• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2015 Fiscal Year Annual Research Report

Almost Gorenstein環とUlrich加群の構造解析

Research Project

Project/Area Number 25400051
Research InstitutionMeiji University

Principal Investigator

後藤 四郎  明治大学, 理工学部, 教授 (50060091)

Co-Investigator(Kenkyū-buntansha) 居相 真一郎  北海道教育大学, 教育学部, 准教授 (50333125)
Project Period (FY) 2013-04-01 – 2016-03-31
Keywords可換環論 / Almost Gorenstein環 / canonical module / Cohen-Macaulay環 / Ulrich module
Outline of Annual Research Achievements

本研究の目的は,「almost Gorenstein環」論を,必ずしも解析的不分岐ではない一般の1次元局所環に対し展開することである。可換環論の関連分野への応用を図りながら,高次元の局所環と次数環に対する「almost Gorenstein環」の定義を提案し,高次元のalmost Gorenstein環の基礎理論を構築することである。
長期目標としては,局所環論とこれに随伴する各種次数環論を深化発展させることを最終目標とし,具体的には下記課題を設定し, 3年間で成果を挙げることを目指した。
課題 (1) 解析的不分岐でない1次元Cohen-Macaulay局所環に対し,almost Gorenstein環の定義を提案し,先行するBarucci - Froeberg の理論を拡張しながら具体例を解析し,未解決に終った諸問題の解決を図る。
課題 (2) 課題(1)の成果を踏まえ,高次元Cohen-Macaulay局所環に対しalmost Gorenstein環を定義して基礎理論を展開し,応用を述べる。
課題 (3) 高次元次数環に対しalmost Gorenstein環を定義し,その汎在性を保証する。
研究業績表にあるように,期待を上回る成果が得られた。この研究は,与えられたイデアルのRees代数のalmost Gorenstein性解析などの形で,現在も継続されている。また,VAST (Vietnam Academy of Science and Technology)やベトナムのThai Nguyen Universityとの間で,組織的な共同研究が開始されたが,中心テーマの一つに本研究課題が採用されている。国際共同研究の形で,今後の一層の発展が期待される。

  • Research Products

    (19 results)

All 2016 2015 Other

All Int'l Joint Research (2 results) Journal Article (9 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 9 results) Presentation (1 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (2 results) Funded Workshop (5 results)

  • [Int'l Joint Research] VAST/Thai Nguyen University/Ton Duc Thang University(ベトナム)

    • Country Name
      VIET NAM
    • Counterpart Institution
      VAST/Thai Nguyen University/Ton Duc Thang University
  • [Int'l Joint Research] Southern Connecticut State University/Rutgers University/New York City College of Technology-Cuny(米国)

    • Country Name
      U.S.A.
    • Counterpart Institution
      Southern Connecticut State University/Rutgers University/New York City College of Technology-Cuny
  • [Journal Article] Sectional genera of parameter ideals2016

    • Author(s)
      S. Goto and L. Ozeki
    • Journal Title

      J. Algebra

      Volume: 446 Pages: 58-76

    • DOI

      10.1016/j.jalgebra.2015.09.005

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

    • Author(s)
      S. Goto, R. Takahashi, and N. Taniguchi
    • Journal Title

      Proc. Amer. Math. Soc.

      Volume: 144 Pages: 2811-2823

    • Peer Reviewed
  • [Journal Article] The almost Gorenstein Rees algebras over two-dimensional regular local rings2016

    • Author(s)
      S. Goto, N. Matsuoka, N. Taniguchi, and K.-i. Yoshida
    • Journal Title

      Journal of Pure and Applied Algebra

      Volume: 220 Pages: 3425-3436

    • DOI

      10.1016/j.jpaa.2016.04.007

    • Peer Reviewed
  • [Journal Article] The almost Gorenstein Rees algebras of parameters2016

    • Author(s)
      S. Goto, N. Matsuoka, N. Taniguchi, and K.-i. Yoshida
    • Journal Title

