differential system has partially irregular almost periodic solutions in the critical resonance case, were obtained. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>частично нерегулярные решения</kwd><kwd>линейные дифференциальные системы</kwd><kwd>почти периодические системы</kwd><kwd>критический резонансный случай</kwd></kwd-group><kwd-group xml:lang="en"><kwd>partially irregular solutions</kwd><kwd>linear differential systems</kwd><kwd>almost periodic systems</kwd><kwd>critical resonant case</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">Fink, A. 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