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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-468</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>БОЛЬШИЕ БЛОКИ ЖОРДАНА В ОБРАЗАХ УНИПОТЕНТНЫХ ЭЛЕМЕНТОВ НЕПРОСТОГО ПОРЯДКА В НЕПРИВОДИМЫХ ПРЕДСТАВЛЕНИЯХ СПЕЦИАЛЬНОЙ ЛИНЕЙНОЙ И СИМПЛЕКТИЧЕСКОЙ ГРУПП</article-title><trans-title-group xml:lang="en"><trans-title>BIG JORDAN BLOCKS IN THE IMAGES OF UNIPOTENT ELEMENTS OF NONPRIME ORDER IN IRREDUCIBLE REPRESENTATIONS OF SPECIAL LINEAR AND SYMPLECTIC GROUPS</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>Супруненко</surname><given-names>И. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Suprunenko</surname><given-names>Irina D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р физ.-мат. наук, гл. науч. сотрудник</p><p>ул. Сурганова, 11, 220072</p></bio><bio xml:lang="en"><p>D. Sc. (Physics and Mathematics), Chief researcher</p><p>11, Surganov Str., 220072</p></bio><email xlink:type="simple">suprunenko@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, Минск</institution></aff><aff xml:lang="en"><institution>Institute of Mathematics of the National Academy of Sciences of Belarus, Minsk</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>21</day><month>01</month><year>2018</year></pub-date><volume>61</volume><issue>6</issue><fpage>14</fpage><lpage>19</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Супруненко И.Д., 2018</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="ru">Супруненко И.Д.</copyright-holder><copyright-holder xml:lang="en">Suprunenko I.D.</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/468">https://doklady.belnauka.by/jour/article/view/468</self-uri><abstract><p>Для специальных линейных и симплектических групп не слишком малых рангов относительно р над полем нечетной характеристики р и р-ограниченных неприводимых представлений общего вида получены нижние оценки числа блоков Жордана размерности &gt;рs в образах унипотентных элементов порядка ps+1 &gt; p в таких представлениях; эти оценки зависят от ранга группы, характеристики и значения старшего веса представления на максимальном корне группы. Эти результаты нацелены на поиск «редких» классов унипотентных элементов, которые могут быть полезны для решения задач распознавания представлений и линейных групп. </p></abstract><trans-abstract xml:lang="en"><p>For special linear and symplectic groups of not too small ranks with respect to p over a field of an odd characteristic p and p-restricted irreducible representations of а general form, lower estimates for the number of Jordan blocks of size &gt;ps in the images of unipotent elements of order ps+1 &gt; p in such representations are obtained. These estimates depend upon the group rank, the characteristic and the value of the highest weight of the representation on the maximal root of the group. These results are aimed at searching “rare” classes of unipotent elements that can be useful for solving recognition problems for representations and linear groups. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>унипотентные элементы</kwd><kwd>неприводимые представления</kwd><kwd>блоки Жордана</kwd></kwd-group><kwd-group xml:lang="en"><kwd>unipotent elements</kwd><kwd>irreducible representations</kwd><kwd>Jordan blocks</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа поддержана Белорусским республиканским фондом фундаментальных исследования (проект Ф14Р-109).</funding-statement><funding-statement xml:lang="en">Their research is supported by the Belarussian Republican Foundation for Fundamental Research (Project Ф14Р-109).</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">Suprunenko, I. D. 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