      J. Algebra

      Volume: 452 Pages: 263-278

    • DOI

      10.1016/j.jalgebra.2015.12.022

    • Peer Reviewed
  • [Journal Article] Huneke-Wiegand conjecture and change of rings2015

    • Author(s)
      S. Goto, R. Takahashi, and N. Taniguchi
    • Journal Title

      J. Algebra

      Volume: 422 Pages: 33-52

    • DOI

      10.1016/j.jalgebra.2014.09.006

    • Peer Reviewed
  • [Journal Article] Almost Gorenstein rings - towards a theory of higher dimension2015

    • Author(s)
      S. Goto, R. Takahashi, and N. Taniguchi,
    • Journal Title

      Journal of Pure and Applied Algebra

      Volume: 219 Pages: 2666-2712

    • DOI

      10.1016/j.jpaa.2014.09.022

    • Peer Reviewed
  • [Journal Article] The second Hilbert coefficients and the homological torsions of parameters2015

    • Author(s)
      S. Goto and K. Ozeki
    • Journal Title

      J. Pure and Appl. Algebra

      Volume: 219 Pages: 1685-1703

    • DOI

      10.1016/j.jpaa.2014.07.006

    • Peer Reviewed
  • [Journal Article] On the cofiniteness of generalized local cohomology modules2015

    • Author(s)
      Nguyen Tu Cuong, Shiro Goto, and Nguyen Van Hoang
    • Journal Title

      Kyoto J. Math.

      Volume: 55 Pages: 169-185

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Chern and Euler coefficients of modules2015

    • Author(s)
      L. Ghezzi, S. Goto, J. Hong, K. Ozeki, T. T. Phuong, and V. W. Vasconcelos
    • Journal Title

      Acta Math Vietnam

      Volume: 40 Pages: 37-60

    • Peer Reviewed / Int'l Joint Research
  • [Presentation] When are the Rees algebras of parameter ideals almost Gorenstein graded rings?2016

    • Author(s)
      S. Goto
    • Organizer
      Workshop on Commutative Algebra – Part II, Local algebra and Representation theory
    • Place of Presentation
      VIASM’s villa, Ha Long, Vietnam
    • Year and Date
      2016-01-03 – 2016-01-07
    • Int'l Joint Research / Invited
  • [Remarks] 後藤研究室

    • URL

      http://www.isc.meiji.ac.jp/~math/labo/goto.html

  • [Remarks] 後藤研究室

    • URL

      http://www.commalg.jp/~goto/message/20140408/

  • [Funded Workshop] The 8th Japan-Vietnam Joint Seminar on Commutative Algebra2016

    • Place of Presentation
      VIASM’s villa, Ha Long, Vietnam
    • Year and Date
      2016-03-21 – 2016-03-25
  • [Funded Workshop] School on Commutative Algebra at Thai Nguyen University2016

    • Place of Presentation
      Thai Nguyen University, Thai Nguyen, Vietnam
    • Year and Date
      2016-03-17 – 2016-03-19
  • [Funded Workshop] Workshop on Commutative Algebra – Part II, Local algebra and Representation theory –, VIASM’s villa, Ha Long, Vietnam2016

    • Place of Presentation
      VIASM’s villa, Ha Long, Vietnam
    • Year and Date
      2016-01-03 – 2016-01-07
  • [Funded Workshop] Workshop on Commutative Algebra – Part I, Combinatorial aspects in Commutative Algebra–, VIASM’s villa, Ha Long, Vietnam2015

    • Place of Presentation
      VIASM’s villa, Ha Long, Vietnam
    • Year and Date
      2015-12-26 – 2015-12-30
  • [Funded Workshop] The JV Seminar on Commutative Algebra2015

    • Place of Presentation
      明治大学生田校舎(理工学部)第II校舎6号館
    • Year and Date
      2015-09-18 – 2015-09-23

URL: 

Published: 2017-01-06   Modified: 2022-02-01  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi