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2008 Fiscal Year Annual Research Report

整環の表現論

Research Project

Project/Area Number 18740007
Research InstitutionNagoya University

Principal Investigator

伊山 修  Nagoya University, 大学院・多元数理科学研究科, 准教授 (70347532)

KeywordsAuslander-Reiten理論 / Auslander多元環 / $n$-クラスター傾対象 / $n$-有限表現型 / 変異 / Calabi-Yau三角圏 / クラスター多元環 / Cohen-Macaulay加群
Research Abstract

高次元Auslander-Reiten理論として$n$-クラスター傾部分圏(=極大$(n-1)$-直交部分圏)を調べ、2008年度代数学賞を受賞した。受賞題目「高次Auslander-Reiten理論の研究」。
本年度は、特に$n$-有限表現型多元環(=加群圏に$n$-クラスター傾対象が存在する大域次元$n$の多元環)を調べ、昨年度に得た$n$-有限表現型多元環の帰納的構成に関して、導来圏の考察と合わせて論文としてまとめた。この成果は関連する結果と共に、5月にビーレフェルト、8月にサンパウロ(第13回多元環の表現論国際集会)、9月にオタワ、10月にシェールブルク、3月にケルンの各研究集会で発表した(全て招待講演)。
またBuan, Reiten, Smithとの共同研究で、$2$-Calabi-Yau三角圏における$2$-クラスター傾対象の変異に関して、Derksen-Weymar-Zelevinskyによって導入された、ポテンシャル付きクイバーの変異との互換性を証明する事ができた。応用として、クラスター傾多元環がそのクイバーで一意的に決定される、という予想を肯定的に解決した。また以前に得た、コクスター群の元に対応する$2$-Calabi-Yau的三角圏とその$2$-クラスター傾対象に関して、自己準同型環がポテンシャル付きクイバーによって与えられる事を示した。この成果は関連する結果と共に、4月にボストン、10月にバンフ、12月にメキシコの各研究集会で発表した(全て招待講演)。
他には、Inoue, Kuniba, Nakanishi, Suzukiとの共同研究で、一般クラスター圏を用いてT-systemの周期性を示した。また、Wemyssとの共同研究で2次元商特異点上のspecial Cohen-Macaulay加群を分類した。また、Takahashiと研究中の結果を9月のバンフの研究集会で、Kato, Miyachiと研究中の結果を6月のテヘランの研究集会で、以前のBurban, Keller, Reitenとの共同研究の成果を9月のバルセロナの研究集会で発表した(全て招待講演)。

  • Research Products

    (19 results)

All 2009 2008

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (16 results)

  • [Journal Article] Fomin-Zelevinsky mutation and tilting modules over Calabi-Yau algebras2008

    • Author(s)
      Osamu Iyama, Idun Reiten
    • Journal Title

      American Journal of Mathematics 103

      Pages: 1087-1149

    • Peer Reviewed
  • [Journal Article] Auslander-Reiten theory revisited2008

    • Author(s)
      Osamu Iyama
    • Journal Title

      Trends in Representation Theory of Algebras and Related Topics, European Mathematical Society

      Pages: 349-398

    • Peer Reviewed
  • [Journal Article] Cluster tilting in 2-Calabi-Yau categories II2008

    • Author(s)
      Osamu Iyama
    • Journal Title

      Oberwolfach Report 9

      Pages: 410-7414

    • Peer Reviewed
  • [Presentation] n-representation-finite algebras of type A2009

    • Author(s)
      Osamu Iyama
    • Organizer
      Workshop on Representations and Cohomology
    • Place of Presentation
      Cologne, Germany
    • Year and Date
      20090301-06
  • [Presentation] 2-Calabi-Yau categories associated with Coxeter group elements2008

    • Author(s)
      Osamu Iyama
    • Organizer
      International Conference and Workshop on Cluster Algebras and Related Topics
    • Place of Presentation
      Mexice city, Mexico
    • Year and Date
      20081208-20
  • [Presentation] Tilting and cluster tilting for quotient singularities2008

    • Author(s)
      Osamu Iyama
    • Organizer
      Representation theory of finite groups and algebras, and related topics
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20081120-21
  • [Presentation] Cluster tilting in 2-Calabi-Yau categories2008

    • Author(s)
      Osamu Iyama
    • Organizer
      Interactions Between Noncommutative Algebra and Algebraic Geometry
    • Place of Presentation
      Banff, Canada
    • Year and Date
      20081026-31
  • [Presentation] n-cluster tilting and n-APR tilting2008

    • Author(s)
      Osamu Iyama
    • Organizer
      XXth Meeting on Representation Theory of Algebras
    • Place of Presentation
      Sherbrooke, Canada
    • Year and Date
      20081024-25
  • [Presentation] Introduction to cluster tilting in 2-Calabi-Yau categories2008

    • Author(s)
      Osamu Iyama
    • Organizer
      Expansion of Combinatorial Representation Theory
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20081007-10
  • [Presentation] Cluster tilting for one-dimensional hypersurface singularities2008

    • Author(s)
      Osamu Iyama
    • Organizer
      Interactions between Representation Theory and Commutative Algebra
    • Place of Presentation
      Bercelona, Spain
    • Year and Date
      20080925-27
  • [Presentation] Tilting and cluster tilting objects for quotient singularities2008

    • Author(s)
      Osamu Iyama
    • Organizer
      Spectral Methods in Representation Theory of Algebras and Applications to the Study of Rings of Singularities
    • Place of Presentation
      Banff, Canada
    • Year and Date
      20080907-12
  • [Presentation] Tilting mutation and its application2008

    • Author(s)
      Osamu Iyama
    • Organizer
      41st Ring and Representation theory symposiuni
    • Place of Presentation
      Shizuoka, Japan
    • Year and Date
      20080905-07
  • [Presentation] Cluster tilting in 2-Calabi-Yau categories2008

    • Author(s)
      Osamu Iyama
    • Organizer
      Workshop "Crystals and Tropical Combinatorics"
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      20080826-30
  • [Presentation] n-cluster tilting for higher Auslander algebras2008

    • Author(s)
      Osamu Iyama
    • Organizer
      XIII International Conference on Representations of Algebras
    • Place of Presentation
      Sao Paulo, Brazil
    • Year and Date
      20080730-0808
  • [Presentation] n-cluster tilting and n-APR tilting2008

    • Author(s)
      Osamu Iyama
    • Organizer
      Mini-Symposium on ring theory in connection with representation theory and homological algebra
    • Place of Presentation
      Osaka, Japan
    • Year and Date
      20080716-17
  • [Presentation] Recollement of homotopy categories and Cohen-Macaulay modules2008

    • Author(s)
      Osamu Iyama
    • Organizer
      Representation Theory of Algebras
    • Place of Presentation
      Tehran, Iran
    • Year and Date
      20080615-25
  • [Presentation] (1) The finiteness of the representation dimension (2) Construction of algebras of finite global dimension as endomorphism algebras of n-cluster tilting objects2008

    • Author(s)
      Osamu Iyama
    • Organizer
      The Representation Dimention of Artin Algebras
    • Place of Presentation
      Bielefeld, Germany
    • Year and Date
      20080501-04
  • [Presentation] Mutation of cluster tilting object and potentials2008

    • Author(s)
      Osamu Iyama
    • Organizer
      Maurice Auslander Distinguished Lectures and International Conference
    • Place of Presentation
      Massachusetts, USA
    • Year and Date
      20080425-27
  • [Presentation] (1) Mini-course-Introduction to the Auslander-Reiten theory (2) n-cluster tilting and n-APR tilting2008

    • Author(s)
      Osamu Iyama
    • Organizer
      63 rd Algebra Day
    • Place of Presentation
      Ottawa, Canada
    • Year and Date
      2008-09-13

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Published: 2010-06-11   Modified: 2016-04-21  

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