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

Siegel modular forms and algebraic modular forms

Research Project

Project/Area Number 19K03424
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11010:Algebra-related
Research InstitutionOsaka University

Principal Investigator

Ibukiyama Tomoyoshi  大阪大学, その他部局等, 名誉教授 (60011722)

Project Period (FY) 2019-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsジーゲル保型形式 / 代数的的保型形式 / 保型形式の次元公式 / 超特異アーベル多様体 / ゼータ関数 / 保型形式の合同 / 保型形式上の微分作用素 / ラングランズ予想 / パラモジュラー保型形式 / 次元公式 / 代数的保型形式 / 微分作用素 / パラモジュラー形式 / 種の理論 / L 関数 / モジュライ / 類数 / 4元数的エルミート形式 / 特殊関数論 / 類数公式 / pullback formula / アイゼンシュタイン級数 / 特殊多項式 / 4元数的エルミート群 / アーベル多様体 / 四元数的エルミート形式 / 保型的微分作用素
Outline of Research at the Start

保型形式とはある種の高度な対称性を持つ解析関数のことで、数の存在の様子を記述するガロア表現や整数論と深く関わる対象である。本研究は定義も見かけも異なる保型形式が、実は本質的には全く同じ重要なデータを内包するという何種類かの観察を精密化し、証明しようとする試みである。その過程で自然に現れる微分作用素や特殊関数論も研究する。以上の対象は暗号理論にも利用される超特異幾何学を記述する算術的手段にもなっている。これらの多くの数学的対象の重層的交わりを総合的に研究する。

Outline of Final Research Achievements

Dimension formulas of eigenspaces of the Atkin-Lehner involution of vector valued paramodular forms of degree two such that the determinant part of the weight is not less than 3 was given explicitly.
Configuration of the moduli locus of principally polarized super-singular abelian varieties of dimension less than 4 corresponding to each a-number was shown to be characterized by parahoric subgroups of quaternion hermitian groups.
We have shown that among linear differential operators with constant coefficients acting on functions of the Siegel upper half space,those that preserves automorphy under the restriction of the diagonal blocks have certain canonical basis which are characterized only by the action on the automorphy factor, and explicit formula for the generating series of the canonical basis was given. We applied it to prove a part of the Harder conjecture on congruences jointly with Atobe, Chida, Katsurada, and Yamauchi,

Academic Significance and Societal Importance of the Research Achievements

パラモジュラー形式については1変数の志村・谷山予想の類似で、有理数体上定義されたアーベル曲面のゼータ関数がウェイト2のもので与えられるという Brumer の予想があり、 Poor, Yuen などが、ウェイト3以上のデータを用いて数値実験を行っている。我々の結果はこれに直接的な影響を与えている。超特異アーベル多様体のモジュライについては、一般次元の細かい一般論への基礎が低次元で検証された形になっている。我々の微分作用素の理論は次数2のヤコービ形式の決定、L 関数の特殊値、Harder 予想、周期に関する予想、slope の評価、など様々な数学での欠くことのできない道具として使用されている。

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

    (55 results)

All 2024 2023 2022 2021 2020 2019 2017 Other

All Int'l Joint Research (14 results) Journal Article (17 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 12 results,  Open Access: 11 results) Presentation (18 results) (of which Int'l Joint Research: 12 results,  Invited: 15 results) Remarks (5 results) Funded Workshop (1 results)

  • [Int'l Joint Research] ローマ大学(イタリア)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] アメリカ数学研究所/ニューヨーク州立大学ストーニーブルック(米国)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] 中央研究院(その他の国・地域(台湾))

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] マックスプランク研究所(ドイツ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] ユトレヒト大学(オランダ)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Univ.Roma, Sapienza(イタリア)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Univ. Utrecht(オランダ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Fordham Univ./American Institute of Mathematics/Stony Brook Univ.(米国)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] 台湾中央研究院(その他の国・地域)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] Max Planck Institute for mathematics(ドイツ)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] 台湾アカデミア・シニカ(中国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] ユトレヒト大学(オランダ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Internat. Center of Theor. Physics(イタリア)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Academia Sinica(その他の国・地域(台湾))

    • Related Report
      2019 Research-status Report
  • [Journal Article] Differentiating Siegel Modular Forms and the Moving Slope of A_g2023

    • Author(s)
      S. Grushevsky、T. Ibukiyama、G. Mondello、R. Salvati Manni
    • Journal Title

