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2016 Fiscal Year Annual Research Report

整環の表現論の総合的研究

Research Project

Project/Area Number 16H03923
Research InstitutionNagoya University

Principal Investigator

伊山 修  名古屋大学, 多元数理科学研究科, 教授 (70347532)

Co-Investigator(Kenkyū-buntansha) 高橋 亮  名古屋大学, 多元数理科学研究科, 准教授 (40447719)
毛利 出  静岡大学, 理学部, 教授 (50436903)
Project Period (FY) 2016-04-01 – 2021-03-31
KeywordsAuslander対応 / d団傾部分圏 / d有限表現型 / 前d団傾部分圏 / 非可換特異点解消 / Gorenstein modification / Auslander-Bridger理論 / 準傾複体
Outline of Annual Research Achievements

高次Auslander対応は, 大域次元と支配次元がともにd+1の多元環を, d団傾加群と呼ばれる特別な加群の自己準同型環として表現論的に特徴付ける. 1団傾加群は有限表現型多元環の加法生成元に他ならないため, d団傾加群を持つ多元環はd有限表現型と呼ばれる.
有限表現型の自己入射多元環(フロベニウス多元環)は80年代に分類論が構築された. Darpoeとの共同研究で, 反復多元環の軌道多元環を用いる従来の手法を, 導来圏が分数的Calabi-Yau性を持つ多元環に適用することにより, d有限表現型の自己入射多元環を構成する統一的方法を発見した.
Solbergとの共同研究で, 高次Auslander対応のGorenstein類似を与えた. d団傾部分圏を拡張した前d団傾部分圏を導入し, 自己入射次元と支配次元がともにd+1の多元環を, 前d団傾加群の自己準同型環として表現論的に特徴付けた.
Dao, Takahashi, Wemyssとの共同研究で, 前d団傾加群の特異点類似であるGorenstein modificationを導入した. 応用として正準加群を持つ正規局所環Rに対し, Rが非可換特異点解消を持つことと, RがQ-Gorenstein環であり, その巡回被覆Sが次数付き非可換特異点解消を持つGorenstein環であることの同値性を, 弱い仮定のもと示した.
上の3人とIyengar, Yoshinoとの共同研究で, Auslander-Bridger理論による非可換特異点解消の構成を与えた.
導来圏で基本的な傾複体を変異の観点から補完するものが準傾複体であり, 中でも2項準傾複体はねじれ対の分類を与える重要なものである. Demonet, Reading, Reiten, Thomasとの共同研究で, ねじれ対の束構造を調べた. これに関しては次年度以降も研究する.

Current Status of Research Progress
Current Status of Research Progress

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

Reason

d有限表現型の自己入射多元環の基礎理論と, 高次Auslander対応のGorenstein類似を公表できた. 非可換特異点解消に関する2つの成果を公表し, 傾理論に関しては, ねじれ対の束理論の主要部分をまとめることができた.

Strategy for Future Research Activity

Gorenstein整環の特異導来圏に関する諸研究に, じっくりと取り組む予定である.

  • Research Products

    (39 results)

All 2018 2017 2016 Other

All Int'l Joint Research (6 results) Journal Article (14 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 14 results,  Acknowledgement Compliant: 1 results) Presentation (15 results) (of which Int'l Joint Research: 10 results,  Invited: 9 results) Remarks (1 results) Funded Workshop (3 results)

  • [Int'l Joint Research] University of Kansas/University of Utah/North Carolina State University(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      University of Kansas/University of Utah/North Carolina State University
  • [Int'l Joint Research] University of Glasgow(英国)

    • Country Name
      UNITED KINGDOM
    • Counterpart Institution
      University of Glasgow
  • [Int'l Joint Research] Universitaet Bonn(ドイツ)

    • Country Name
      GERMANY
    • Counterpart Institution
      Universitaet Bonn
  • [Int'l Joint Research] NTNU(ノルウェー)

    • Country Name
      NORWAY
    • Counterpart Institution
      NTNU
  • [Int'l Joint Research] Nanjing University(中国)

    • Country Name
      CHINA
    • Counterpart Institution
      Nanjing University
  • [Int'l Joint Research]

    • # of Other Countries
      1
  • [Journal Article] Silting reduction and Calabi--Yau reduction of triangulated categories2018

    • Author(s)
      Osamu Iyama, Dong Yang
    • Journal Title

      Trans. Amer. Math. Soc.

      Volume: 370 Pages: 7861--7898

    • DOI

      10.1090/tran/7213

    • 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)
      Goto Shiro、Takahashi Ryo
    • Journal Title

      Proceedings of the American Mathematical Society

      Volume: 145 Pages: 3289~3296

    • DOI

      10.1090/proc/13487

    • Peer Reviewed
  • [Journal Article] Reduction of triangulated categories and maximal modification algebras for cA_n singularities2017

    • Author(s)
      Osamu Iyama, Michael Wemyss
    • Journal Title

      J. Reine Angew. Math.

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1515/ crelle-2015-0031

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Higher Auslander correspondence for dualizing R-varieties2017

    • Author(s)
      Osamu Iyama, Gustavo Jasso
    • Journal Title

      Algebr. Represent. Theory

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1007/s10468-016-9645-0

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Geometric linkage and syzygies of modules2017

    • 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] 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
  • [Journal Article] Lifting preprojective algebras to orders and categorifying partial flag varieties2016

    • Author(s)
      Laurent Demonet, Osamu Iyama
    • Journal Title

      Algebra Number Theory

      Volume: 10 Pages: 1527-1579

    • DOI

      10.2140/ant.2016.10.1527

    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Stable Categories of Graded Maximal Cohen-Macaulay Modules over Noncommutative Quotient Singularities2016

    • Author(s)
      Izuru Mori, Kenta Ueyama
    • Journal Title

      Adv. Math.

