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Moduli of representations and related topics (4)

Research Project

Project/Area Number 20K03509
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11010:Algebra-related
Research InstitutionUniversity of Yamanashi

Principal Investigator

Nakamoto Kazunori  山梨大学, 大学院総合研究部, 教授 (30342570)

Co-Investigator(Kenkyū-buntansha) 鳥居 猛  岡山大学, 自然科学学域, 教授 (30341407)
面田 康裕  明石工業高等専門学校, 自然科学系, 准教授 (30332042)
奥山 真吾  香川高等専門学校, 情報工学科, 准教授 (50290812)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2023: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords代数学 / 代数幾何学 / 不変式論 / 表現のモジュライ
Outline of Research at the Start

行列は基本的な代数的対象であり、複数個の行列を同時に分かりやすい標準型に変形することは、数学のさまざまな分野に多くの応用が考えられ有益である。群やモノイドといった代数的構造をもつ集合を行列に表現することは古くから考えられ、1つの表現(の同値類)を1点とするような幾何学的対象(表現のモジュライ)を調べることが本研究のテーマである。行列環の部分代数Aに対して、像が生成する部分代数がAに一致するような表現を集めると、Aに対する表現のモジュライが作られるであろうと予想し、実際に構成するのが本研究の目的である。その構造を調べることで表現に関する豊富な結果が得られると思われる。

Outline of Final Research Achievements

We published the paper on applications of Hochschild cohomology to the moduli of subalgebras of the full matrix ring (joint work with Takeshi Torii(Okayama University)). We also published the paper on the classification of thick representations of simple Lie groups (joint work with Yasuhiro Omoda(National Institute of Technology, Akashi College)). The preprint "Hochschild cohomology of the quadratic monomial algebra Nm"(arXiv:2403.20074) was announced (joint work with Tomohiro Itagaki(Takasaki City University of Economics) and T. Torii).
We described the moduli of 4-dimensional subalgebras of the full matrix ring of degree 3, and showed that there are three irreducible components of the moduli of 5-dimensional subalgebras of the full matrix ring of degree 3(joint work with T.Torii).

Academic Significance and Societal Importance of the Research Achievements

得られた研究結果より、3次の鋳型に対する表現のモジュライを構成する手掛かりが得られた。一般の体上(もしくは可換環上)の3次の行列環の部分代数について記述する方法が得られ、特に一般の体上4次元部分代数の(内部自己同型に関する)同値類が6個であることも判明した。また、一般の有限次元quadratic monomial algebraのHochschild cohomology環の構造を決定するヒントとして具体的な計算例を提示した。
本研究のテーマである行列は基本的な代数的対象であり、複数個の行列を同時に分かりやすい標準型に変形することは、数学のさまざまな分野に多くの応用が考えられ有益である。

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (37 results)

All 2024 2023 2022 2021 2020 Other

All Journal Article (8 results) (of which Peer Reviewed: 7 results,  Open Access: 1 results) Presentation (26 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Remarks (3 results)

  • [Journal Article] The moduli of 4-dimensional subalgebras of the full matrix ring of degree 32024

    • Author(s)
      Kazunori Nakamoto and Takeshi Torii
    • Journal Title

      Symposium on Ring Theory and Representation Theory Organizing Committee, Matsumoto, 2024

      Pages: 66-73

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] Decision Tree-Based Estimation of the Overlap of Two Probability Distributions2023

    • Author(s)
      Hisashi Johno and Kazunori Nakamoto
    • Journal Title

      Journal of Mathematical Sciences, the University of Tokyo

      Volume: 30 Pages: 21-54

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A novel statistical approach for two-sample testing based on the overlap coefficient2023

    • Author(s)
      Atsushi Komaba, Hisashi Johno and Kazunori Nakamoto
    • Journal Title

      Journal of Mathematical Sciences, the University of Tokyo

      Volume: 30 Pages: 205-240

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Applications of Hochschild cohomology to the moduli of subalgebras of the full matrix ring2023

    • Author(s)
      Nakamoto Kazunori, Torii Takeshi
    • Journal Title

      Journal of Pure and Applied Algebra

      Volume: 227 Issue: 11 Pages: 107426-107426

    • DOI

      10.1016/j.jpaa.2023.107426

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A perfect pairing for monoidal adjunctions2023

    • Author(s)
      Torii Takeshi
    • Journal Title

      Proceedings of the American Mathematical Society

      Volume: 151 Pages: 5069-5080

    • DOI

      10.1090/proc/16460

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The classification of thick representations of simple Lie groups2022

    • Author(s)
      Nakamoto Kazunori、Omoda Yasuhiro
    • Journal Title

      Kodai Mathematical Journal

      Volume: 45 Issue: 2 Pages: 259-269

    • DOI

      10.2996/kmj45204

    • ISSN
      0386-5991, 1881-5472
    • Year and Date
      2022-06-30
    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] The classification of thick representations of simple Lie groups2022

    • Author(s)
      Kazunori Nakamoto and Yasuhiro Omoda
    • Journal Title

      Kodai Mathematical Journal

      Volume: -

    • NAID

      130008004953

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] An application of Hochschild cohomology to the moduli of subalgebras of the full matrix ring II2021

    • Author(s)
      Kazunori Nakamoto and Takeshi Torii
    • Journal Title

      第8回日中韓環論国際シンポジウム報告集

      Volume: -

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] The moduli of 4-dimensional subalgebras of the full matrix ring of degree 32024