      International Mathematics Research Notices

      Volume: 2024 Issue: 4 Pages: 3442-3486

    • DOI

      10.1093/imrn/rnad203

    • Related Report
      2023 Annual Research 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
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Differential operators on Siegel modular forms and automorphy factors2023

    • Author(s)
      T. Ibukiyama
    • Journal Title

      RIMS Kokyuroku

      Volume: 2264 Pages: 210-225

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] Supersingular abelian varieties and quaternion hermitian lattices2022

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      RIMS Kokyuroku Bessatsu

      Volume: B90 Pages: 17-37

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] SUPERSINGULAR LOCI OF LOW DIMENSIONS AND PARAHORIC SUBGROUPS2022

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      Osaka Journal of Mathematics

      Volume: 59 Issue: 3 Pages: 703-726

    • DOI

      10.18910/88493

    • ISSN
      00306126
    • URL

      https://ocu-omu.repo.nii.ac.jp/records/2010892

    • Related Report
      2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Differential operators, exact pullback formulas of Eisenstein series, and Laplace transforms2022

    • Author(s)
      Ibukiyama Tomoyoshi
    • Journal Title

      Forum Mathematicum

      Volume: - Issue: 3 Pages: 685-710

    • DOI

      10.1515/forum-2021-0162

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Some Poisson Formula on Tube Domains2021

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      Commentarii mathematici Universitatis Sancti Pauli = Rikkyo Daigaku sugaku zasshi

      Volume: 69 Pages: 43-50

    • DOI

      10.14992/00021298

    • NAID

      120007191432

    • URL

      http://id.nii.ac.jp/1062/00021298/

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pullback formula and applications2021

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      京都大学数理解析研究所講究録

      Volume: 2197 Pages: 184-198

    • NAID

      40022810293

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Journal Article] Principal polarizations of supersingular abelian surfaces2020

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      Journal of the Mathematical Society of Japan

      Volume: 72 Issue: 4 Pages: 1161-1180

    • DOI

      10.2969/jmsj/82528252

    • NAID

      130007928973

    • ISSN
      0025-5645, 1881-1167, 1881-2333
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Generic differential operators on Siegel modular forms and special polynomials2020

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      Selecta Mathematica (N.S.)

      Volume: 5-66 Issue: 5 Pages: 1-50

    • DOI

      10.1007/s00029-020-00593-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Graded rings of modular forms of rational weights2020

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      Research in Number Theory

      Volume: 6-8 Issue: 1 Pages: 1-13

    • DOI

      10.1007/s40993-019-0183-9

    • Related Report
      2020 Research-status Report 2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Siegel modular forms and special polynomials2020

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      数理解析研究所講究録

      Volume: 2148 Pages: 66-79

    • NAID

      120006888307

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Journal Article] Siegel modular forms and special polynomials2020

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      京都大学数理解析研究所講究録

      Volume: 2148 Pages: 66-79

    • NAID

      120006888307

    • Related Report
      2019 Research-status Report
  • [Journal Article] One-line formula for automorphic differentail operators on Siegel modular forms2019

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      Abhand. Math. Semin. Univ. Hamburg

      Volume: 89 Issue: 1 Pages: 17-43

    • DOI

      10.1007/s12188-019-00202-x

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Quinary lattices and binary quaternion hermitian lattices2019

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      Tohoku Math. J. (2)

      Volume: 71 Pages: 207-220

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Ihara lifts and conjectural correspondences between symplectic automorphic forms of genus two2019

    • Author(s)
      Tomoyoshi Ibukiyama
    • Journal Title

      京都大学数理解析研究所講究録

      Volume: 2120 Pages: 61-71

    • Related Report
      2019 Research-status Report
  • [Journal Article] Constructions of theta series of any vector valued weight and applications to lifts and congruences2017

    • Author(s)
      Tomoyoshi Ibukiyama and Sho Takemori
    • Journal Title

      Experimental Mathematics

      Volume: - Issue: 1 Pages: 95-114

    • DOI

      10.1080/10586458.2017.1353454

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Differential operators on automorphic forms, special functions, and arithmetic applications,2024

    • Author(s)
      伊吹山知義
    • Organizer
      第3回仙台保型形式ミニ研究集会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Dimension formulas of paramodular forms with involution2024

