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McKay correspondence and derived category

Research Project

Project/Area Number 19K03444
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11010:Algebra-related
Research InstitutionNagoya University

Principal Investigator

Ishii Akira  名古屋大学, 多元数理科学研究科, 教授 (10252420)

Project Period (FY) 2019-04-01 – 2025-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
KeywordsMcKay対応 / 導来圏 / exceptional collection / 半直交分解 / クレパント解消 / 最大特異点解消 / ダイマー模型 / モジュライ空間 / McKay 対応 / 例外列 / spherical twist / マッカイ対応 / 商特異点 / 例外生成系
Outline of Research at the Start

マッカイ対応とは,n 次一般線形群の有限部分群 Gに対して,アフィンn次元空間のGによる商特異点の特異点解消の幾何学と,G の表現論との間に成立すると期待される対応であり,次元の低い場合にはすでに確立されている. McKay 対応の定式化としてはいくつかのものが考えられるが,本研究では二つの導来圏の間の圏同値として対応を記述するものを想定している.本研究は,導来圏同値としてのマッカイ対応を拡張するとともに,代数多様体の導来圏の構造について,具体例を通じて明らかにしようとするものである.

Outline of Final Research Achievements

We published a paper on the moduli of G-constellations for a subgroup G of GL(2) and a paper on consistent dimer models with group actions. We studied exceptional collections on the Hirzebruch surface Σ2 with Okawa and Uehara, and classified exceptional collections up to spherical twists and mutations of exceptional collections. This result is submitted. With a graduate student Nimura, we studied the derived McKay correspondence for real reflection groups of rank 3 and verified a conjecture on the existence of a certain semiorthogonal decomposition.

Academic Significance and Societal Importance of the Research Achievements

Hirzebruch 曲面Σ2は弱 del Pezzo 曲面であり,これまで知られていた Del Pezzo 曲面の場合とは spherical twist の存在という点で大きく異なっている.Σ2の場合にDel Pezzo曲面との違いが本質的に spherical twist によってもたらされていることがわかったことが意義深い.また,階数3の実鏡映群に対する導来McKay対応はの研究では,極大特異点解消の存在がわかったこと,さらにその具体的構造を調べることにより,半直交分解に関する予想を解決することができたことが成果である.

Report

(7 results)
  • 2024 Annual Research Report   Final Research Report ( PDF )
  • 2023 Research-status Report
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (19 results)

All 2025 2024 2023 2021 2020 2019 2018 Other

All Int'l Joint Research (6 results) Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 5 results,  Invited: 7 results) Funded Workshop (1 results)

  • [Int'l Joint Research] Universidad Autonoma de Madrid (UAM)(スペイン)

    • Related Report
      2023 Research-status Report
  • [Int'l Joint Research] Universidad Autonoma de Madrid (UAM)(スペイン)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] UA Madrid(スペイン)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] 東京大学(日本)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] UA Madrid(スペイン)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] 東京大学(日本)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Dimer models and group actions2023

    • Author(s)
      Ishii Akira、Nolla Alvaro、Ueda Kazushi
    • Journal Title

      Mathematische Zeitschrift

      Volume: 306 Issue: 1 Pages: 1-24

    • DOI

      10.1007/s00209-023-03394-4

    • Related Report
      2023 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] G-constellations and the maximal resolution of a quotient surface singularity2020

    • Author(s)
      Ishii Akira
    • Journal Title

      Hiroshima Mathematical Journal

      Volume: 50 Issue: 3 Pages: 375-398

    • DOI

      10.32917/hmj/1607396494

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Extended McKay correspondence for quotient surface singularities2018

    • Author(s)
      Akira Ishii and Iku Nakamura
    • Journal Title

      The Quarterly Journal of Mathematics

      Volume: - Issue: 2 Pages: 00-00

    • DOI

      10.1093/qmath/hay047

    • NAID

      120006767378

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] On the McKay correspondence for some reflection groups in dimension three2025

    • Author(s)
      Akira Ishii
    • Organizer
      erspectives in Tilting Theory and Related Topics
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On the McKay correspondence for some reflection groups2024

    • Author(s)
      Akira Ishii
    • Organizer
      Workshop on Tropical Geometry, Singularity theory, and Algebraic Geometry
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On the McKay correspondence for some reflection groups2024

    • Author(s)
      Akira Ishii
    • Organizer
      Japanese European symposium on symplectic varieties and moduli spaces,
    • Related Report
      2024 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 鏡映群の McKay 対応について2024

    • Author(s)
      石井亮
    • Organizer
      非可換代数幾何学の大域的問題とその周辺
    • Related Report
      2024 Annual Research Report
  • [Presentation] McKay correspondence for some finite reflection groups2023

    • Author(s)
      石井亮
    • Organizer
      Kinosaki Algebraic Geometry Symposium 2023
    • Related Report
      2023 Research-status Report
    • Invited
  • [Presentation] Exceptional collections on Σ22021

    • Author(s)
      石井亮
    • Organizer
      名古屋代数幾何学セミナー
    • Related Report
      2021 Research-status Report
  • [Presentation] Dimer models with group actions2019

    • Author(s)
      Akira Ishii
    • Organizer
      Japanese-European Symposium on Symplectic Varieties and Moduli Spaces - Fourth Edition
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Exceptional collections on the Hirzebruch surface Σ22019

    • Author(s)
      Akira Ishii
    • Organizer
      ategorical and Analytic Invariants in Algebraic Geometry VII
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Exceptional collections on the Hirzebruch surface Σ22019

    • Author(s)
      Akira Ishii
    • Organizer
      非可換代数幾何学の大域的問題とその周辺
    • Related Report
      2019 Research-status Report
    • Invited
  • [Funded Workshop] McKay correspondence, Tilting theory and related topics2023

    • Related Report
      2023 Research-status Report

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Published: 2019-04-18   Modified: 2026-01-16  

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