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Research on classification and constructions of automorphic representations using liftings

Research Project

Project/Area Number 19K14494
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

ATOBE Hiraku  北海道大学, 理学研究院, 准教授 (50837284)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
KeywordsJacquet加群 / Aubert双対 / 局所Aパケット / Harder予想 / 局所新形式 / 基本補題 / ラダー表現 / Arthur型表現 / 新形式 / 既約表現の微分 / 局所A-パケット / 宮脇リフト / Arthur分類 / ラングランズ対応 / Aパケット
Outline of Research at the Start

本研究では、宮脇リフトと呼ばれる保型形式を構成し、調べることを目的とする。保型形式とは豊富な対称性を持つ関数であり、一般に保型形式を構成することは難解な問題である。宮脇リフトとは、より高次元に定義される小さい保型形式を制限することによって得られる保型形式である。宮脇リフトの研究は最も低次元の時に池田氏により始められたが、本研究では高次元化を目指す。
また、宮脇リフトにおける局所理論の改築も行う。局所理論における最も低次元の場合は申請者によって得られた。本研究では、それを高次元化し、その性質を調べる。

Outline of Final Research Achievements

The purpose of this research is classification and constructions of automorphic representations. Automorphic representations are a generalization of modular forms. Especially, I studied about Arthur's multiplicity formula and related topics. One of few ways to construct automorphic representations concretely is liftings. Arthur's multiplicity formula is a generalization of several existence theorems of liftings. The greatest achievement of this research is to give an explicit and available construction of the local A-packets, which are the most mysterious objects appearing in Arthur's multiplicity formula.
As an application of liftings, I also gave some new examples for Harder's conjecture, which is a congruence problem on modular forms.

Academic Significance and Societal Importance of the Research Achievements

モジュラー形式は豊富な対称性を持つ関数であり、その最も典型的な例は志村・谷山予想により、暗号理論でも活躍する楕円曲線と対応している。この対応によって、フェルマーの最終定理が証明されたのは有名である。本研究の目的はモジュラー形式やその一般化である保型表現を分類・構成することである。
保型表現の分類には、アーサーの重複度公式と呼ばれるものが存在する。しかし本研究の前には、この公式は応用可能な代物ではなかった。本研究において、この公式を詳しく調べることで、多くの応用が得られるところまで辿り着いた。この研究は将来に難解な暗号理論を構築する際に役に立つかもしれない。

Report

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

    (38 results)

All 2024 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (3 results) Journal Article (11 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 10 results,  Open Access: 2 results) Presentation (23 results) (of which Int'l Joint Research: 11 results,  Invited: 13 results) Remarks (1 results)

  • [Int'l Joint Research] ウィーン大学(オーストリア)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Middle East Technical University(トルコ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ウィーン大学(オーストリア)

    • Related Report
      2020 Research-status Report
  • [Journal Article] An Analogue of Ladder Representations for Classical Groups2024

    • Author(s)
      Atobe Hiraku
    • Journal Title

      International Mathematics Research Notices

      Volume: - Issue: 9 Pages: 7891-7913

    • DOI

      10.1093/imrn/rnae004

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The set of local A-packets containing a given representation2023

    • Author(s)
      Atobe Hiraku
    • Journal Title

      Journal fur die reine und angewandte Mathematik (Crelles Journal)

      Volume: 0 Issue: 0 Pages: 263-286

    • DOI

      10.1515/crelle-2023-0073

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The explicit Zelevinsky-Aubert duality2023

    • Author(s)
      Atobe Hiraku、Minguez Alberto
    • Journal Title

      Compositio Mathematica

      Volume: 159 Issue: 2 Pages: 380-418

    • DOI

      10.1112/s0010437x22007904

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Harder's conjecture I2023

    • Author(s)
      ATOBE Hiraku、CHIDA Masataka、IBUKIYAMA Tomoyoshi、KATSURADA Hidenori、YAMAUCHI Takuya
    • Journal Title

      Journal of the Mathematical Society of Japan

      Volume: 75 Issue: 4 Pages: 1339-1408

    • DOI

      10.2969/jmsj/87988798

    • ISSN
      0025-5645, 1881-1167, 1881-2333
    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On the socles of certain parabolically induced representations of p-adic classical groups2022

    • Author(s)
      Atobe Hiraku
    • Journal Title

      Representation Theory of the American Mathematical Society

      Volume: 26 Issue: 18 Pages: 515-541

    • DOI

      10.1090/ert/612

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Construction of local A-packets2022

    • Author(s)
      Atobe Hiraku
    • Journal Title

      Journal fur die reine und angewandte Mathematik (Crelles Journal)

      Volume: 2022 Issue: 790 Pages: 1-51

    • DOI

      10.1515/crelle-2022-0030

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Local newforms for the general linear groups over a non-archimedean local field2022

    • Author(s)
      Atobe Hiraku、Kondo Satoshi、Yasuda Seidai
    • Journal Title

      Forum of Mathematics, Pi

      Volume: 10

    • DOI

      10.1017/fmp.2022.17

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On an algorithm to compute derivatives2021

    • Author(s)
      Atobe Hiraku
    • Journal Title

      manuscripta mathematica

      Volume: 167 Issue: 3-4 Pages: 721-763

    • DOI

      10.1007/s00229-021-01285-8

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] A theory of Miyawaki liftings: the Hilbert?Siegel case2020

    • Author(s)
      Atobe Hiraku
    • Journal Title

      Mathematische Annalen

      Volume: 376 Issue: 3-4 Pages: 1467-1535

    • DOI

      10.1007/s00208-019-01946-w

    • NAID

      120007000857

    • Related Report
      2020 Research-status Report
  • [Journal Article] On the non-vanishing of theta liftings of tempered representations of U(p,q)2020

    • Author(s)
      Atobe Hiraku
    • Journal Title

      Advances in Mathematics

      Volume: 363 Pages: 106984-106984

    • DOI

      10.1016/j.aim.2020.106984

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Jacquet modules and local Langlands correspondence2020

    • Author(s)
      Atobe Hiraku
    • Journal Title

      Inventiones mathematicae

      Volume: 219 Issue: 3 Pages: 831-871

    • DOI

      10.1007/s00222-019-00918-w

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Local newforms for unramified even unitary groups2024

    • Author(s)
      跡部発
    • Organizer
      Langlands and Harmonic Analysis (第7回)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Local newforms for unramified odd unitary groups2023

    • Author(s)
      Hiraku Atobe
    • Organizer
      Conference on Harish-Chandra Representation Theory & Harmonic Analysis
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 古典群のladder表現について2023

    • Author(s)
      跡部発
    • Organizer
      Langlands and Harmonic Analysis 第6回
    • Related Report
      2022 Research-status Report
  • [Presentation] Computation of local A-packets in Sage2022

    • Author(s)
      Hiraku Atobe
    • Organizer
      Workshop on "Arthur packets and related problems"
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Local newforms for unramified odd unitary groups2022

    • Author(s)
      跡部発
    • Organizer
      2022年日本数学会秋季総合分科会
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] p-進シンプレクティック群におけるArthur型の表現の決定2022

    • Author(s)
      跡部発
    • Organizer
      京都大学談話会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 古典群の Jacquet 加群について2022

    • Author(s)
      跡部発
    • Organizer
      第5回数理新人セミナー
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 局所A-パケットの構成について2021

    • Author(s)
      跡部発
    • Organizer
      早稲田大学整数論セミナー
    • Related Report
      2021 Research-status Report
  • [Presentation] Construction of local A-packets2021

    • Author(s)
      跡部発
    • Organizer
      Automorphic Forms, Geometry and Arithmetic
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Local newforms for GL(n)2021

    • Author(s)
      跡部発
    • Organizer
      金沢整数論オータムワークショップ 2021
    • Related Report
      2021 Research-status Report
  • [Presentation] On the socles of certain parabolically induced representations of p-adic classical groups2021

    • Author(s)
      跡部発
    • Organizer
      Seminar on Representation Theory and Algebraic Geometry, in The Weizmann Institute of Science
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Local newforms for GL(n)2021

    • Author(s)
      跡部発
    • Organizer
      Sheffield Number Theory Seminar
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On the socles of certain parabolically induced representations of p-adic classical groups2021

    • Author(s)
      跡部発
    • Organizer
      2021 年度表現論シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] The Zelevinsky-Aubert duality for classical groups2021

    • Author(s)
      跡部発
    • Organizer
      Seminaire de l'equipe GAGALie, in The University of Poitiers
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On the socles of certain parabolically induced representations of p-adic classical groups2021

    • Author(s)
      跡部発
    • Organizer
      8th Kyoto conference on automorphic forms
    • Related Report
      2021 Research-status Report
  • [Presentation] The Zelevinsky-Aubert duality for classical groups2021

    • Author(s)
      跡部発
    • Organizer
      RIMS共同研究(公開型)「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
  • [Presentation] The Zelevinsky-Aubert duality for classical groups2021

    • Author(s)
      跡部発
    • Organizer
      Seminars, in the University of Utah
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Construction of local A-packets2021

    • Author(s)
      跡部発
    • Organizer
      Automorphic Project & Research Seminar
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Construction of local A-packets2021

    • Author(s)
      跡部発
    • Organizer
      Langlands and Harmonic Analysis(第5回)
    • Related Report
      2020 Research-status Report
  • [Presentation] On Jantzen's algorithm to compute derivatives2020

    • Author(s)
      跡部発
    • Organizer
      7th Kyoto conference on automorphic forms
    • Related Report
      2020 Research-status Report
  • [Presentation] The Zelevinsky-Aubert duality for classical groups2020

    • Author(s)
      跡部発
    • Organizer
      Seminar ``Representation Theory and Automorphic Forms'', in University of Vienna
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Jacquet加群と局所Langlands対応2019

    • Author(s)
      跡部発
    • Organizer
      2019年度秋季総合分科会・代数学分科会特別講演
    • Related Report
      2019 Research-status Report
    • Invited
  • [Presentation] Introduction to Arthur's multiplicity formula2019

    • Author(s)
      跡部発
    • Organizer
      22nd Autumn Workshop on Number Theory
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Remarks] atobe31 / Local-A-packets

    • URL

      https://github.com/atobe31/Local-A-packets

    • Related Report
      2021 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2025-01-30  

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