      Volume: 297 Pages: 54--92

    • DOI

      10.1016/j.aim.2016.04.009

    • Peer Reviewed
  • [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
  • [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
  • [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
  • [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
  • [Presentation] Preprojective algebras and Calabi-Yau algebras2017

    • Author(s)
      Osamu Iyama
    • Organizer
      Subfactors, Higher Geometry, Higher twists and Almost Calabi-Yau Algebras
    • Place of Presentation
      Isaac Newton Institute, University of Cambridge, U.K.
    • Year and Date
      2017-03-28
    • Int'l Joint Research / Invited
  • [Presentation] Cohen-Macaulay modules over Gorenstein local rings2017

    • Author(s)
      Ryo Takahashi
    • Organizer
      Seminar Course Homological Algebra (3 Lectures)
    • Place of Presentation
      Universita di Verona, Verona, Italy
    • Year and Date
      2017-03-08 – 2017-03-21
    • Invited
  • [Presentation] Noncommutative resolutions using syzygies2016

    • Author(s)
      Osamu Iyama
    • Organizer
      第38回可換環論シンポジウム
    • Place of Presentation
      生産性国際交流センター、神奈川県
    • Year and Date
      2016-11-20
    • Int'l Joint Research
  • [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
    • Int'l Joint Research / Invited
  • [Presentation] m-Koszul AS-regular Algebras and Twisted Superpotentials2016

    • Author(s)
      Izuru Mori
    • Organizer
      Bridges between Noncommutative Algebras and Algebraic Geometry
    • Place of Presentation
      Banff International Research Station, Banff, AB, Canada
    • Year and Date
      2016-09-16
    • Int'l Joint Research / Invited
  • [Presentation] Quasi-hereditary rings and non-commutative resolutions2016

    • Author(s)
      Osamu Iyama
    • Organizer
      49th symposium on Ring Theory and Representation Theory
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2016-09-02
    • Int'l Joint Research
  • [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, Salt Lake City UT, USA
    • Year and Date
      2016-09-02
    • Invited
  • [Presentation] Finiteness of global dimension of endomorphism algebras2016

    • Author(s)
      Osamu Iyama
    • Organizer
      XVII International Conference on Representations of Algebras (ICRA 2016)
    • Place of Presentation
      Syracuse University, USA
    • Year and Date
      2016-08-15
    • Int'l Joint Research
  • [Presentation] Thick tensor ideals of right bounded derived categories of commutative rings2016

    • Author(s)
      Ryo Takahashi
    • Organizer
      XVII International Conference on Representations of Algebras (ICRA 2016)
    • Place of Presentation
      Syracuse University, USA
    • Year and Date
      2016-08-10 – 2016-08-13
    • Int'l Joint Research / Invited
  • [Presentation] Tilting theory for Gorenstein rings in dimension one2016

    • Author(s)
      Osamu Iyama
    • Organizer
      可換環論セミナー
    • Place of Presentation
      明治大学
    • Year and Date
      2016-07-16
  • [Presentation] Quotients of triangulated categories and theorems of Buchweitz, Orlov and Amiot-Guo-Keller2016

    • Author(s)
      Osamu Iyama
    • Organizer
      代数幾何・複素幾何セミナー
    • Place of Presentation
      大阪大学
    • Year and Date
      2016-07-06
    • Invited
  • [Presentation] McKay Correspondence and Beilinson Correspondence for AS-regular Algebras2016

    • Author(s)
      Izuru Mori
    • Organizer
      Non-commutative crepant resolutions, Ulrich modules and generalizations of the McKay correspondence
    • Place of Presentation
      数理解析研究所、京都大学
    • Year and Date
      2016-06-15
    • Int'l Joint Research / Invited
  • [Presentation] Higher preprojective algebras and Cohen-Macaulay representations2016

    • Author(s)
      Osamu Iyama
    • Organizer
      Non-commutative crepant resolutions, Ulrich modules and generalizations of the McKay correspondence
    • Place of Presentation
      数理解析研究所、京都大学
    • Year and Date
      2016-06-14
    • Int'l Joint Research
  • [Presentation] Introduction to Cohen-Macaulay representation theory2016

    • Author(s)
      Ryo Takahashi
    • Organizer
      Non-commutative crepant resolutions, Ulrich Modules and generalizations of the McKay correspondence
    • Place of Presentation
      数理解析研究所、京都大学
    • Year and Date
      2016-06-14
    • Int'l Joint Research
  • [Presentation] Lattice structure of preprojective algebras and Weyl groups2016

    • Author(s)
      Osamu Iyama
    • Organizer
      Algebra Seminar
    • Place of Presentation
      Norwegian University of Science and Technology, Trondheim, Norway
    • Year and Date
      2016-06-01
    • Invited
  • [Remarks] Osamu Iyama's Home Page

    • URL

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

  • [Funded Workshop] Representation Theory of Quivers and Finite Dimensional Algebras2017

    • Place of Presentation
      Mathematisches Forschungsinstitut Oberwolfach, Germany
    • Year and Date
      2017-02-19 – 2017-02-25
  • [Funded Workshop] 49th symposium on Ring Theory and Representation Theory2016

    • Place of Presentation
      大阪府立大学
    • Year and Date
      2016-08-31 – 2016-09-03
  • [Funded Workshop] Non-commutative crepant resolutions, Ulrich modules and generalizations of the McKay correspondence2016

    • Place of Presentation
      数理解析研究所、京都大学
    • Year and Date
      2016-06-13 – 2016-06-17

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Published: 2018-01-16   Modified: 2022-01-31  

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