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

Study on Bourbaki sequences and its applications

Research Project

Project/Area Number 21K13766
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 11010:Algebra-related
Research InstitutionOyama National College of Technology

Principal Investigator

Kumashiro Shinya  小山工業高等専門学校, 一般科, 助教 (40896023)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2023: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
KeywordsCohen-Macaulay環 / ヒルベルト関数 / 正準イデアル / トレースイデアル / 可換環論 / Gorenstein環 / ブルバキ完全列
Outline of Research at the Start

本研究の目標は、ブルバキ完全列の理論を深化させ、可換環上の加群の構造論に新たな展開をもたらすことである。ブルバキ完全列を用いることで、加群の情報をブルバキ完全列に現れるイデアル(=ブルバキイデアル)に遺伝できる。すなわち、既存の環の内部構造の理論(=イデアル論)を、環の外部表現の理論(=加群論)に応用するためのかけ橋となる。本研究では、このブルバキ完全列に対して、新たな解析方法を提供することを目指す。

Outline of Final Research Achievements

Commutative Algebra, to which this research project belongs, aims to investigate the structure of commutative rings. There are two main approaches to commutative ring theory: ideal theory, which investigates the internal structure of rings, and module theory, which investigates the external representation of rings. In this project, the purpose was to study the Bourbaki sequences, and we constructed a filtration of modules, which is a generalization of the Bourbaki sequences. Furthermore, by applying the filtration to exact modules reflecting the Hilbert function, we clarified the behavior of the Hilbert function of ideals of reduction numbers 2 or 3. We also explored canonical ideals.

Academic Significance and Societal Importance of the Research Achievements

ブルバキ完全列は与えられた加群を自由加群とイデアルに分解する短完全列のことである。ブルバキ完全列を通すことで、加群の性質をイデアルに遺伝させることができるため、可換環論の様々な問題において応用がある。本研究では、ブルバキ完全列を一般化させたフィルトレーションの構成を行った。またその構成を応用することで、ヒルベルト関数解析の研究に対し寄与することができた。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (25 results)

All 2023 2022 2021 Other

All Int'l Joint Research (2 results) Journal Article (12 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 12 results) Presentation (7 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results) Remarks (4 results)

  • [Int'l Joint Research] VAST/Thai Nguyen University of Education(ベトナム)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Thai Nguyen University of Education(ベトナム)

    • Related Report
      2021 Research-status Report
  • [Journal Article] Integrally Closed Ideals of Reduction Number Three2023

    • Author(s)
      Kumashiro Shinya
    • Journal Title

      Algebra Colloquium

      Volume: 30 Issue: 02 Pages: 315-324

    • DOI

      10.1142/s1005386723000263

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] When are Trace Ideals Finite?2023

    • Author(s)
      Kumashiro Shinya
    • Journal Title

      Mediterranean Journal of Mathematics

      Volume: 20 Issue: 5 Pages: 278-278

    • DOI

      10.1007/s00009-023-02481-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Auslander-Reiten conjecture for certain non-Gorenstein Cohen-Macaulay rings2023

    • Author(s)
      Kumashiro Shinya
    • Journal Title

      Journal of Pure and Applied Algebra

      Volume: 227 Issue: 11 Pages: 107420-107420

    • DOI

      10.1016/j.jpaa.2023.107420

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On the sectional genera and Cohen-Macaulay rings2023

    • Author(s)
      Kumashiro Shinya、Truong Hoang Le、Yen Hoang Ngoc
    • Journal Title

      Journal of Commutative Algebra

      Volume: 15 Issue: 4 Pages: 577-594

    • DOI

      10.1216/jca.2023.15.577

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The tiny trace ideals of the canonical modules in Cohen-Macaulay rings of dimension one2023

    • Author(s)
      Herzog Juergen、Kumashiro Shinya、Stamate Dumitru I.
    • Journal Title

      Journal of Algebra

      Volume: 619 Pages: 626-642

    • DOI

      10.1016/j.jalgebra.2022.12.026

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Graded filtrations and ideals of reduction number 22023

    • Author(s)
      Kumashiro Shinya
    • Journal Title

      Mathematische Nachrichten

      Volume: - Issue: 5 Pages: 1983-1996

    • DOI

      10.1002/mana.202100329

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Upper bound on the colength of the trace of the canonical module in dimension one2022

    • Author(s)
      Herzog Juergen、Kumashiro Shinya
    • Journal Title

      Archiv der Mathematik

      Volume: 119 Issue: 3 Pages: 237-246

    • DOI

      10.1007/s00013-022-01764-8

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The reduction number of canonical ideals2022

    • Author(s)
      Kumashiro Shinya
    • Journal Title

      Communications in Algebra

      Volume: 50 Issue: 11 Pages: 4619-4635

    • DOI

      10.1080/00927872.2022.2069790

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Integrally closed ideals of reduction number three2021

    • Author(s)
      Shinya Kumashiro
    • Journal Title

      Algebra Colloquium

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Graded filtrations and ideals of reduction number two2021

    • Author(s)
      Shinya Kumashiro
    • Journal Title

      Mathematische Nachrichten

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] The irreducible multiplicity and Ulrich modules2021

    • Author(s)
      Tran Nguyen An; Shinya Kumashiro
    • Journal Title

      Rocky Mountain Journal of Mathematics

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The reduction number of canonical ideals2021

    • Author(s)
      Shinya Kumashiro
    • Journal Title

      Communications in Algebra

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] Rings having a finite number of trace ideals2023

    • Author(s)
      Shinya Kumashiro
    • Organizer
      The 28th National School on Algebra
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Graded filtrations and ideals of reduction number two2023

    • Author(s)
      Shinya Kumashiro
    • Organizer
      Mini workshop on commutative algebra
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Study on Z_2 graded rings2023

    • Author(s)
      Shinya Kumashiro
    • Organizer
      Workshop The 11th Japan-Vietnam Joint seminar on Commutative Algebra, by and for young mathematicians
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Certain monomial ideals whose numbers of generators of powers descend2022

    • Author(s)
      Shinya Kumashiro
    • Organizer
      第3回情報数理セミナー
    • Related Report
      2022 Research-status Report
  • [Presentation] 正準加群のトレースのcolengthの上限2022

    • Author(s)
      Shinya Kumashiro
    • Organizer
      日本数学会2022年度秋季総合分科会
    • Related Report
      2022 Research-status Report
  • [Presentation] Graded Bourbaki ideals of graded modules and Ideals of reduction number two2022

    • Author(s)
      Shinya Kumashiro
    • Organizer
      Virtual Commutative Algebra Seminars
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 次数付フィルトレーションと節減数2のイデアル2022

    • Author(s)
      Shinya Kumashiro
    • Organizer
      日本数学会2022年度年会
    • Related Report
      2021 Research-status Report
  • [Remarks] 所属機関ホームページ

    • URL

      https://www.oit.ac.jp/ge/~kumashiro/index.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] home page

    • URL

      https://skumashiro.com/

    • Related Report
      2022 Research-status Report
  • [Remarks] homepage

    • URL

      https://skumashiro.com/

    • Related Report
      2021 Research-status Report
  • [Remarks] researchmap

    • URL

      https://researchmap.jp/skumashiro

    • Related Report
      2021 Research-status Report

URL: 

Published: 2021-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi