• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Study of the Langlands functoriality via an explicit local Langlands correspondence

Research Project

Project/Area Number 20K14287
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Oi Masao  京都大学, 白眉センター, 特定助教 (40868171)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2023: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
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: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywords局所Langlands対応 / Langlands関手性 / 正則超尖点表現 / Harish-Chandra指標 / エンドスコピー / Swan導手 / 相対Langlands対応 / beyond endoscopy / Swan 導手
Outline of Research at the Start

本研究の目的は,Langlands関手性と呼ばれる表現論的現象を,明示的局所Langlands対応の理論によって調べることである.
具体的には,Langlands関手性と特別表現の関係を記述するPrasadの予想の解決と,beyond endoscopyの指標関係式の定式化を目指す.
このいずれの問題に関しても,まずは正則超尖点表現と呼ばれる表現の場合に起こる現象を,Kaletha氏によって確立された明示的局所Langlands対応の理論を用いて調べる.そしてそれを元に,一般の場合における精密な予想を定式化して証明する,という流れで取り組む予定である.

Outline of Final Research Achievements

We studied the local Langlands correspondence and the Langlands functoriality for supercuspidal representations via harmonic analysis by noting the Harish-Chandra characters. In particular, we established the twisted character formula and the twisted endoscopic character relation for toral supercuspidal representations and obtained a precise description of the local Langlands correspondence for simple supercuspidal representations. We also established a simple characterization of supercuspidal representations in terms of Harish-Chandra characters. As related problems, we also studied the functorial behavior of Swan conductors of Galois representations and a new formulation of the local Langlands correspondence from a geometric perspective.

Academic Significance and Societal Importance of the Research Achievements

本研究で得られた局所Langlands対応の定式化に関する成果は,Langlands関手性に関連する諸問題の根本に関わるものである.またtoral型超尖点表現や単純超尖点表現に関する明示的局所Langlands対応に関する成果は,これまで知られていなかったクラスの具体例を,きわめて精密なレベルで与えるものである.これらを踏まえると,今回の研究成果は単なる興味深い結果には留まらず,今後Langlands関手性やより一般にp進簡約群の表現論に関する研究が分野として展開されてゆく中で,実用性を発揮すると期待している.

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

    (40 results)

All 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (6 results) Journal Article (7 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 7 results,  Open Access: 2 results) Presentation (23 results) (of which Int'l Joint Research: 13 results,  Invited: 19 results) Remarks (4 results)

  • [Int'l Joint Research] University of Michigan/Queens College(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Universite Paris-Saclay(フランス)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Bar Ilan University(イスラエル)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Universite Paris-Saclay(フランス)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Bar Ilan University(イスラエル)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Queens College(米国)

    • Related Report
      2022 Research-status Report
  • [Journal Article] On Swan exponents of symmetric and exterior square Galois representations2024

    • Author(s)
      Henniart Guy、Oi Masao
    • Journal Title

      Rad Hrvatske akademije znanosti i umjetnosti. Matematicke znanosti

      Volume: 28 Pages: 151-184

    • DOI

      10.21857/yvjrdcde6y

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Geometric $L$-packets of Howe-unramified toral supercuspidal representations2023

    • Author(s)
      Chan Charlotte、Oi Masao
    • Journal Title

      Journal of the European Mathematical Society

      Volume: - Issue: 4 Pages: 1465-1526

    • DOI

      10.4171/jems/1396

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Iwahori-Hecke algebra and unramified local L-functions2023

    • Author(s)
      Oi Masao、Sakamoto Ryotaro、Tamori Hiroyoshi
    • Journal Title

      Mathematische Zeitschrift

      Volume: 303 Issue: 3

    • DOI

      10.1007/s00209-023-03214-9

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Depth-preserving property of the local Langlands correspondence for quasi-split classical groups in large residual characteristic2022

    • Author(s)
      Oi Masao
    • Journal Title

      manuscripta mathematica

      Volume: - Issue: 3-4 Pages: 529-562

    • DOI

      10.1007/s00229-022-01397-9

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Simple supercuspidal L-packets for quasi-split classical groups2022

    • Author(s)
      Masao Oi
    • Journal Title

      Memoirs of the American Mathematical Society

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Geometric L-packets of Howe-unramified toral supercuspidal representations2022

    • Author(s)
      Charlotte Chan and Masao Oi
    • Journal Title

      Journal of the European Mathematical Society

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Local Langlands Correspondence for Regular Supercuspidal Representations of GL(n)2020

    • Author(s)
      Oi Masao, Tokimoto Kazuki
    • Journal Title

      International Mathematics Research Notices

      Volume: 2021, 3 Issue: 3 Pages: 2007-2073

    • DOI

      10.1093/imrn/rnaa197

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] On the functorial behavior of Swan conductors of Galois representations2023

    • Author(s)
      大井雅雄
    • Organizer
      愛媛大学代数セミナー
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Characterization of supercuspidal representations via Harish-Chandra characters2023

    • Author(s)
      大井雅雄
    • Organizer
      RIMS研究集会「Recent developments in representation theory and related topics」
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] On explicit local Jacquet--Langlands correspondence for regular supercuspidal representations2023

    • Author(s)
      Masao Oi
    • Organizer
      The 5th Japan-Taiwan Number theory conference
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On explicit local Jacquet--Langlands correspondence for regular supercuspidal representations2023

    • Author(s)
      Masao Oi
    • Organizer
      Representations of reductive p-adic groups, L-functions and relative matters: a conference in honor of Guy Henniart
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On comparison of Kaletha's and Arthur's toral supercuspidal L-packets of classical groups2023

    • Author(s)
      Masao Oi
    • Organizer
      BIRS-IASM workshop "Arthur packets"
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] On explicit local Jacquet--Langlands correspondence for regular supercuspidal representations2023

    • Author(s)
      大井雅雄
    • Organizer
      RIMS研究集会「代数的整数論とその周辺2023」
    • Related Report
      2023 Annual Research Report
  • [Presentation] Several recent topics on the local Langlands conjecture2023

    • Author(s)
      Masao Oi
    • Organizer
      NTU Mathematics Colloquium
    • Related Report
      2023 Annual Research Report
  • [Presentation] Swan conductors of local Galois representations and their functorial lifts2023

    • Author(s)
      Masao Oi
    • Organizer
      Number Theory in Tokyo
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Characterization of supercuspidal representations via Harish-Chandra characters2022

    • Author(s)
      Masao Oi
    • Organizer
      Representations and Characters: Revisiting Some Aspects of the Works of Harish-Chandra and Weil
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Local Langlands correspondence for simple supercuspidal representations2022

    • Author(s)
      Masao Oi
    • Organizer
      Group, Lie and Number Theory (University of Michigan)
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] On B(G)-parametrization of the local Langlands correspondence2022

    • Author(s)
      Masao Oi
    • Organizer
      Mini-workshop on the geometrization of the local Langlands correspondences and related topics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A characterizing result on supercuspidal representations2022

    • Author(s)
      Masao Oi
    • Organizer
      The 7th KTGU Mathematics Workshop for Young Researchers
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On Iwahori-Hecke algebras and local L-factors of unramified representations2021

    • Author(s)
      Masao Oi
    • Organizer
      RIMS conference: Automorphic forms, automorphic L-functions, and its related topics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Several recent topics on the supercuspidal local Langlands correspondence2021

    • Author(s)
      Masao Oi
    • Organizer
      2021 Fall POSTECH-PMI Number Theory Seminar
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A recovering result of Deligne-Lusztig representations from their characters2021

    • Author(s)
      Masao Oi
    • Organizer
      The 3rd Kyoto-Hefei Workshop on Arithmetic Geometry
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Comparison of algebraic and geometric constructions of supercuspidal representations2021

    • Author(s)
      Masao Oi
    • Organizer
      The 9th East Asia Number Theory Conference
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 超尖点表現の代数的および幾何的構成の比較について2021

    • Author(s)
      大井雅雄
    • Organizer
      慶應代数セミナー
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Geometric L-packets of Howe-unramified toral supercuspidal representations I2021

    • Author(s)
      Masao Oi
    • Organizer
      Automorphic Project & Research Seminar
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Twisted endoscopic character relation for Kaletha's regular supercuspidal L-packets2021

    • Author(s)
      Masao Oi
    • Organizer
      RIMS研究集会「保型形式,保型表現,ガロア表現とその周辺」
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 有限簡約群のDeligne-Lusztig表現の指標について2020

    • Author(s)
      大井雅雄
    • Organizer
      京都大学数論合同セミナー
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 超尖点表現に対する局所Langlands対応について2020

    • Author(s)
      大井雅雄
    • Organizer
      第65回代数学シンポジウム
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] 超尖点表現の代数的および幾何的構成の比較について2020

    • Author(s)
      大井雅雄
    • Organizer
      神戸整数論ミニワークショップ
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Twisted endoscopic character relation for Kaletha's regular supercuspidal L-packets2020

    • Author(s)
      Masao Oi
    • Organizer
      MIT Lie Groups Seminar
    • Related Report
      2020 Research-status Report
    • Invited
  • [Remarks] Masao Oi (大井雅雄)

    • URL

      https://masaooi.github.io

    • Related Report
      2023 Annual Research Report
  • [Remarks] 大井 雅雄 (Masao Oi)

    • URL

      https://www.math.kyoto-u.ac.jp/~masaooi/j-index.html

    • Related Report
      2022 Research-status Report
  • [Remarks] Masao Oi (大井雅雄)

    • URL

      https://www.math.kyoto-u.ac.jp/~masaooi/

    • Related Report
      2021 Research-status Report
  • [Remarks] 大井 雅雄

    • URL

      https://www.math.kyoto-u.ac.jp/~masaooi/j-index.html

    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2025-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi