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2016 Fiscal Year Research-status Report

可換環の導来圏のthick部分圏と次元

Research Project

Project/Area Number 16K05098
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) 2016-04-01 – 2019-03-31
Keywords可換環 / Noether環 / 局所環 / 有限生成加群 / 導来圏 / 三角圏
Outline of Annual Research Achievements

平成28年度は以下の研究を行った。
(1) 可換Noether環上の有限生成加群の第nシジジーがいつ(Auslander-Bridgerの意味での)n捩れ無しになるか?という問題を考察した。この問題をSerre条件とRの局所Gorenstein性に関連付けて捉えることで、古典的なEvans-Griffithの定理の逆を証明した。(2) 可換Noether局所環上の有限生成自由加群からの既約全射および有限生成自由加群への既約単射の構造を詳細に調べた。そして、その結果を用いてTor,Extの消滅問題に一つの解答を与えた。(3) 非可換特異点解消をもつNoether多元環上で別の非可換特異点解消を構築する方法を与えた。応用として、正則環上の任意の長さ有限な加群から非可換特異点解消が得られることがわかった。(4) 体上のアフィン代数あるいは等標数の完備局所環では、Jacobiイデアルの冪がExt関手を零化することを示した。また、Jacobiイデアル自身がExt関手を零化するための十分条件もいくつか与えた。Noether differentの導来版を用いることでこれらが初めて可能になった。(5) 著名な予想であるAuslander-Reiten予想に関連して、可換Noether局所環のイデアルの自己Ext加群の消滅問題を考察し、極大イデアルに関する弱充満イデアルに対して解答を与えた。(6) 可換Noether環上の有限生成加群の右有界導来圏のテンソル三角圏構造を深く調べた。Thickテンソルイデアルの分類問題の考察、Balmer spectrumの位相構造の解析を通して、国際数学者会議(ICM)でBalmerが提示した予想に反例を与えた。(7) Cohen-Macaulay正規整域Rとそれの標準被覆Sに対し、Rが非可換クレパント特異点解消をもつことと、RがQ-GorensteinかつSがGorensteinかつSが非可換クレパント特異点解消をもつことが同値になることを示した。

Current Status of Research Progress
Current Status of Research Progress

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

Reason

可換環の導来圏のthick部分圏の分類研究において満足できる成果を得た。すなわち、可換Noether環上の有限生成加群のなすアーベル圏の右有界導来圏の余コンパクト生成なthickテンソルイデアルを完全に分類することができた。さらに、コンパクト生成なthickテンソルイデアルおよび順thickテンソルイデアルの完全分類も副産物として得られた。

Strategy for Future Research Activity

今後は、平成28年度に行ったthickテンソルイデアルの分類研究において展開したアプローチを可換Noether環の特異圏(つまり安定導来圏)のthick部分圏の分類研究に応用していく計画である。

Causes of Carryover

2017年の8月から10月にかけて、アメリカとメキシコに合計1ヶ月程度出張する必要性が出てきたため。

Expenditure Plan for Carryover Budget

2017年の8月から10月にかけて、アメリカとメキシコに合計1ヶ月程度出張するための旅費の一部に充てる。

  • Research Products

    (25 results)

All 2019 2017 2016 Other

All Int'l Joint Research (3 results) Journal Article (11 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 11 results,  Acknowledgement Compliant: 8 results) Presentation (10 results) (of which Int'l Joint Research: 8 results,  Invited: 10 results) Remarks (1 results)

  • [Int'l Joint Research] University of Utah/University of Kansas/West Virginia University(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      University of Utah/University of Kansas/West Virginia University
    • # of Other Institutions
      1
  • [Int'l Joint Research] University of Glasgow(英国)

    • Country Name
      UNITED KINGDOM
    • Counterpart Institution
      University of Glasgow
  • [Int'l Joint Research] Inst. for Res. in Fund. Sci. (IPM)/University of Isfahan(イラン)

    • Country Name
      IRAN
    • Counterpart Institution
      Inst. for Res. in Fund. Sci. (IPM)/University of Isfahan
  • [Journal Article] Geometric linkage and syzygies of modules2019

    • Author(s)
      Olgur Celikbas; Mohammad T. Dibaei; Mohsen Gheibi; Arash Sadeghi; Ryo Takahashi
    • Journal Title

      Journal of Commutative Algebra

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Singularity categories and singular equivalences for resolving subcategories2017

    • Author(s)
      Matsui Hiroki、Takahashi Ryo
    • Journal Title

      Mathematische Zeitschrift

      Volume: 285 Pages: 251~286

    • DOI

      10.1007/s00209-016-1706-x

    • Peer Reviewed
  • [Journal Article] When are n-syzygy modules n-torsionfree?2017

    • Author(s)
      Matsui Hiroki、Takahashi Ryo、Tsuchiya Yoshinao
    • Journal Title

      Archiv der Mathematik

      Volume: 108 Pages: 351~355

    • DOI

      10.1007/s00013-017-1020-9

    • Peer Reviewed
  • [Journal Article] On the Auslander-Reiten conjecture for Cohen-Macaulay local rings2017

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

      Proceedings of the American Mathematical Society

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1090/proc/13487

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Thick subcategories over isolated singularities2017

    • Author(s)
      Ryo Takahashi
    • Journal Title

      Pacific Journal of Mathematics

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Annihilation of cohomology and strong generation of module categories2016

    • Author(s)
      Srikanth B. Iyengar; Ryo Takahashi
    • Journal Title

      International Mathematics Research Notices

      Volume: 2016 Pages: 499-535

    • DOI

      10.1093/imrn/rnv136

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Ulrich ideals and modules of two-dimensional rational singularities2016

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

      Nagoya Mathematical Journal

      Volume: 221 Pages: 69-110

    • DOI

      10.1017/nmj.2015.1

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Perfect linkage of Cohen-Macaulay modules over Cohen-Macaulay rings2016

    • Author(s)
      Kei-ichiro Iima; Ryo Takahashi
    • Journal Title

      Journal of Algebra

      Volume: 458 Pages: 134-155

    • DOI

      10.1016/j.jalgebra.2016.03.014

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Ulrich ideals and almost Gorenstein rings2016

    • Author(s)
      Shiro Goto; Ryo Takahashi; Naoki Taniguchi
    • Journal Title

      Proceedings of the American Mathematical Society

      Volume: 144 Pages: 2811-2823

    • DOI

      10.1090/proc/12970

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Extension closedness of syzygies and local Gorensteinness of commutative rings2016

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

      Algebras and Representation Theory

      Volume: 19 Pages: 511-521

    • DOI

      10.1007/s10468-015-9585-0

    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Annihilation of cohomology, generation of modules and finiteness of derived dimension2016

    • Author(s)
      Abdolnaser Bahlekeh; Ehsan Hakimian; Shokrollah Salarian; Ryo Takahashi
    • Journal Title

      The Quarterly Journal of Mathematics

      Volume: 67 Pages: 387-404

    • DOI

      10.1093/qmath/haw015

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] TBA2017

    • Author(s)
      Ryo Takahashi
    • Organizer
      Third Pacific Rim Mathematical Association (PRIMA) Congress
    • Place of Presentation
      Instituto Tecnologico de Oaxaca (ITO)
    • Year and Date
      2017-08-14 – 2017-08-15
    • Int'l Joint Research / Invited
  • [Presentation] TBA2017

    • Author(s)
      Ryo Takahashi
    • Organizer
      The Prospects for Commutative Algebra
    • Place of Presentation
      ホテル日航大阪
    • Year and Date
      2017-07-10 – 2017-07-14
    • Int'l Joint Research / Invited
  • [Presentation] Cohen-Macaulay modules over Gorenstein local rings2017

    • Author(s)
      Ryo Takahashi
    • Organizer
      Seminar Course Homological Algebra, Lecture Series
    • Place of Presentation
      Universita di Verona
    • Year and Date
      2017-03-08 – 2017-03-21
    • Int'l Joint Research / Invited
  • [Presentation] Balmer spectra of homotopy categories of projective modules2017

    • Author(s)
      高橋 亮
    • Organizer
      Mini Workshop on Commutative Algebra
    • Place of Presentation
      沖縄科学技術大学院大学 (OIST)
    • Year and Date
      2017-01-28 – 2017-01-28
    • Invited
  • [Presentation] The category of maximal Cohen-Macaulay modules2017

    • Author(s)
      Ryo Takahashi
    • Organizer
      MSRI Summer Graduate School
    • Int'l Joint Research / Invited
  • [Presentation] 可換環の右有界導来圏のテンソル構造とBalmer spectrum2017

    • Author(s)
      高橋 亮
    • Organizer
      第62回代数学シンポジウム
    • Invited
  • [Presentation] Characterization of regular local rings and generation of their residue fields2016

    • Author(s)
      Ryo Takahashi
    • Organizer
      Japan-Vietnam joint workshop on commutative algebra
    • Place of Presentation
      明治大学
    • Year and Date
      2016-09-23 – 2016-09-23
    • Int'l Joint Research / Invited
  • [Presentation] Balmer spectra of right bounded derived categories of commutative rings2016

    • Author(s)
      Ryo Takahashi
    • Organizer
      Commutative Algebra Seminar
    • Place of Presentation
      University of Utah
    • Year and Date
      2016-09-02 – 2016-09-02
    • Int'l Joint Research / Invited
  • [Presentation] Thick tensor ideals of right bounded derived categories of commutative rings2016

    • Author(s)
      Ryo Takahashi
    • Organizer
      17th Workshop and International Conference on Representations of Algebras (ICRA)
    • Place of Presentation
      Syracuse University
    • Year and Date
      2016-08-10 – 2016-08-13
    • Int'l Joint Research / Invited
  • [Presentation] Introduction to Cohen-Macaulay representation theory2016

    • Author(s)
      Ryo Takahashi
    • Organizer
      RIMS Workshop: Non-commutative crepant resolutions, Ulrich Modules and generalizations of the McKay correspondence
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2016-06-14 – 2016-06-14
    • Int'l Joint Research / Invited
  • [Remarks] Ryo Takahashi

    • URL

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

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Published: 2018-01-16   Modified: 2022-02-16  

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