    • Author(s)
      T. Ibukiyama
    • Organizer
      RIMS conference "Reseach on automorphic forms"
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Genus Character L-functions of Non-maximal Quadratic Orders2023

    • Author(s)
      T. Ibukiyama
    • Organizer
      Academia Sinica(Taipei), Seminar on algebraic geometry
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Dimensions of paramodular forms and algebraic modular forms with involution2023

    • Author(s)
      T. Ibukiyama
    • Organizer
      Academia Sinica(Taipei), Seminar on algebraic geometry
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Dimensions of paramodular forms with Atkin-Lehner sign,2023

    • Author(s)
      T. Ibukiyama
    • Organizer
      Arithmetic, Geometry, Cryptography and Coding theory, CIRM, France
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Genus character L functions of non-maximal quadratic orders and adeles2023

    • Author(s)
      伊吹山知義
    • Organizer
      日本数学会総合分科会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Differential operators on Siegel modular forms and Laplace transforms2023

    • Author(s)
      T. Ibukiyama
    • Organizer
      数理解析研究所研究集会
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Genus character $L$ functions of quadratic order in an adelic way2023

    • Author(s)
      T. Ibukiyama
    • Organizer
      Arithmetic Seminar Day in Toyonaka
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 符号付きパラモジュラー形式の次元公式2023

    • Author(s)
      伊吹山知義
    • Organizer
      日本数学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] ジーゲル保形形式上の微分作用素とラプラス変換2023

    • Author(s)
      伊吹山知義
    • Organizer
      日本数学会年会
    • Related Report
      2022 Research-status Report
  • [Presentation] Survey on quaternion hermitian lattices and its application to supersingular abelian varieties2021

    • Author(s)
      Tomoyoshi Ibukiyama
    • Organizer
      CIRM Luminy workshop: Arithmetic, Geometry, Cryptography and Coding theory
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Supersingular loci of low dimensions and parahoric subgroups2020

    • Author(s)
      Tomoyoshi Ibukiyama
    • Organizer
      京大数理解析研究所研究集会 「超特異曲線・超特異アーベル多様体の 理論と応用」
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Automorphic differential operators and special functions2020

    • Author(s)
      Tomoyoshi Ibukiyama
    • Organizer
      Integrable Systems and automorphic forms (Sirius Math. Center, Russia)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Pullback formulas and applications2020

    • Author(s)
      Tomoyoshi Ibukiyama
    • Organizer
      Analytic, geometric and p-adic aspect of automorphic forms and L functions (RIMS, Kyoto)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A new pullback formula and a half integral version of Harder's conjecture on congruences2019

    • Author(s)
      Tomoyoshi Ibukiyama
    • Organizer
      Modular Forms, Oberwolfach workshop(Germany)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Supersingular abelian surfaces, automorphisms, and the trace formulas2019

    • Author(s)
      Tomoyoshi Ibukiyama
    • Organizer
      Supersingular abelian varieties and related arithmetics(Nagoya)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A survey on polarizations of superspecial abelian varieties and the field of definition2019

    • Author(s)
      Tomoyoshi Ibukiyama
    • Organizer
      Supersingular abelian varieties and related arithmetics(Nagoya)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] A survey on quaternion hermitian lattices and algebraic modular forms2019

    • Author(s)
      Tomoyoshi Ibukiyama
    • Organizer
      Supersingular abelian varieties and related arithmetics(Nagoya)
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Remarks] 伊吹山知義 オフィシャルサイト

    • URL

      http://www4.math.sci.osaka-u.ac.jp

    • Related Report
      2023 Annual Research Report
  • [Remarks] 伊吹山知義オフィシャルサイト

    • URL

      http://www4.math.sci.osaka-u.ac.jp/~ibukiyam/

    • Related Report
      2022 Research-status Report
  • [Remarks] 伊吹山知義 オフィシャルサイト

    • Related Report
      2021 Research-status Report
  • [Remarks] 伊吹山知義オフィシャルサイト

    • URL

      http://www4.math.sci.osaka-u.ac.jp/~ibukiyama

    • Related Report
      2020 Research-status Report
  • [Remarks] 伊吹山知義 オフィシャルサイト

    • URL

      http://www4.math.sci.osaka-u.ac.jp/~ibukiyam

    • Related Report
      2019 Research-status Report
  • [Funded Workshop] Supersingular abelian varieties and related arithmetics2019

    • Related Report
      2019 Research-status Report

URL: 

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

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi