<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.3 20210610//EN" "JATS-journalpublishing1-3.dtd">
<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">mais</journal-id><journal-title-group><journal-title xml:lang="ru">Моделирование и анализ информационных систем</journal-title><trans-title-group xml:lang="en"><trans-title>Modeling and Analysis of Information Systems</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1818-1015</issn><issn pub-type="epub">2313-5417</issn><publisher><publisher-name>Yaroslavl State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.18255/1818-1015-2014-2-90-96</article-id><article-id custom-type="elpub" pub-id-type="custom">mais-122</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>Оригинальные 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>Приводимость пространства модулей стабильных рефлексивных пучков ранга 2 с классами Черна c1 = −1, c2 = 4, c3 = 2 на пространстве P3</article-title><trans-title-group xml:lang="en"><trans-title>Reducibility of the Moduli Space of Stable Rank 2 Reflexive Sheaves with Chern Classes c1 = −1, c2 = 4, c3 = 2 on Projective Space P³</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>Тихомиров</surname><given-names>Александр Сергеевич</given-names></name><name name-style="western" xml:lang="en"><surname>Tikhomirov</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>научный сотрудник,</p><p>150000 Россия, г. Ярославль, ул. Республиканская, 108</p></bio><bio xml:lang="en"><p>научный сотрудник ,</p><p>Respublikanskaya st., 108, Yaroslavl, 150000, Russia</p></bio><email xlink:type="simple">astikhomirov@mail.ru</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>Заводчиков</surname><given-names>Михаил Александрович</given-names></name><name name-style="western" xml:lang="en"><surname>Zavodchikov</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>старший преподаватель кафедры геометрии и алгебры,</p><p>150000 Россия, г. Ярославль, ул. Республиканская, 108</p></bio><bio xml:lang="en"><p>старший преподаватель кафедры геометрии и алгебры,</p><p>Respublikanskaya st., 108, Yaroslavl, 150000, Russia</p></bio><email xlink:type="simple">zav-mikhail@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Ярославский государственный педагогический университет им. К.Д. Ушинского</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Yaroslavl State Pedagogical University named after K.D. Ushinsky</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2014</year></pub-date><pub-date pub-type="epub"><day>20</day><month>04</month><year>2014</year></pub-date><volume>21</volume><issue>2</issue><fpage>90</fpage><lpage>96</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Тихомиров А.С., Заводчиков М.А., 2014</copyright-statement><copyright-year>2014</copyright-year><copyright-holder xml:lang="ru">Тихомиров А.С., Заводчиков М.А.</copyright-holder><copyright-holder xml:lang="en">Tikhomirov A.S., Zavodchikov M.A.</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://www.mais-journal.ru/jour/article/view/122">https://www.mais-journal.ru/jour/article/view/122</self-uri><abstract><p>В статье доказывается приводимость пространства MrefP³ (2; −1, 4, 2) модулей стабильных рефлексивных пучков ранга 2 с классами Черна c₁ = −1, c₂ = 4, c₃ = 2 на P³. Это первый пример приводимого пространства в серии пространств модулей стабильных рефлексивных пучков ранга 2 с c₁= −1, c₂ = 4, c₃ = 2m, m = 1, 2, 3, 4, 5, 6, 8. Найдены две неприводимые компоненты этого пространства, имеющие ожидаемую размерность 27, и дается их геометрическое описание посредством конструкции Серра.</p></abstract><trans-abstract xml:lang="en"><p>We prove the reducibility of the moduli space MrefP³(2; −1, 4, 2) of stable rank 2 re- flexive sheaves with Chern classes c₁ = −1, c₂ = 4, c₃ = 2 on projective space P³. This gives the first example of a reducible space in the series of moduli spaces of stable rank 2 reflexive sheaves with Chern classes c₁= −1, c₂ = 4, c₃ = 2m, m = 1, 2, 3, 4, 5, 6, 8. We find two components of the expected dimension 27 of this space and give their geometric description via the Serre construction.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>пространство модулей</kwd><kwd>стабильный рефлексивный пучок</kwd><kwd>конструкция Серра</kwd></kwd-group><kwd-group xml:lang="en"><kwd>moduli space</kwd><kwd>stable reflexive sheaf</kwd><kwd>Serre construction</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Министерство образования и науки Российской Федерации</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">Hartshorne R. Stable reflexive sheaves // Math. Ann. 1980. 254. P. 121–176.</mixed-citation><mixed-citation xml:lang="en">Hartshorne R. Stable reflexive sheaves // Math. Ann. 1980. 254. P. 121–176.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Chang M.-C. Stable rank 2 reflexive sheaves on P³ with small c₂ and applications // Trans. Amer. Math. Soc. 1984. 284, No. 1. P. 57–89.</mixed-citation><mixed-citation xml:lang="en">Chang M.-C. Stable rank 2 reflexive sheaves on P³ with small c₂ and applications // Trans. Amer. Math. Soc. 1984. 284, No. 1. P. 57–89.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Hartshorne R. Stable vector bundles of rank 2 on P₃// Math. Ann. 1978. 238. P. 229–280.</mixed-citation><mixed-citation xml:lang="en">Hartshorne R. Stable vector bundles of rank 2 on P₃// Math. Ann. 1978. 238. P. 229–280.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Okonek C., Schneider M., Spindler H. Vector Bundles on Complex Projective Spaces. Progress in Math., Bd. 3, Birkhäuser, 1980.</mixed-citation><mixed-citation xml:lang="en">Okonek C., Schneider M., Spindler H. Vector Bundles on Complex Projective Spaces. Progress in Math., Bd. 3, Birkhäuser, 1980.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Hartshorne R. Algebraic geometry. Springer. New York, 1977.</mixed-citation><mixed-citation xml:lang="en">Hartshorne R. Algebraic geometry. Springer. New York, 1977.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
