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A study of the rationality problem from the viewpoint of the inverse Galois problem

Research Project

Project/Area Number 15K17511
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Algebra
Research InstitutionWakayama University

Principal Investigator

Kitayama Hidetaka  和歌山大学, 教育学部, 准教授 (20622567)

Project Period (FY) 2015-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords整数論 / 有理性問題 / Noether問題 / ガロアの逆問題 / ネーター問題 / 不変体有理性問題 / Galoisの逆問題 / 代数学
Outline of Final Research Achievements

In this study, I have developed my old paper "Quasi-monomial actions and some 4-dimensional rationality problems", A.Hoshi, M.Kang, H.Kitayama, Journal of Algebra, Vol.403, 363-400 (2014), which treated the rationality problem of 2-dimensional purely quasi-monomial actions. I obtained some results on 3-dimensional purely quasi-monomial actions and 2-dimensional quasi-monomial actions.

Academic Significance and Societal Importance of the Research Achievements

有理性問題は、代数幾何学の分野では古くからの主要な研究テーマであり、また、Noether問題と呼ばれるケースではガロアの逆問題の側面からも捉えられている。Noether問題についても様々な研究が知られているが、現在も未解決の問題となっている。このような状況において、今回の研究は、それに関連してquasi-monomialと呼ばれる群の作用による不変体の有理性を調べるものであり、Noether問題はじめ有理性問題全般としての意義がある。

Report

(6 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (16 results)

All 2020 2018 2017 2016 2015

All Journal Article (5 results) (of which Peer Reviewed: 5 results,  Open Access: 2 results,  Acknowledgement Compliant: 2 results) Presentation (11 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Three-dimensional purely quasi-monomial actions2020

    • Author(s)
      Akinari Hoshi, Hidetaka Kitayama
    • Journal Title

      Kyoto Journal of Mathematics

      Volume: 60 Issue: 1 Pages: 335-377

    • DOI

      10.1215/21562261-2019-0008

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Three-dimensional purely quasi-monomial actions2018

    • Author(s)
      Akinari Hoshi, Hidetaka Kitayama
    • Journal Title

      Kyoto Journal of Mathematics

      Volume: 印刷中

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] On the irreducibility of Fibonacci and Lucas polynomials over finite fields2017

    • Author(s)
      Hidetaka Kitayama, Daisuke Shiomi
    • Journal Title

      Finite Fields and Their Applications

      Volume: 48C Pages: 420-429

    • DOI

      10.1016/j.ffa.2017.09.003

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dimension formulas of paramodular forms of squarefree level and comparison with inner twist2017

    • Author(s)
      Tomoyoshi Ibukiyama, Hidetaka Kitayama
    • Journal Title

      Journal of the Mathematical Society of Japan

      Volume: 69 Issue: 2 Pages: 597-671

    • DOI

      10.2969/jmsj/06920597

    • NAID

      130006887130

    • ISSN
      0025-5645, 1881-1167, 1881-2333
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Dimension formulas of paramodular forms of squarefree level and comparison with inner twist2016

    • Author(s)
      Tomoyoshi Ibukiyama, Hidetaka Kitayama
    • Journal Title

      Journal of the Mathematical Society of Japan

      Volume: 未定

    • NAID

      130006887130

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] モジュラー形式とガロアの逆問題2018

    • Author(s)
      北山秀隆
    • Organizer
      第17回北陸数論研究集会
    • Related Report
      2018 Research-status Report
  • [Presentation] 純単項作用の不変体有理性問題2018

    • Author(s)
      北山秀隆
    • Organizer
      早稲田整数論研究集会
    • Related Report
      2017 Research-status Report
  • [Presentation] Siegel modular forms with respect to non-split symplectic groups2017

    • Author(s)
      北山秀隆
    • Organizer
      Journees Arithmetiques 2017
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Rationality problem for purely monomial group actions2017

    • Author(s)
      北山秀隆
    • Organizer
      日本数学会
    • Related Report
      2017 Research-status Report
  • [Presentation] Noetherの不変体有理性問題とその周辺2017

    • Author(s)
      北山秀隆
    • Organizer
      大分熊本整数論研究集会
    • Related Report
      2017 Research-status Report
  • [Presentation] Siegel modular forms with respect to non-split symplectic groups2017

    • Author(s)
      北山秀隆
    • Organizer
      3rd Japanese-German Number Theory Workshop
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 純単項作用の不変体有理性問題2017

    • Author(s)
      北山秀隆
    • Organizer
      新潟代数セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] Three-dimensional purely quasi-monomial actions2016

    • Author(s)
      北山秀隆
    • Organizer
      日本数学会2016年度年会
    • Place of Presentation
      筑波大学(茨城県つくば市天王台1丁目1-1)
    • Year and Date
      2016-03-16
    • Related Report
      2015 Research-status Report
  • [Presentation] Computations of Siegel modular forms with respect to non-split symplectic groups2015

    • Author(s)
      北山秀隆
    • Organizer
      RIMS研究集会「 計算代数システムによる新しい数学の開拓と進展」
    • Place of Presentation
      京都大学数理解析研究所(京都府京都市左京区北白川追分町)
    • Year and Date
      2015-10-01
    • Related Report
      2015 Research-status Report
  • [Presentation] あるジーゲルモジュラー形式の対応予想、およびリフティング予想とその数値実験2015

    • Author(s)
      北山秀隆
    • Organizer
      新潟代数セミナー
    • Place of Presentation
      新潟大学(新潟県新潟市西区五十嵐2の町8050)
    • Year and Date
      2015-07-17
    • Related Report
      2015 Research-status Report
  • [Presentation] ガロアの逆問題を背景とする不変体有理性問題について2015

    • Author(s)
      北山秀隆
    • Organizer
      埼玉大学理学部数学教室談話会
    • Place of Presentation
      埼玉大学(埼玉県さいたま市桜区下大久保255)
    • Year and Date
      2015-05-22
    • Related Report
      2015 Research-status Report

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Published: 2015-04-16   Modified: 2022-11-04  

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