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Studies on singularities using non-commutative resolutions

Research Project

Project/Area Number 17K14159
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Algebra
Research InstitutionKyoto Sangyo University (2020)
The University of Tokyo (2017-2019)

Principal Investigator

NAKAJIMA Yusuke  京都産業大学, 理学部, 助教 (20783096)

Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords非可換特異点解消 / 非可換クレパント特異点解消 / 極大Cohen-Macaulay加群 / ダイマー模型 / トーリック環 / 日比環 / 正標数の可換環論 / 団理論 / 傾理論 / 変異 / トーリック特異点 / 無限表現型代数 / カラビ・ヤウ代数 / Cohen-Macaulay加群 / 団傾加群 / 特異点
Outline of Final Research Achievements

In this research project, I studied some singularities by using non-commutative algebras called non-commutative (crepant) resolutions. During the period of this project, I wrote six published papers and gave eleven research talks in international conferences. As the main topics, there are two results relating to toric singularities as follows:
(1) I observed the stable categories of three dimensional Gorenstein toric singularities and its cluster tilting objects using non-commutative crepant resolutions arising from dimer models.
(2) I constructed new non-commutative crepant resolutions for some classes of higher dimensional toric singularities (e.g., the ones associated to Hibi rings).

Academic Significance and Societal Importance of the Research Achievements

研究対象である非可換クレパント特異点解消は、連接層の導来圏の研究を契機として導入された非可換代数である。連接層の導来圏のみならず、極大Cohen-Macaulay加群の表現論など、多くの分野と関連することがこれまでに知られている。この非可換クレパント特異点解消を介した分野のつながりは、新たな研究視点をもたらし、複数の分野の発展につながってきた。本研究では、これまで存在が知られてなかった非可換クレパント特異点解消を新たに構成したり、その背後にある組合せ論的な構造を解明したりしており、この成果は関連分野の研究に大きく寄与している。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (37 results)

All 2021 2020 2019 2018 2017 Other

All Int'l Joint Research (2 results) Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 6 results,  Open Access: 3 results) Presentation (24 results) (of which Int'l Joint Research: 10 results,  Invited: 15 results) Remarks (3 results)

  • [Int'l Joint Research] Stockholm University(スウェーデン)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Centro de Investigacion en Matematicas(メキシコ)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Generalized F-signatures of Hibi rings2021

    • Author(s)
      Akihiro Higashitani, Yusuke Nakajima
    • Journal Title

      Illinois Journal of Mathematics

      Volume: 65 Issue: 1 Pages: 97-120

    • DOI

      10.1215/00192082-8827655

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Conic divisorial ideals of Hibi rings and their applications to non-commutative crepant resolutions2019

    • Author(s)
      Akihiro Higashitani, Yusuke Nakajima
    • Journal Title

      Selecta Mathematica New Series

      Volume: 25 Issue: 5 Pages: 1-25

    • DOI

      10.1007/s00029-019-0523-6

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Semi-steady non-commutative crepant resolutions via regular dimer models2019

    • Author(s)
      Yusuke Nakajima
    • Journal Title

      Algebraic Combinatorics

      Volume: 2 Issue: 2 Pages: 173-195

    • DOI

      10.5802/alco.39

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Non-commutative crepant resolutions of Hibi rings with small class group2019

    • Author(s)
      Yusuke Nakajima
    • Journal Title

      Journal of Pure and Applied Algebra

      Volume: 223 Issue: 8 Pages: 3461-3484

    • DOI

      10.1016/j.jpaa.2018.11.012

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Finite dimensional algebras arising from dimer models and their derived equivalences2019

    • Author(s)
      Yusuke Nakajima
    • Journal Title

      第51回環論および表現論シンポジウム報告集

      Volume: - Pages: 104-109

    • Related Report
      2018 Research-status Report
    • Open Access
  • [Journal Article] On steady non-commutative crepant resolutions2018

    • Author(s)
      Osamu Iyama and Yusuke Nakajima
    • Journal Title

      Journal of Noncommutative Geometry (掲載予定)

      Volume: 印刷中

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Mutations of Splitting Maximal Modifying Modules: The Case of Reflexive Polygons2017

    • Author(s)
      Yusuke Nakajima
    • Journal Title

      International Mathematics Research Notices

      Volume: - Issue: 2 Pages: 470-550

    • DOI

      10.1093/imrn/rnx114

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Conic divisorial ideals of Hibi rings and their applications2017

    • Author(s)
      Yusuke Nakajima
    • Journal Title

      第62回代数学シンポジウム報告集

      Volume: -

    • Related Report
      2017 Research-status Report
    • Open Access
  • [Presentation] Representation theory of algebras arising from dimer models2021

    • Author(s)
      Yusuke Nakajima
    • Organizer
      OCAMI代数セミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] On non-commutative crepant resolutions of toric singularities2020

    • Author(s)
      Yusuke Nakajima
    • Organizer
      阪大オンライン代数幾何学セミナー
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] Combinatorial mutations of polygons via dimer models2020

    • Author(s)
      Yusuke Nakajima
    • Organizer
      McKay correspondence, mutation and related topics
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] On Frobenius push-forward of Hibi rings2019

    • Author(s)
      Yusuke Nakajima
    • Organizer
      Commutative Algebra and Lattice Polytopes
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On deformations of dimer models2019

    • Author(s)
      Yusuke Nakajima
    • Organizer
      Mutations: Mirror Symmetry, Deformations, and Combinatorics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On generalized cluster categories associated to dimer models (poster presentation)2019

    • Author(s)
      Yusuke Nakajima
    • Organizer
      Cluster Algebras 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Singularities having large F-signatures2019

    • Author(s)
      Yusuke Nakajima
    • Organizer
      特異点論月曜セミナー
    • Related Report
      2019 Research-status Report
  • [Presentation] On stable categories of maximal Cohen-Macaulay modules of 3-dimensional Gorenstein toric rings2019

    • Author(s)
      Yusuke Nakajima
    • Organizer
      AMS Spring Central and Western Sectional Meeting : Special Session on Commutative Algebra
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Conic modules of toric rings and some applications to non-commutative resolutions2019

    • Author(s)
      Yusuke Nakajima
    • Organizer
      東大可換環論セミナー
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] On Frobenius push-forward of Hibi rings2019

    • Author(s)
      Yusuke Nakajima
    • Organizer
      Frobenius action in Commutative algebra: Recent Developments
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] McKay-type correspondence for three dimensional Gorenstein toric singularities2018

    • Author(s)
      Yusuke Nakajima
    • Organizer
      京都大学代数幾何学セミナー
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] McKay-type correspondence for three dimensional Gorenstein toric singularities2018

    • Author(s)
      Yusuke Nakajima
    • Organizer
      特異点論月曜セミナー
    • Related Report
      2018 Research-status Report
  • [Presentation] Representation theory of three dimensional Gorenstein toric singularities2018

    • Author(s)
      Yusuke Nakajima
    • Organizer
      Workshop on McKay correspondence and noncommutative algebra
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Finite dimensional algebras arising from dimer models and their derived equivalences2018

    • Author(s)
      Yusuke Nakajima
    • Organizer
      第51回環論および表現論シンポジウム
    • Related Report
      2018 Research-status Report
  • [Presentation] On non-commutative crepant resolutions for some toric rings2018

    • Author(s)
      Yusuke Nakajima
    • Organizer
      String-Math 2018
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Non-commutative crepant resolutions of some toric rings2018

    • Author(s)
      Yusuke Nakajima
    • Organizer
      Higher homological algebra and cluster tilting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Conic divisorial ideals of Hibi rings2017

    • Author(s)
      Yusuke Nakajima
    • Organizer
      特異点論月曜セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] Non-commutative crepant resolutions for some Hibi rings2017

    • Author(s)
      Yusuke Nakajima
    • Organizer
      名古屋大学 環論表現論セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] Non-commutative crepant resolutions for some Hibi rings (ポスター発表)2017

    • Author(s)
      Yusuke Nakajima
    • Organizer
      Matrix factorizations and related topics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Conic divisorial ideals of Hibi rings and their applications2017

    • Author(s)
      Yusuke Nakajima
    • Organizer
      第62回代数学シンポジウム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Non-commutative crepant resolutions for some Hibi rings2017

    • Author(s)
      Yusuke Nakajima
    • Organizer
      Noncommutative Algebraic Geometry and Related Topics
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Non-commutative crepant resolutions for some toric singularities2017

    • Author(s)
      Yusuke Nakajima
    • Organizer
      特異点論月曜セミナー
    • Related Report
      2017 Research-status Report
  • [Presentation] On the Frobenius push-forward of Hibi rings2017

    • Author(s)
      Yusuke Nakajima
    • Organizer
      第39回可換環論シンポジウム
    • Related Report
      2017 Research-status Report
  • [Presentation] Several algebras arising from dimer models2017

    • Author(s)
      Yusuke Nakajima
    • Organizer
      第21回静岡代数学セミナー
    • Related Report
      2017 Research-status Report
    • Invited
  • [Remarks] Yuske Nakajima's Web Page

    • URL

      https://sites.google.com/view/nakajima-math

    • Related Report
      2020 Annual Research Report
  • [Remarks] Yusuke Nakajima's Web Page

    • URL

      https://sites.google.com/view/nakajima-math/home

    • Related Report
      2019 Research-status Report
  • [Remarks] Yusuke Nakajima's Web Page

    • URL

      https://sites.google.com/view/nakajima-math

    • Related Report
      2018 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2022-01-27  

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