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2013 Fiscal Year Research-status Report

可換環の加群圏・導来圏・特異圏の構造解析

Research Project

Project/Area Number 25400038
Research Category

Grant-in-Aid for Scientific Research (C)

Research InstitutionNagoya University

Principal Investigator

高橋 亮  名古屋大学, 多元数理科学研究科, 准教授 (40447719)

Project Period (FY) 2013-04-01 – 2016-03-31
Keywords加群圏 / 導来圏 / 特異圏 / 分解部分圏 / Cohen-Macaulay加群 / thick部分圏 / Cohen-Macaulay環 / Gorenstein環
Research Abstract

当該研究者は可換環論の表現論的側面を研究している。すなわち、可換Noether環上の有限生成加群全体のなす圏(以下、加群圏)の構造、およびそれの有界導来圏(以下、導来圏)やBuchweitz, Orlovが導入したsingularity category(以下、特異圏)といった三角圏の構造を解析している。より具体的には、全反射加群に関する研究を経て獲得した数多くの知見をもとに、加群圏の分解部分圏および導来圏・特異圏のthick部分圏の分類研究を行っている。部分圏の分類問題は、環論、代数幾何学、安定ホモトピー論、モジュラー表現論が共有する問題であり、Bondal-Van den Bergh, RouquierおよびDaoと当該研究者が導入した三角圏・Abel圏の部分圏の次元の概念が密接に関わる。本研究では、分解部分圏およびthick部分圏の完全分類を目指すとともに、それらの次元に関する研究を推し進めていく。
平成25年度は以下の成果を得た。
① 与えられた加群に対し、ある元の列に関するKoszulホモロジーを取り、それから元の加群を再構成する方法を見出し、加群圏・導来圏・特異圏の生成に応用した。
② 加群圏の部分圏の半径という不変量を導入し、その有限性を環の特異点としての性質に関連付けた。
③ グレード一致関数という素イデアルスペクトラム上の自然数値関数を導入し、分解部分圏の分類に応用した。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

研究実績の概要欄で述べた成果①および②により加群圏・導来圏・特異圏の次元の有限性に関する情報が、③により分解部分圏・thick部分圏の分類に関する新たな知見が得られた。

Strategy for Future Research Activity

今後は加群圏・導来圏・特異圏の構造についてさらに考察を深めていく。より具体的には、コホモロジー(Ext関手)の零化イデアルおよび加群圏の部分圏のFrobenius構造を調べる。

Expenditure Plans for the Next FY Research Funding

研究課題に大きくかかわる外国出張および国内出張が平成26年度に複数件入ることが平成25年度中に判明した。
前述の外国出張および国内出張の旅費として計上する。

  • Research Products

    (20 results)

All 2015 2014 2013 Other

All Journal Article (13 results) (of which Peer Reviewed: 13 results,  Acknowledgement Compliant: 5 results) Presentation (6 results) (of which Invited: 6 results) Remarks (1 results)

  • [Journal Article] Non-commutative resolutions and Grothendieck groups2015

    • Author(s)
      Hailong Dao; Osamu Iyama; Ryo Takahashi; Charles Vial
    • Journal Title

      Journal of Noncommutative Geometry

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] The radius of a subcategory of modules2014

    • Author(s)
      Hailong Dao; Ryo Takahashi
    • Journal Title

      Algebra and Number Theory

      Volume: 8 Pages: 141-172

    • DOI

      10.2140/ant.2014.8-1

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Reconstruction from Koszul homology and applications to module and derived categories2014

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Pacific Journal of Mathematics

      Volume: 268 Pages: 231-248

    • DOI

      10.2140/pjm.2014.268.231

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Brauer-Thrall for totally reflexive modules over local rings of higher dimension2014

    • Author(s)
      Olgur Celikbas; Mohsen Gheibi; Ryo Takahashi
    • Journal Title

      Algebras and Representation Theory

      Volume: 17 Pages: 997-1008

    • DOI

      10.1007/s10468-013-9432-0

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Modules that detect finite homological dimensions2014

    • Author(s)
      Olgur Celikbas; Hailong Dao; Ryo Takahashi
    • Journal Title

      Kyoto Journal of Mathematics

      Volume: 54 Pages: 295-310

    • DOI

      10.1215/21562261-2642404

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Ulrich ideals and modules2014

    • Author(s)
      Shiro Goto; Kazuho Ozeki; Ryo Takahashi; Kei-ichi Watanabe; Ken-ichi Yoshida
    • Journal Title

      Mathematical Proceedings of the Cambridge Philosophical Society

      Volume: 156 Pages: 137--166

    • DOI

      10.1017/S0305004113000571

    • Peer Reviewed
  • [Journal Article] Dimensions of triangulated categories with respect to subcategories2014

    • Author(s)
      Takuma Aihara; Tokuji Araya; Osamu Iyama; Ryo Takahashi; Michio Yoshiwaki
    • Journal Title

      Journal of Algebra

      Volume: 399 Pages: 205-219

    • DOI

      10.1016/j.jalgebra.2013.09.035

    • Peer Reviewed
  • [Journal Article] Building modules from the singular locus2014

    • Author(s)
      Jesse Burke; Lars Winther Christensen; Ryo Takahashi
    • Journal Title

      Mathematica Scandinavica

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Classification of resolving subcategories and grade consistent functions2014

    • Author(s)
      Hailong Dao; Ryo Takahashi
    • Journal Title

      International Mathematics Research Notices

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] Classifying resolving subcategories over a Cohen-Macaulay local ring2013

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Mathematische Zeitschrift

      Volume: 273 Pages: 569-587

    • DOI

      10.1007/s00209-012-1020-1

    • Peer Reviewed
  • [Journal Article] Thick subcategories over Gorenstein local rings that are locally hypersurfaces on the punctured spectra2013

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Journal of Mathematical Society of Japan

      Volume: 65 Pages: 357-374

    • DOI

      10.2969/jmsj/06520357

    • Peer Reviewed
  • [Journal Article] Tilting and cluster tilting for quotient singularities2013

    • Author(s)
      Osamu Iyama; Ryo Takahashi
    • Journal Title

      Mathematische Annalen

      Volume: 356 Pages: 1065-1105

    • DOI

      10.1007/s00208-012-0842-9

    • Peer Reviewed
  • [Journal Article] Auslander-Reiten conjecture and Auslander-Reiten duality2013

    • Author(s)
      Olgur Celikbas; Ryo Takahashi
    • Journal Title

      Journal of Algebra

      Volume: 382 Pages: 100-114

    • DOI

      10.1016/j.jalgebra.2013.02.007

    • Peer Reviewed
  • [Presentation] TBA2014

    • Author(s)
      Ryo Takahashi
    • Organizer
      Commutative Algebra and Singularity Theory 2014
    • Place of Presentation
      Tateyama Kokusai Hotel, Toyama
    • Year and Date
      20140728-20140801
    • Invited
  • [Presentation] Thick subcategories generated by Serre subcategories

    • Author(s)
      Ryo Takahashi
    • Organizer
      Localising and Tilting in Abelian and Triangulated Categories
    • Place of Presentation
      Mathematisches Forschungsinstitut Oberwolfach, Oberwolfach, Germany
    • Invited
  • [Presentation] Annihilation of Ext modules and generation of derived categories

    • Author(s)
      Ryo Takahashi
    • Organizer
      Localising and Tilting in Abelian and Triangulated Categories
    • Place of Presentation
      Mathematisches Forschungsinstitut Oberwolfach, Oberwolfach, Germany
    • Invited
  • [Presentation] Exact categories over Cohen-Macaulay rings

    • Author(s)
      Ryo Takahashi
    • Organizer
      The Second Pacific Rim Mathematical Association (PRIMA) Congress
    • Place of Presentation
      Shanghai Jiao Tong University, Shanghai, China
    • Invited
  • [Presentation] Existence of cohomology annihilators and strong generation of derived categories

    • Author(s)
      Ryo Takahashi
    • Organizer
      Perspectives of Representation Theory of Algebras, The 13th International Conference by Graduate School of Mathematics, Nagoya University
    • Place of Presentation
      Nagoya University, Nagoya, Japan
    • Invited
  • [Presentation] Generating singularity categories

    • Author(s)
      Ryo Takahashi
    • Organizer
      Commutative Algebra and its interaction to Algebraic Geometry and Combinatorics
    • Place of Presentation
      Institute of Mathematics, Hanoi, Vietnam
    • Invited
  • [Remarks] Ryo Takahashi

    • URL

      http://www.math.nagoya-u.ac.jp/~takahashi/

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Published: 2015-05-28  

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