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Nagai Yasunari  永井 保成

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永井 保成  ナガイ ヤスナリ

NAGAI Yasunari  永井 保成

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Researcher Number 50572525
Other IDs
Affiliation (Current) 2025: 早稲田大学, 理工学術院, 教授
Affiliation (based on the past Project Information) *help 2022 – 2023: 早稲田大学, 理工学術院, 教授
2017 – 2019: 早稲田大学, 理工学術院, 教授
2014 – 2016: 早稲田大学, 理工学術院, 准教授
2012: 早稲田大学, 理工学術院, 准教授
2011: 早稲田大学, 理工学術院, 講師
2010: 東京大学, 大学院・数理科学研究科, 特任助教
Review Section/Research Field
Principal Investigator
Algebra / Basic Section 11010:Algebra-related
Keywords
Principal Investigator
代数幾何学 / モジュライ理論 / 退化理論 / 射影幾何学 / 代数学 / 表現論 / 双有理幾何学 / 対称群の表現 / トーリック幾何学 / 代数多様体の退化 … More / 退化 / 計算機代数の応用 / 正則シンプレクティック幾何 / 双有理写像 / 代数多様体 Less
  • Research Projects

    (4 results)
  • Research Products

    (13 results)
  •  正則シンプレクティック多様体の射影モデルと退化の研究Principal Investigator

    • Principal Investigator
      永井 保成
    • Project Period (FY)
      2022 – 2026
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Review Section
      Basic Section 11010:Algebra-related
    • Research Institution
      Waseda University
  •  Moduli of sheaves on a cubic fourfold and irreducible symplectic manifoldsPrincipal Investigator

    • Principal Investigator
      Nagai Yasunari
    • Project Period (FY)
      2017 – 2019
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Algebra
    • Research Institution
      Waseda University
  •  Degeneration of irreducible symplectic varietiesPrincipal Investigator

    • Principal Investigator
      NAGAI Yasunari
    • Project Period (FY)
      2014 – 2016
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      Algebra
    • Research Institution
      Waseda University
  •  Explicit study of structures of irreducible symplectic manifoldsPrincipal Investigator

    • Principal Investigator
      NAGAI Yasunari
    • Project Period (FY)
      2010 – 2012
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      Algebra
    • Research Institution
      Waseda University
      The University of Tokyo

All 2023 2019 2017 2015 2012 2010

All Journal Article Presentation

  • [Journal Article] Non-locally-free locus of O'Grady's ten dimensional example2012

    • Author(s)
      Nagai, Yasunrai
    • Journal Title

      manuscripta mathematica

      Volume: 142 Issue: 1-2 Pages: 127-156

    • DOI

      10.1007/s00229-012-0595-5

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22740004
  • [Presentation] Hilbert scheme of points on a surface and its degeneration2023

    • Author(s)
      Yasunari Nagai
    • Organizer
      Algebraic Geometry workshop in Bologna
    • Invited / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-22K03240
  • [Presentation] Rational normal quintics on a cubic 4-fold and related coherent sheaves2019

    • Author(s)
      Yasunari Nagai
    • Organizer
      Japanese-European Symposium on Symplectic Varieties and Moduli Spaces, Fourth Edition
    • Invited / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-17K05212
  • [Presentation] Symmetric Products of a semistable degeneration of surfaces2017

    • Author(s)
      Yasunari Nagai
    • Organizer
      Workshop on Fano Varieties and Calabi-Yau Varieties
    • Place of Presentation
      神戸大学
    • Invited
    • Data Source
      KAKENHI-PROJECT-26800025
  • [Presentation] Symmetric products of a semistable degeneration of surfaces2015

    • Author(s)
      Yasunari Nagai
    • Organizer
      Mini-Conference on Algebraic Geometry
    • Place of Presentation
      National Taiwan University, 台湾
    • Year and Date
      2015-03-06
    • Invited
    • Data Source
      KAKENHI-PROJECT-26800025
  • [Presentation] Symmetric product of a semistable degeneration of surfaces2015

    • Author(s)
      永井 保成
    • Organizer
      Japanese-European Symposium on Symplectic Varieties and Moduli Spaces
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2015-10-30
    • Invited
    • Data Source
      KAKENHI-PROJECT-26800025
  • [Presentation] Symmetric product of a semistable degeneration of surfaces2015

    • Author(s)
      永井 保成
    • Organizer
      高次元代数多様体の特異点と不変量
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2015-12-17
    • Invited
    • Data Source
      KAKENHI-PROJECT-26800025
  • [Presentation] Abelian fibrations and Lagrangian fibrations2012

    • Author(s)
      Yasunari Nagai
    • Organizer
      KIAS Winter School on Algebraic Geometry
    • Place of Presentation
      韓国 Duksan
    • Data Source
      KAKENHI-PROJECT-22740004
  • [Presentation] Computing classical invariant rings with application to moduli spaces2012

    • Author(s)
      永井 保成
    • Organizer
      第57回代数学シンポジウム
    • Data Source
      KAKENHI-PROJECT-22740004
  • [Presentation] Computing classical invariant rings with application to moduli spaces2012

    • Author(s)
      永井 保成
    • Organizer
      第57回代数学シンポジウム
    • Place of Presentation
      京都大学
    • Invited
    • Data Source
      KAKENHI-PROJECT-22740004
  • [Presentation] An explicit study of O'Grady's examples2010

    • Author(s)
      永井保成
    • Organizer
      都の西北代数幾何学シンポジウム
    • Place of Presentation
      早稲田大学
    • Year and Date
      2010-10-12
    • Data Source
      KAKENHI-PROJECT-22740004
  • [Presentation] An explicit study of non-locally free locus of O'Grady's example2010

    • Author(s)
      Yasunari Nagai
    • Organizer
      Miniworkshop on holomorphic symplectic geometry
    • Place of Presentation
      韓国・高等科学院(KIAS)
    • Data Source
      KAKENHI-PROJECT-22740004
  • [Presentation] An explicit study of O'Grady's examles2010

    • Author(s)
      Yasunari Nagai
    • Organizer
      都の西北 代数幾何学シンポジウム
    • Place of Presentation
      早稲田大学
    • Data Source
      KAKENHI-PROJECT-22740004

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