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Unified and mutually evolving study of various multiple zeta values

Research Project

Project/Area Number 20K14294
Research Category

Grant-in-Aid for Early-Career Scientists

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

Principal Investigator

Tasaka Koji  愛知県立大学, 情報科学部, 准教授 (30780762)

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 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords多重ゼータ値 / 有限多重ゼータ値 / q類似 / モジュラー形式 / 多重Eisenstein級数 / 金子-Zagier予想 / Broadhurst-Kreimer予想 / 多重モジュラー値 / Kaneko-Zagier予想 / 有限代数的数 / レベルNの多重ゼータ値 / q-supercongruence / 混合Tateモチーフの周期
Outline of Research at the Start

近年,多様な背景のもとに導入された異なるタイプの多重ゼータ値の間の関係性に関する研究が活発に行われている。本研究では,多重ゼータ値とモジュラー形式 (の周期) との関係を示唆する Broadhurst-Kreimer 予想,多重ゼータ値の mod p 有限類似と多重ゼータ値の関係を記述する金子-Zagier 予想,およびレベル N の多重ゼータ値および多重モジュラー値を用いた混合 Tate モチーフの周期の解明といった3つの課題に取り組み,主に代数的なアプローチによる各々の課題の相互発展および統一理論の構築を目指す。

Outline of Final Research Achievements

In the study of number theory, special values of zeta functions are an important subject of research involving various fields of mathematics and theoretical physics. In this study, we have obtained several results concerning the study of multiple zeta values, which are multivariable version of the Riemann zeta function, and their relationship with finite multiple zeta values and modular forms. In particular, in the development of a unified theory applicable to multiple zeta-valued variants and other variants introduced in various backgrounds, we have constructed a basic theory of multiple Eisenstein series and found applications to the generalized Kaneko-Zagier conjecture with supercongruences of q-analogue of multiple zeta values.

Academic Significance and Societal Importance of the Research Achievements

今回の成果から,金子-Zagier予想は混合Tateモチーフの周期である数のクラスについても期待できる現象であることがわかり,金子-Zagier予想の真髄に一歩近づくことができた。また,四半世紀未解決であるBroadhurst-Kreimer予想を部分的に解析できたことも今後につながる材料となりうる。こういった予想の解析から次の時代の数学がどんどん芽生えているという意味では,本研究の学術的意義は高い。

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

    (22 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (7 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 6 results,  Open Access: 6 results) Presentation (11 results) (of which Int'l Joint Research: 5 results,  Invited: 4 results) Remarks (3 results)

  • [Int'l Joint Research] Oxford University(英国)

    • Related Report
      2022 Research-status Report
  • [Journal Article] SUPERCONGRUENCES OF MULTIPLE HARMONIC <i>q</i>-SUMS AND GENERALIZED FINITE/SYMMETRIC MULTIPLE ZETA VALUES2023

    • Author(s)
      Y. Takeyama, K. Tasaka
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 77 Issue: 1 Pages: 75-120

    • DOI

      10.2206/kyushujm.77.75

    • ISSN
      1340-6116, 1883-2032
    • Related Report
      2023 Annual Research Report 2022 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Catalogue of modular relations for double zeta values2023

    • Author(s)
      Tasaka Koji
    • Journal Title

      RIMS講究録

      Volume: 2267 Pages: 100-121

    • Related Report
      2023 Annual Research Report
    • Open Access
  • [Journal Article] On a unified double zeta function of Mordell--Tornheim type*2022

    • Author(s)
      Kadota Shin-ya、Okamoto Takuya、Ono Masataka、Tasaka Koji
    • Journal Title

      Lithuanian Mathematical Journal

      Volume: - Issue: 2 Pages: 207-217

    • DOI

      10.1007/s10986-022-09556-x

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Finite and symmetric colored multiple zeta values and multiple harmonic q-series at roots of unity2021

    • Author(s)
      Tasaka Koji
    • Journal Title

      Selecta Mathematica

      Volume: 27 Issue: 2

    • DOI

      10.1007/s00029-021-00636-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Finite and symmetric Mordell–Tornheim multiple zeta values2021

    • Author(s)
      BACHMANN Henrik, TAKEYAMA Yoshihiro, TASAKA Koji
    • Journal Title

      Journal of the Mathematical Society of Japan

      Volume: 73 Issue: 4 Pages: 1129-1158

    • DOI

      10.2969/jmsj/84348434

    • NAID

      130008106917

    • ISSN
      0025-5645, 1881-1167, 1881-2333
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Relationships between multiple zeta values of depths 2 and 3 and period polynomials2021

    • Author(s)
      Ding Ma, Koji Tasaka
    • Journal Title

      Israel Journal of Mathathematics

      Volume: 印刷中

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Note on totally odd multiple zeta values2021

    • Author(s)
      Koji Tasaka
    • Journal Title

      Mathematical Journal of Okayama University

      Volume: 印刷中

    • NAID

      120007172125

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Spherical designs and modular forms of the D4 root lattice2023

    • Author(s)
      Koji Tasaka
    • Organizer
      RIMS conference ``Analytic and arithmetic aspects of automorphic representations", Kyoto University
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] Spherical designs and modular forms of the D4-lattice2023

    • Author(s)
      Koji Tasaka
    • Organizer
      Number Theory Lunch Seminar, Max Planck Institute for Mathematics
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] From topics on explicit relations between multiple zeta values and modular forms2023

    • Author(s)
      Koji Tasaka
    • Organizer
      RIMS conference ``Zeta functions and their representations", Kyoto University
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Around double shuffle relations2023

    • Author(s)
      田坂浩二
    • Organizer
      第5回青葉山ゼータ研究集会, 東北大学
    • Related Report
      2022 Research-status Report
    • Invited
  • [Presentation] 多重ゼータの計算入門2022

    • Author(s)
      田坂浩二
    • Organizer
      Computing Multiple Zeta Seminar, Zoom
    • Related Report
      2022 Research-status Report
    • Int'l Joint Research
  • [Presentation] 「有限」代数的数からなる環の零因子について2022

    • Author(s)
      田坂浩二
    • Organizer
      愛知数論セミナー, 名古屋工業大学
    • Related Report
      2022 Research-status Report
  • [Presentation] 金子-Zagier予想の広がり2021

    • Author(s)
      田坂浩二
    • Organizer
      2021大分整数論研究集会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] 有限代数的数について2021

    • Author(s)
      田坂浩二
    • Organizer
      九大多重ゼータセミナー
    • Related Report
      2021 Research-status Report
  • [Presentation] いくつかの多重ゼータ値の有限q類似の話題から2020

    • Author(s)
      田坂浩二
    • Organizer
      第49回関西多重ゼータ研究会
    • Related Report
      2020 Research-status Report
  • [Presentation] Supercongruences of q-analogues of multiple harmonic sums2020

    • Author(s)
      田坂浩二
    • Organizer
      Japan Europe Number Theory Exchange Seminar
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Lehmer予想と球デザインに関する観察2020

    • Author(s)
      田坂浩二
    • Organizer
      早稲田整数論セミナー
    • Related Report
      2020 Research-status Report
  • [Remarks] http://www.ist.aichi-pu.ac.jp/~tasaka/

    • Related Report
      2022 Research-status Report
  • [Remarks] 田坂浩二のホームページ

    • URL

      http://www.ist.aichi-pu.ac.jp/~tasaka/

    • Related Report
      2021 Research-status Report
  • [Remarks] http://www.ist.aichi-pu.ac.jp/~tasaka/

    • Related Report
      2020 Research-status Report

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

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