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A study of multiplicities associated to a graded ring extension

Research Project

Project/Area Number 24740032
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Algebra
Research InstitutionHokkaido University of Education (2013-2014)
Kagoshima National College of Technology (2012)

Principal Investigator

HAYASAKA Futoshi  北海道教育大学, 教育学部, 准教授 (20409460)

Project Period (FY) 2012-04-01 – 2015-03-31
Project Status Completed (Fiscal Year 2014)
Budget Amount *help
¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2014: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2013: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords局所環 / 加群 / ブックスバウム・リム重複度 / ブックスバウム・リム関数 / 多重次数付き環 / コーエン・マコーレー局所環 / 巡回加群 / 巴系加群 / 重複度
Outline of Final Research Achievements

We developed the general theory of a generalized Buchsbaum-Rim function of two variables and associated Buchsbaum-Rim multiplicities of a matrix over a local ring. We computed the generalized Buchsbaum-Rim function of two variables and its multiplicities in a special case, where the matrix is a parameter matrix of a special form over one-dimensional Cohen-Macaulay local ring. In the special case, we determined when the function coincides with the Buchsbaum-Rim polynomial of two variables. We also obtained the formula for associated Buchsbaum-Rim multiplicities in the special case.

Report

(4 results)
  • 2014 Annual Research Report   Final Research Report ( PDF )
  • 2013 Research-status Report
  • 2012 Research-status Report
  • Research Products

    (11 results)

All 2015 2014 2013 2012 Other

All Journal Article (4 results) (of which Peer Reviewed: 4 results) Presentation (7 results)

  • [Journal Article] A computation of Buchsbaum-Rim functions of two variables in a special case2015

    • Author(s)
      Futoshi Hayasaka
    • Journal Title

      Rocky Mountain Journal of Mathematics

      Volume: 未定

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Asymptotic periodicity of primes associated to multigraded modules2014

    • Author(s)
      Futoshi Hayasaka
    • Journal Title

      Communications in Algebra

      Volume: Volume 42, Issue 6 Issue: 6 Pages: 2769-2778

    • DOI

      10.1080/00927872.2013.774407

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Asymptotic periodicity of primes associated to multigraded modules2013

    • Author(s)
      Futoshi Hayasaka
    • Journal Title

      Communications in Algebra

      Volume: 未定

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Journal Article] Asymptotic periodicity of grade associated to multigraded modules2012

    • Author(s)
      Futoshi Hayasaka
    • Journal Title

      Proceedings of the American Mathematical Society

      Volume: 140

    • Related Report
      2012 Research-status Report
    • Peer Reviewed
  • [Presentation] 加群の2変数ブックスバウム・リム関数の計算2014

    • Author(s)
      早坂太
    • Organizer
      日本数学会
    • Place of Presentation
      広島大学(広島県・東広島市)
    • Year and Date
      2014-09-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] A computation of Buchsbaum-Rim multiplicities in a special case

    • Author(s)
      早坂太
    • Organizer
      第35回可換環論シンポジウム
    • Place of Presentation
      京都大学数理解析研究所
    • Related Report
      2013 Research-status Report
  • [Presentation] Buchsbaum-Rim multiplicity and its generalization

    • Author(s)
      早坂太
    • Organizer
      南九州代数系集会
    • Place of Presentation
      鹿児島大学
    • Related Report
      2013 Research-status Report
  • [Presentation] 次数付き環拡大に付随する重複度の計算

    • Author(s)
      早坂太
    • Organizer
      第25回可換環論セミナー
    • Place of Presentation
      奈良新公会堂
    • Related Report
      2012 Research-status Report
  • [Presentation] 巴系加群に付随する関数と重複度の計算

    • Author(s)
      早坂太
    • Organizer
      明治大学可換環論セミナー
    • Place of Presentation
      明治大学生田キャンパス
    • Related Report
      2012 Research-status Report
  • [Presentation] 多重次数付き加群の素イデアルの漸近的周期性

    • Author(s)
      早坂太
    • Organizer
      日本数学会
    • Place of Presentation
      九州大学
    • Related Report
      2012 Research-status Report
  • [Presentation] 次数付き環拡大に付随する関数と重複度の計算

    • Author(s)
      早坂太
    • Organizer
      明治大学可換環論セミナー
    • Place of Presentation
      明治大学生田キャンパス
    • Related Report
      2012 Research-status Report

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Published: 2013-05-31   Modified: 2019-07-29  

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