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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">mathematics</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник российских университетов. Математика</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Universities Reports. Mathematics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2686-9667</issn><issn pub-type="epub">2782-3342</issn><publisher><publisher-name>Тамбовский государственный университет имени Г.Р. Державина</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20310/2686-9667-2019-24-127-252-271</article-id><article-id custom-type="elpub" pub-id-type="custom">mathematics-255</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>СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ARTICLES</subject></subj-group></article-categories><title-group><article-title>Сердцевина матрицы в макс-алгебре и в неотрицательной алгебре: Обзор</article-title><trans-title-group xml:lang="en"><trans-title>Core of a matrix in max algebra and in nonnegative algebra: A survey</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>Буткович</surname><given-names>Петер</given-names></name><name name-style="western" xml:lang="en"><surname>Butkovic</surname><given-names>Peter</given-names></name></name-alternatives><email xlink:type="simple">P.Butkovic@bham.ac.uk</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шнайдер</surname><given-names>Ганс</given-names></name><name name-style="western" xml:lang="en"><surname>Schneider</surname><given-names>Hans</given-names></name></name-alternatives><email xlink:type="simple">hans@math.wisc.edu</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сергеев</surname><given-names>Сергей</given-names></name><name name-style="western" xml:lang="en"><surname>Sergeev</surname><given-names>Sergei</given-names></name></name-alternatives><email xlink:type="simple">sergeevs@maths.bham.ac.uk</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Университет Бирмингема, Школа Математики</institution><country>Россия</country></aff><aff xml:lang="en"><institution>University of Birmingham, School of Mathematics</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Университет Мадисона, штат Висконсин</institution><country>Россия</country></aff><aff xml:lang="en"><institution>University of Wisconsin-Madison</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2019</year></pub-date><pub-date pub-type="epub"><day>23</day><month>10</month><year>2019</year></pub-date><volume>24</volume><issue>127</issue><fpage>252</fpage><lpage>271</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Буткович П., Шнайдер Г., Сергеев С., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Буткович П., Шнайдер Г., Сергеев С.</copyright-holder><copyright-holder xml:lang="en">Butkovic P., Schneider H., Sergeev 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://mathematics.elpub.ru/jour/article/view/255">https://mathematics.elpub.ru/jour/article/view/255</self-uri><abstract><p>Эта статья предлагает краткое введение в теорию Перрона-Фробениуса в макс-алгебре и в неотрицательной линейной алгебре, а также обсуждение результатов, касающихся сердцевин неотрицательных матриц, понимаемых в двух смыслах. Обычная сердцевина неотрицательной матрицы определяется как ∩ k ≥1 span+ (A k ) , то есть как пересечение подпространств, натянутых на неотрицательные столбцы степеней этой матрицы. Этот объект важен для обычной теории Перрона-Фробениуса. Он имеет приложения в эргодической теории. Мы прослеживаем прямую макс-алгебраическую аналогию и проявляем совпадения и различия обеих теорий.</p></abstract><trans-abstract xml:lang="en"><p>This paper presents a light introduction to Perron-Frobenius theory in max algebra and in nonnegative linear algebra, and a survey of results on two cores of a nonnegative matrix. The (usual) core of a nonnegative matrix is defined as ∩ k≥1 span+ (A k ) , that is, intersection of the nonnegative column spans of matrix powers. This object is of importance in the (usual) Perron-Frobenius theory, and it has some applications in ergodic theory. We develop the direct max-algebraic analogue and follow the similarities and differences of both theories.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>макс-алгебра</kwd><kwd>теория неорицательных матриц</kwd><kwd>теория Перрона-Фробениуса</kwd><kwd>степень матрицы</kwd><kwd>собственнное подпространство</kwd><kwd>сердцевина</kwd></kwd-group><kwd-group xml:lang="en"><kwd>max algebra</kwd><kwd>nonnegative matrix theory</kwd><kwd>Perron-Frobenius theory</kwd><kwd>matrix power</kwd><kwd>eigenspace</kwd><kwd>core</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">Н. Н. Воробьев, “Экстремальная алгебра матриц”, Докл. АН СССР, 152:1 (1963), 24-27.</mixed-citation><mixed-citation xml:lang="en">Н. Н. Воробьев, “Экстремальная алгебра матриц”, Докл. 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