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Multiple hypergeometric series, screening operators and elliptic integrable systems associated with affine root systems

Research Project

Project/Area Number 19K03512
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 12010:Basic analysis-related
Research InstitutionThe University of Tokyo

Principal Investigator

Junichi Shiraishi  東京大学, 大学院数理科学研究科, 准教授 (20272536)

Project Period (FY) 2019-04-01 – 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: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2022: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Keywordsaffine Laumon space / Ruijsenaars system / affine screenings / q-Painleve VI equation / Shakirov equation / q-KZ equation / affine Laumon空間 / Macdonald多項式 / 差分Painleve方程式 / 量子Painleve方程式 / q-KZ方程式 / Painleve VI 方程式 / 差分 Painleve 方程式 / アフィンLaumon空間 / 非定常差分方程式 / Ruijsenaars模型 / q 差分戸田方程式 / 非定常Ruijsenaars関数 / アフィン遮蔽作用素 / B型のq戸田作用素 / 隣接関係式 / affine screening / Ruijsenaars operator / affine Toda system / elliptic Calogero model
Outline of Research at the Start

本研究の概要を箇条書きする:
(1) affine screening operator、及び、それに付随する変形W代数の表現論の解析を通して、「非定常Ruijsenaars関数」の満たすべき「非定常楕円Ruijsenaars方程式」、を導出する。
(2) 非定常Ruijsenaars関数に関する双対性予想を証明する。
(3) affine Laumon spaceのde Rham複体の上に、量子トロイダル代数の表現を構成する。
(4) 非定常Ruijsenaars関数の定常極限について理解する。及び、その定常極限が楕円Ruijsenaars operatorの固有関数を与えることの証明を行う。

Outline of Final Research Achievements

We obtained several conjectures (duality conjectures, conjecture of non-stationary Ruijsenaars equation, conjecture for degeneration to the elliptic Ruijsenaars functions)
concerning the non-stationary Ruijsenaars functions. We establish the relation between the non-stationary difference equation proposed by S. Shakirov and the quantized discrete Painleve VI equation due to K. Hasegawa (quantization of Jimbo-Sakai's equation). We show that Shakirov’s non-stationary difference equation, when it is truncated, implies the quantum Knizhnik-Zamolodchikov (q-KZ) equation with generic spins. We prove that the affine Laumon partition function gives a solution to Shakirov’s equation.

Academic Significance and Societal Importance of the Research Achievements

楕円Ruijsenaars系の非定常方程類似と考えられる系に関する(実験的)研究を, affine Laumon空間の上の幾何学を用いて行なった. affine screening 作用素を用いて非定常Ruijsenaars関数を表現する可能性について, 一連の予想を得た. また, 非定常方程式はパンルベ方程式をその代表として含む重要な研究対象でもある. 本研究では, 量子q差分系における非定常方程式を発見し, その固有関数の明示的公式の持つ組合わせ的構造に関する研究を行なった. 今後も, affine Laumon空間の幾何学を軸として, さまざまな発見がもたらされると期待される.

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

    (24 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (7 results) Journal Article (5 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 5 results,  Open Access: 4 results) Presentation (12 results) (of which Int'l Joint Research: 7 results,  Invited: 6 results)

  • [Int'l Joint Research] IITP(ロシア連邦)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] KTH AlbaNova University(スウェーデン)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] IITP, Moscow(ロシア連邦)

    • Related Report
      2022 Research-status Report
  • [Int'l Joint Research] KTH AlbaNova University(スウェーデン)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] KTH AlbaNova University(スウェーデン)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] KTH(スウェーデン)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] HSE(ロシア連邦)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Non-Stationary Difference Equation and Affine Laumon Space: Quantization of Discrete Painlev? Equation2023

    • Author(s)
      Awata Hidetoshi, Hasegawa Koji, Kanno Hiroaki, Ohkawa Ryo, Shakirov Shamil, Shiraishi Jun'ichi, Yamada Yasuhiko
    • Journal Title

      Symmetry, Integrability and Geometry: Methods and Applications

      Volume: 19

    • DOI

      10.3842/sigma.2023.089

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Construction of Eigenfunctions for the Elliptic Ruijsenaars Difference Operators.2022

    • Author(s)
      Langmann, E., Noumi, M. & Shiraishi, J.
    • Journal Title

      Commun. Math. Phys.