    • Author(s)
      鳥居猛、中本和典
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] A mate correspondence for ∞-bicategories2024

    • Author(s)
      鳥居 猛
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] m-thick representations of simple Lie groups2024

    • Author(s)
      面田 康裕
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 偏モノイドの代数幾何2024

    • Author(s)
      奥山 真吾
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Algebraic Geometry of Partial Monoids2024

    • Author(s)
      Shingo Okuyama
    • Organizer
      Workshop "Prospects of Theory of Riemann Surfaces"
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The moduli of 4-dimensional subalgebras of the full matrix ring of degree 32023

    • Author(s)
      Kazunori Nakamoto and Takeshi Torii
    • Organizer
      第55回環論および表現論シンポジウム
    • Related Report
      2023 Annual Research Report
  • [Presentation] 1次元単純ランダムウォークの範囲における鏡像法の応用2023

    • Author(s)
      駒場 敦, 城野悠志, 中本和典
    • Organizer
      日本数学会秋季総合分科会 統計数学分科会
    • Related Report
      2023 Annual Research Report
  • [Presentation] A mate correspondence for ∞-bicategories2023

    • Author(s)
      鳥居 猛
    • Organizer
      高知ホモトピー論談話会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Characterization of 4-dimensional non-thick irreducible representations2022

    • Author(s)
      面田康裕、中本和典
    • Organizer
      第54回環論および表現論シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] 2標本Kolmogorov-Smirnov検定の拡張2022

    • Author(s)
      駒場敦、城野悠志、中本和典
    • Organizer
      日本数学会秋季総合分科会(北海道大学) 統計数学分科会
    • Related Report
      2022 Research-status Report
  • [Presentation] 2標本Kolmogorov-Smirnov検定の拡張 ~組合せ論の観点から~2022

    • Author(s)
      中本和典
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2022 Research-status Report
  • [Presentation] E_n代数のKoszul双対性2022

    • Author(s)
      鳥居猛
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2022 Research-status Report
  • [Presentation] Uniqueness of monoidal adjunctions2022

    • Author(s)
      鳥居猛
    • Organizer
      高知ホモトピー論談話会2022
    • Related Report
      2022 Research-status Report
  • [Presentation] A new framework of partially additive algebraic geometry2022

    • Author(s)
      奥山真吾
    • Organizer
      第54回環論および表現論シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] 偏加法的な環とF_1上の偏群スキーム2022

    • Author(s)
      奥山真吾
    • Organizer
      日本数学会秋季総合分科会(北海道大学) 代数学分科会
    • Related Report
      2022 Research-status Report
  • [Presentation] 偏加法的な環と幾何学2022

    • Author(s)
      奥山真吾
    • Organizer
      2022年度ホモトピー論シンポジウム
    • Related Report
      2022 Research-status Report
  • [Presentation] 一般線形群を与えるaffine偏スキームについて2022

    • Author(s)
      奥山真吾
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2022 Research-status Report
  • [Presentation] 偏加法的な環とホモトピー論2022

    • Author(s)
      奥山真吾
    • Organizer
      高知ホモトピー論談話会2022
    • Related Report
      2022 Research-status Report
  • [Presentation] Hochschild cohomology of N_m2022

    • Author(s)
      板垣智洋、鳥居猛、中本和典
    • Organizer
      日本数学会代数学分科会
    • Related Report
      2021 Research-status Report
  • [Presentation] Hochschild cohomology of N_m2021

    • Author(s)
      板垣智洋、鳥居猛、中本和典
    • Organizer
      第53回環論および表現論シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] 決定木を用いた確率分布間の Overlap の推定2021

    • Author(s)
      中本和典
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2021 Research-status Report
  • [Presentation] Thick 表現とテンソル積2021

    • Author(s)
      面田康裕、中本和典
    • Organizer
      日本数学会2021年度年会代数学分科会
    • Related Report
      2020 Research-status Report
  • [Presentation] thick 表現とdense 表現(1)2020

    • Author(s)
      面田康裕、中本和典
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2020 Research-status Report
  • [Presentation] En代数の変形とHochschild cohomology II2020

    • Author(s)
      鳥居猛
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2020 Research-status Report
  • [Presentation] On Geometry Defined by a Tensor Category2020

    • Author(s)
      Shingo Okuyama
    • Organizer
      Workshop “Prospects of Theory of Riemann Surfaces” 山口大学
    • Related Report
      2020 Research-status Report
  • [Presentation] 偏環のテンソル圏と幾何学2020

    • Author(s)
      奥山真吾
    • Organizer
      「非可換代数幾何学の大域的問題とその周辺」高知小研究集会
    • Related Report
      2020 Research-status Report
  • [Remarks] 山梨大学 研究者総覧

    • URL

      https://eradb-ref.yamanashi.ac.jp/html/100007133_ja.html

    • Related Report
      2023 Annual Research Report
  • [Remarks] 山梨大学医学部総合医科学センター[数学]

    • URL

      https://www.med.yamanashi.ac.jp/medicine/mathematics/

    • Related Report
      2023 Annual Research Report 2022 Research-status Report 2021 Research-status Report 2020 Research-status Report
  • [Remarks] 山梨大学 教員情報検索

    • URL

      http://nerdb-re.yamanashi.ac.jp/Profiles/322/0032156/profile.html

    • Related Report
      2022 Research-status Report 2021 Research-status Report 2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-11-21  

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