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Inductions and restrictions for representations of real reductive Lie groups

Research Project

Project/Area Number 16K17562
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Algebra
Research InstitutionOsaka University (2017-2019)
The University of Tokyo (2016)

Principal Investigator

Oshima Yoshiki  大阪大学, 情報科学研究科, 准教授 (10746936)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords表現論 / Lie群 / 誘導表現 / 分岐則 / ユニタリ表現 / 指標 / 簡約群 / 誘導 / 制限 / Plancherel測度 / 余随伴軌道 / 等質空間 / リー群 / 調和解析
Outline of Final Research Achievements

The aim of this study is to understand the relationship between characters, inductions and restrictions of unitary representations and the orbit method for Lie groups. We obtained a formula for the Fourier transform of Harish-Chandra characters of unitary representations corresponding to semisimple orbits and minimal representations in terms of the corresponding coadjoint orbits. We also obtained a result about the asymptotic support of Plancherel measures for homogeneous spaces.

Academic Significance and Societal Importance of the Research Achievements

数学や自然科学に現れる対称性は、数学において群の作用という言葉で記述され、それを線型化したものが群の表現である。その中で連続的な対称性を扱うのがLie群である。特に、表現の指標、またLie群とその部分群が与えられたとき、部分群の表現からもとの表現を構成する誘導という操作、またもとの群の表現から部分群の表現を得る制限という操作について理解することは、Lie群の表現論や調和解析における基本的テーマである。本研究ではこれらのLie群の表現に関する事柄について、軌道の方法とよばれる、Lie環の双対空間への群の作用と関連づけて新たな情報を得た。

Report

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

    (22 results)

All 2019 2018 2017 2016 Other

All Int'l Joint Research (1 results) Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (19 results) (of which Int'l Joint Research: 8 results,  Invited: 14 results)

  • [Int'l Joint Research] Cornell University(米国)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Collapsing K3 surfaces and Moduli compactification2018

    • Author(s)
      Yuji Odaka, Yoshiki Oshima
    • Journal Title

      Proceedings of the Japan Academy, Series A

      Volume: 94 Issue: 8 Pages: 81-86

    • DOI

      10.3792/pjaa.94.81

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Determinant formula for parabolic Verma modules of Lie superalgebras2018

    • Author(s)
      Yoshiki Oshima, Masahito Yamazaki
    • Journal Title

      Journal of Algebra

      Volume: 495 Pages: 51-80

    • DOI

      10.1016/j.jalgebra.2017.11.011

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 等質空間の Plancherel 測度の漸近的台について2019

    • Author(s)
      大島芳樹
    • Organizer
      日本数学会2019年度秋季総合分科会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Unitary representations of real reductive groups and the method of coadjoint orbits2019

    • Author(s)
      Yoshiki Oshima
    • Organizer
      Representation Theory of Algebraic Groups and Quantum Groups
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Cohomological representations of symplectic groups2019

    • Author(s)
      Yoshiki Oshima
    • Organizer
      22nd Autumn Workshop on Number Theory
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 等質空間上のPlancherel測度の漸近的台について2019

    • Author(s)
      大島芳樹
    • Organizer
      表現論と微分方程式論の広がり
    • Related Report
      2019 Annual Research Report
  • [Presentation] Collapsing of Kahler-Einstein metrics and Satake compactifications of moduli spaces2019

    • Author(s)
      Yoshiki Oshima
    • Organizer
      Algebraic Lie Theory and Representation Theory
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Compactifications of locally symmetric spaces and Gromov-Hausdorff limits of K3 surfaces2019

    • Author(s)
      Yoshiki Oshima
    • Organizer
      第25回複素幾何シンポジウム
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Compactifications of locally symmetric spaces and Gromov-Hausdorff limits of K3 surfaces2019

    • Author(s)
      大島芳樹
    • Organizer
      Arithmetic Geometry and Representation Theory
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Collapsing Kahler-Einstein metrics, tropical geometry and moduli compactifications2019

    • Author(s)
      Yoshiki Oshima
    • Organizer
      若者のための現代幾何入門
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] On the asymptotic support of Plancherel measures for homogeneous spaces2019

    • Author(s)
      Yoshiki Oshima
    • Organizer
      Representation theory of reductive Lie groups and algebras
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On the annihilator ideal of induced representations2018

    • Author(s)
      Yoshiki Oshima
    • Organizer
      Seminar at University of Paderborn
    • Related Report
      2018 Research-status Report
  • [Presentation] 漸近的Plancherel公式について2018

    • Author(s)
      Yoshiki Oshima
    • Organizer
      Workshop on "Actions of Reductive Groups and Global Analysis"
    • Related Report
      2018 Research-status Report
  • [Presentation] On the asymptotic support of Plancherel measures for homogeneous spaces2018

    • Author(s)
      Yoshiki Oshima
    • Organizer
      The Legacy of Joseph Fourier after 250 years
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 局所対称空間のコンパクト化とK3曲面のGromov-Hausdorff収束2018

    • Author(s)
      Yoshiki Oshima
    • Organizer
      阪大幾何セミナー
    • Related Report
      2018 Research-status Report
  • [Presentation] 誘導表現の零化イデアルについて2018

    • Author(s)
      Yoshiki Oshima
    • Organizer
      Langlands and Harmonic Analysis
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] Characters of minimal representations and minimal nilpotent orbits2017

    • Author(s)
      Yoshiki Oshima
    • Organizer
      表現論とその周辺分野の広がり
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] ユニタリ表現の指標と軌道の方法2017

    • Author(s)
      Yoshiki Oshima
    • Organizer
      代数学シンポジウム
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] The orbit method and characters of representations for real reductive groups2017

    • Author(s)
      Yoshiki Oshima
    • Organizer
      Quantum geometric and algebraic representation theory
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 実簡約Lie群のユニタリ表現と軌道法2016

    • Author(s)
      大島芳樹
    • Organizer
      日本数学会2016年度秋季総合分科会
    • Place of Presentation
      関西大学 大阪府吹田市
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] The orbit method and characters of representations for real reductive groups2016

    • Author(s)
      大島芳樹
    • Organizer
      Harmonic analysis on Lie groups and group algebras of locally compact groups
    • Place of Presentation
      TSIMF Sanya (China)
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited

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Published: 2016-04-21   Modified: 2021-02-19  

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