      Volume: 391 Issue: 3 Pages: 901-950

    • DOI

      10.1007/s00220-021-04195-8

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Branching formula for q-Toda functions of type B.2021

    • Author(s)
      Hoshino, A., Ohkubo, Y. & Shiraishi, J.
    • Journal Title

      Lett Math Phys 111, 126 (2021).

      Volume: 111 Issue: 5 Pages: 126-126

    • DOI

      10.1007/s11005-021-01461-7

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Basic Properties of Non-Stationary Ruijsenaars Functions2020

    • Author(s)
      Langmann Edwin、KTH Royal Institute of Technology, Sweden、Noumi Masatoshi、Shiraishi Junichi、KTH Royal Institute of Technology, Sweden、The University of Tokyo, Japan
    • Journal Title

      Symmetry, Integrability and Geometry: Methods and Applications

      Volume: 12

    • DOI

      10.3842/sigma.2020.105

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Affine screening operators, affine Laumon spaces and conjectures concerning non-stationary Ruijsenaars functions2019

    • Author(s)
      Jun'ichi Shiraishi
    • Journal Title

      Journal of Integrable Systems

      Volume: 4 Issue: 1

    • DOI

      10.1093/integr/xyz010

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Non-stationary difference equation, affine Laumon space and quantization of discrete Painleve equation 12023

    • Author(s)
      H. Awata, K. Hasegawa, H. Kanno, R. Ohkawa, S. Shakirov, J. Shiraishi, Y. Yamada
    • Organizer
      日本数学会(東北大)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Non-stationary difference equation, affine Laumon space and quantization of discrete Painleve equation 22023

    • Author(s)
      H. Awata, K. Hasegawa, H. Kanno, R. Ohkawa, S. Shakirov, J. Shiraishi, Y. Yamada
    • Organizer
      日本数学会(東北大)
    • Related Report
      2023 Annual Research Report
  • [Presentation] Conjectures concerning the non-stationary Ruijsenaars function2023

    • Author(s)
      J. Shiraishi
    • Organizer
      Integrable Systems & Symmetric Functions, Glasgow
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Discretization and quantization of Painleve VI equation2023

    • Author(s)
      J. Shiraishi
    • Organizer
      5th Bangkok Workshop on Discrete Geometry, Dynamics and Statistics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Quantization of Discrete Sixth Painleve Equation and Shakirov's Conjecture2022

    • Author(s)
      J. Shiraishi
    • Organizer
      2022 Workshop on Elliptic Integrable Systems
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 変形Koornwinder作用素とC型Macdonald多項式I2022

    • Author(s)
      大久保勇輔、白 石 潤 一、星 野 歩
    • Organizer
      日本数学会年会(埼玉大)
    • Related Report
      2021 Research-status Report
  • [Presentation] 変形Koornwinder作用素とC 型Macdonald多項式II2022

    • Author(s)
      大久保勇輔、白 石 潤 一、星 野 歩
    • Organizer
      日本数学会年会(埼玉大)
    • Related Report
      2021 Research-status Report
  • [Presentation] Quantization of Discrete Sixth Painleve Equation and Shakirov's Conjecture2022

    • Author(s)
      白 石 潤 一
    • Organizer
      2022 Workshop on Elliptic Integrable Systems
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] B型q-戸田関数の明示公式2021

    • Author(s)
      大久保勇輔、白 石 潤 一、星 野 歩
    • Organizer
      日本数学会秋季総合分科会(千葉大)
    • Related Report
      2021 Research-status Report
  • [Presentation] Branching formula for q-Toda function of type B2021

    • Author(s)
      Junichi Shiraishi
    • Organizer
      Workshop on Elliptic Integrable Systems
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Some conjectures concerning non-stationary Ruijsenaars functions2020

    • Author(s)
      Junichi Shiraishi
    • Organizer
      New Connections in Integrable Systems September 29 - October 2, 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Affine screening operators, affine Laumon spaces, and conjectures concerning non-stationary Ruijsenaars functions2019

    • Author(s)
      Junichi Shiraishi
    • Organizer
      Elliptic integrable systems, special functions and quantum field theory
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited

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

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