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2009 Fiscal Year Final Research Report

Studies of categories of finitely generated modules over Gorenstein local rings

Research Project

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Project/Area Number 19740008
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Algebra
Research InstitutionShinshu University

Principal Investigator

TAKAHASHI Ryo  Shinshu University, 理学部, 准教授 (40447719)

Project Period (FY) 2007 – 2009
KeywordsGorenstein環 / Cohen-Macaulay環 / 極大Cohen-Macaulay加群 / 全反射加群 / 分解部分圏
Research Abstract

(1) 全反射加群の圏の反変有限性が局所環のGorenstein性を特徴付けることを示した。これはAuslander-Buchweitzの定理の逆に相当する。これを用いて全反射加群の個数の有限性による単純特異点の特徴付けも得た。また,Gorenstein Hensel局所環上の反変有限分解部分圏を完全に分類した。
(2) 正則環の局所化のD加群構造に関するAlvarez-Montaner-Blickle-Lyubeznikの定理と局所コホモロジー加群の素因子に関するHuneke-Sharpの定理を有限F表現型の環に拡張した。

  • Research Products

    (38 results)

All 2010 2009 2008 2007 Other

All Journal Article (18 results) (of which Peer Reviewed: 18 results) Presentation (19 results) Remarks (1 results)

  • [Journal Article] On existence of embeddings into modules of finite homological dimensions2010

    • Author(s)
      Ryo Takahashi; Siamak Yassemi; Yuji Yoshino
    • Journal Title

      Proceedings of the American Mathematical Society 138,no.7

      Pages: 2265-2268

    • Peer Reviewed
  • [Journal Article] Homological aspects of semidualizing modules2010

    • Author(s)
      Ryo Takahashi; Diana White
    • Journal Title

      Mathematica Scandinavica 106,no.1

      Pages: 5-22

    • Peer Reviewed
  • [Journal Article] On localizing subcategories of derived categories2009

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Journal of Mathematics of Kyoto University 49,no.4

      Pages: 771-783

    • Peer Reviewed
  • [Journal Article] A generalization of a theorem of Foxby2009

    • Author(s)
      Tokuji Araya; Ryo Takahashi
    • Journal Title

      Archiv der Mathematik (Basel) 93,no.2

      Pages: 123-127

    • Peer Reviewed
  • [Journal Article] Modules in resolving subcategories which are free on the punctured spectrum2009

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Pacific Journal of Mathematics 241,no.2

      Pages: 347-367

    • Peer Reviewed
  • [Journal Article] Local cohomology based on a nonclosed support defined by a pair of ideals2009

    • Author(s)
      Ryo Takahashi; Yuji Yoshino; Takeshi Yoshizawa
    • Journal Title

      Journal of Pure and Applied Algebra 213,no.4

      Pages: 582-600

    • Peer Reviewed
  • [Journal Article] Classifying subcategories of modules over a commutative noetherian ring2008

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Journal of the London Mathematical Society (2) 78,no.3

      Pages: 767-782

    • Peer Reviewed
  • [Journal Article] On G-regular local rings2008

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Communications in Algebra 36,no.12

      Pages: 4472-4491

    • Peer Reviewed
  • [Journal Article] On vanishing of certain Ext modules2008

    • Author(s)
      Shiro Goto; Futoshi Hayasaka; Ryo Takahashi
    • Journal Title

      Journal of Mathematical Society of Japan 60,no.4

      Pages: 1045-1064

    • Peer Reviewed
  • [Journal Article] Finite Gorenstein representation type implies simple singularity2008

    • Author(s)
      Lars Winther Christensen; Greg Piepmeyer; Janet Striuli; Ryo Takahashi
    • Journal Title

      Advances in Mathematics 218,no.4

      Pages: 1012-1026

    • Peer Reviewed
  • [Journal Article] D-modules over rings with finite F-representation type2008

    • Author(s)
      Shunsuke Takagi; Ryo Takahashi
    • Journal Title

      Mathematical Research Letters 15,no.3

      Pages: 563-581

    • Peer Reviewed
  • [Journal Article] Direct summands of syzygy modules of the residue class field2008

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Nagoya Mathematical Journal 189

      Pages: 1-25

    • Peer Reviewed
  • [Journal Article] On quasi-socle ideals in Gorenstein local rings2008

    • Author(s)
      Shiro Goto; Ryo Takahashi; Naoyuki Matsuoka
    • Journal Title

      Journal of Pure and Applied Algebra 212,no.5

      Pages: 969-980

    • Peer Reviewed
  • [Journal Article] An uncountably infinite number of indecomposable totally reflexive modules2007

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Nagoya Mathematical Journal 187

      Pages: 35-48

    • Peer Reviewed
  • [Journal Article] A characterization of modules locally of finite injective dimension2007

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Proceedings of the American Mathematical Society 135,no.11

      Pages: 3461-3464

    • Peer Reviewed
  • [Journal Article] Totally reflexive modules constructed from smooth projective curves of genus g>=22007

    • Author(s)
      Ryo Takahashi; Kei-ichi Watanabe
    • Journal Title

      Archiv der Mathematik (Basel) 89,no.1

      Pages: 60-67

    • Peer Reviewed
  • [Journal Article] On the number of indecomposable totally reflexive modules2007

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Bulletin of the London Mathematical Society 39,no.3

      Pages: 487-492

    • Peer Reviewed
  • [Journal Article] Contravariantly finite resolving subcategories over commutative rings

    • Author(s)
      Ryo Takahashi
    • Journal Title

      American Journal of Mathematics (to appear)

    • Peer Reviewed
  • [Presentation] On locally free Cohen-Macaulay modules2010

    • Author(s)
      Ryo Takahashi
    • Organizer
      The 5th Japan-Vietnam Joint Seminar on Commutative Algebra
    • Place of Presentation
      Institute of Mathematics, Hanoi, Vietnam, January
    • Year and Date
      20100000
  • [Presentation] 自明でない拡大閉部分圏をもつ環について2010

    • Author(s)
      高橋亮
    • Organizer
      第15回明治大学可換環論セミナー
    • Place of Presentation
      明治大学
    • Year and Date
      2010-02-27
  • [Presentation] 非自明な拡大閉部分圏の存在性について2009

    • Author(s)
      高橋亮
    • Organizer
      岡山大学代数セミナー
    • Place of Presentation
      岡山大学
    • Year and Date
      20091200
  • [Presentation] Cohen-Macaulay加群の安定圏のthick部分圏の分類について2009

    • Author(s)
      高橋亮
    • Organizer
      空間の代数的幾何的モデルとその周辺
    • Place of Presentation
      信州大学
    • Year and Date
      20090900
  • [Presentation] 可換環論の発展-ホモロジカル予想を中心として-2009

    • Author(s)
      高木俊輔;高橋亮
    • Organizer
      第54回代数学シンポジウム
    • Place of Presentation
      明治大学
    • Year and Date
      20090800
  • [Presentation] Thick subcategories of stable categories of Cohen-Macaulay modules, The inaugural Pacific Rim Mathematical Association (PRIMA) Congress2009

    • Author(s)
      Ryo Takahashi
    • Organizer
      University of New South Wales
    • Place of Presentation
      Sydney, Australia
    • Year and Date
      20090700
  • [Presentation] Thick subcategories of stable categories of Cohen-Macaulay modules2009

    • Author(s)
      Ryo Takahashi
    • Organizer
      Summer Seminar on ring theory
    • Place of Presentation
      Osaka Prefecture University
    • Year and Date
      20090600
  • [Presentation] 極大Cohen-Macaulay加群の安定圏のthick部分圏とその応用, 平成19年度文部科学省採択:組織的な大学院教育改革推進プログラム(gp)「社会に数理科学を発信する次世代型人材創発」2009年度mts数理科学教育・理論数理コース2009

    • Author(s)
      高橋亮
    • Organizer
      第三回明治大学可換環論セミナー
    • Place of Presentation
      明治大学
    • Year and Date
      20090400
  • [Presentation] Walks in resolving subcategories2009

    • Author(s)
      Ryo Takahashi
    • Organizer
      The 4th Japan-Vietnam Joint Seminar on Commutative Algebra by and for young mathematicians, Meiji Institute for Advanced Study of Mathematical Sciences
    • Place of Presentation
      Japan
    • Year and Date
      20090200
  • [Presentation] 超曲面上の極大Cohen-Macaulay加群について2009

    • Author(s)
      高橋亮
    • Organizer
      明治大学大学院特別講義
    • Place of Presentation
      明治大学
    • Year and Date
      2009-05-16
  • [Presentation] Resolving subcategories of modules over commutative rings II2008

    • Author(s)
      Ryo Takahashi
    • Organizer
      Workshop on Representation Theory of Algebras 2008
    • Place of Presentation
      Shizuoka University
    • Year and Date
      20080900
  • [Presentation] Resolving subcategories of modules over commutative rings I2008

    • Author(s)
      Ryo Takahashi
    • Organizer
      Workshop on Representation Theory of Algebras 2008
    • Place of Presentation
      Shizuoka University
    • Year and Date
      20080900
  • [Presentation] On modules in resolving subcategories over commutative rings2008

    • Author(s)
      Ryo Takahashi
    • Organizer
      Mini-Symposium on Ring Theory in Connection with Representation Theory and Homological Algebra
    • Place of Presentation
      Osaka Prefecture University
    • Year and Date
      20080700
  • [Presentation] Cohen-Macaulay環の表現論の一般化に向けて2008

    • Author(s)
      高橋亮
    • Organizer
      名古屋大学特別セミナー
    • Year and Date
      20080700
  • [Presentation] Approximating modules by resolving subcategories2008

    • Author(s)
      Ryo Takahashi
    • Organizer
      International Conference Towards Establishing a Cutting-Edge Platform for Commutative Ring Theory in the 21st Century
    • Place of Presentation
      Port Opening Memorial Hall, Yokohama, Japan
    • Year and Date
      20080300
  • [Presentation] Contravariantly finite resolving subcategories of modules2008

    • Author(s)
      Ryo Takahashi
    • Organizer
      CIMPA School and International Conference on Commutative Algebra
    • Place of Presentation
      IIT-Bombay, Mumbai, India, January
    • Year and Date
      20080000
  • [Presentation] Local cohomology with respect to a pair of ideals2007

    • Author(s)
      Ryo Takahashi
    • Organizer
      The Third Japan-Vietnam Joint Seminar on Commutative Algebra
    • Place of Presentation
      Institute of Mathematics, Hanoi, Vietnam
    • Year and Date
      20071200
  • [Presentation] On contravariantly finite subcategories of finitely generated modules2007

    • Author(s)
      Ryo Takahashi
    • Organizer
      The Fifth China-Japan-Korea International Symposium on Ring Theory, National Olympics Meomorial Youth Center (NYC)
    • Place of Presentation
      Tokyo, Japan
    • Year and Date
      20070900
  • [Presentation] ゴレンシュタイン環上の加群圏の反変有限部分圏2007

    • Author(s)
      高橋亮
    • Organizer
      岡山大学数学コロキウム
    • Year and Date
      20070600
  • [Remarks]

    • URL

      http://math.shinshu-u.ac.jp/~takahasi/

URL: 

Published: 2011-06-18   Modified: 2016-04-21  

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