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Research on arithmetical properties of the special values of the theta-constants and the applications

Research Project

Project/Area Number 18K03201
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

Tachiya Yohei  弘前大学, 理工学研究科, 准教授 (90439539)

Project Period (FY) 2018-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords代数的独立性 / テータ零値 / 保型形式 / 超越数 / 線形独立性 / 無限積 / フィボナッチ数 / ランベルト級数 / 空隙級数 / 保型関数 / 不定方程式 / 超越性 / 約数関数 / ルカ数 / closed from / 無理性 / 二項回帰数列 / 整数論 / テータ関数 / 従属関係式
Outline of Final Research Achievements

The aim of this research is to study the arithmetical properties of the special values of modular forms. In this research, applying Nesterenko's theorem, we gave algebraic independence criterion for the values at the same point of two modular function under certain conditions. As an application, we showed algebraic independence of infinite series and products involving Fibonacci numbers. Moreover, we obtained linear independence results for certain gap series by developing the methods of S.Chowla and P.Erdos.

Academic Significance and Societal Importance of the Research Achievements

保型形式論からの新たなアプローチを見出し, 幅広い保型関数の特殊値に適用できるような代数的独立性の判定条件を構築したこと, 並びにその応用として新たなクラスの超越数の実例を与えたことは重要である. 本判定条件は, 2つの関数値の代数的独立性と関数の比の非定数性が同値であることを主張するものであり, 応用面においても有用である. 今後の研究の継続・発展が期待できる.

Report

(6 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (28 results)

All 2023 2022 2021 2020 2019 Other

All Int'l Joint Research (10 results) Journal Article (9 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 8 results,  Open Access: 4 results) Presentation (9 results) (of which Int'l Joint Research: 2 results,  Invited: 4 results)

  • [Int'l Joint Research] Lycee Cesar Baggio(フランス)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Fachhochschule fur die Wirtschaft(ドイツ)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] Lycee Cesar Baggio(フランス)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Fachhochschule fur die Wirtschaft(ドイツ)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] Lycee Cesar Baggio(フランス)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] Fachhochschule fur die Wirtschaft(ドイツ)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Lycee Cesar Baggio(フランス)

    • Related Report
      2019 Research-status Report
  • [Int'l Joint Research] Fachhochschule fur die Wirtschaft(ドイツ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] University of the Witwatersrand(南アフリカ)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] Lycee Cesar Baggio(フランス)

    • Related Report
      2018 Research-status Report
  • [Journal Article] 代数的独立性の判定条件とその応用2023

    • Author(s)
      立谷洋平
    • Journal Title

      第67回 代数学シンポジウム報告集

      Volume: - Pages: 19-34

    • Related Report
      2022 Annual Research Report
  • [Journal Article] A criterion of algebraic independence of values of modular functions and an application to infinite products involving Fibonacci and Lucas numbers2022

    • Author(s)
      Daniel Duverney, Carsten Elsner, Masanobu Kaneko, and Yohei Tachiya
    • Journal Title

      Reseach in Number Theory

      Volume: 8, no. 2 Paper No. 31 Issue: 2

    • DOI

      10.1007/s40993-022-00328-7

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Linear independence of certain sums of reciprocals of the Lucas numbers2022

    • Author(s)
      D.Duverney and Y.Tachiya
    • Journal Title

      Periodica Mathematica Hungarica

      Volume: - Issue: 2 Pages: 378-394

    • DOI

      10.1007/s10998-022-00478-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Algebraic independence of certain infinite products involving the Fibonacci numbers2021

    • Author(s)
      D.Duverney and Y. Tachiya
    • Journal Title

      Proceedings of the Japan Academy, Series A, Mathematical Sciences

      Volume: 97 Issue: 5 Pages: 29-31

    • DOI

      10.3792/pjaa.97.006

    • NAID

      40022572112

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Linear independence results for sums of reciprocals of Fibonacci and Lucas numbers2020

    • Author(s)
      D.Duverney, Y. Suzuki, and Y. Tachiya
    • Journal Title

      Acta Mathematica Hungarica

      Volume: 162 Issue: 1 Pages: 375-392

    • DOI

      10.1007/s10474-020-01060-3

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Linear independence of infinite products generated by the Lucas numbers2020

    • Author(s)
      D.Duverney and Y. Tachiya
    • Journal Title

      The Fibonacci Quarterly

      Volume: 58 Pages: 115-127

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Algebraic independence results for the values of the theta-constants and some identities2020

    • Author(s)
      C. Elsner, M. Kaneko, and Y. Tachiya
    • Journal Title

      Journal of the Ramanujan Mathematical Society

      Volume: 35 Pages: 71-80

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Refinement of the Chowla-Erdos method and linear independence of certain Lambert series2019

    • Author(s)
      D. Duverney and Y. Tachiya
    • Journal Title

      Forum Mathematicum

      Volume: 31 Issue: 6 Pages: 1557-1566

    • DOI

      10.1515/forum-2018-0299

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Algebraic results for the values \theta_3(m\tau) and \theta_3(n\tau) of the Jacobi theta-constant.2019

    • Author(s)
      C. Elsner, F. Luca, and Y. Tachiya
    • Journal Title

      Moscow Journal of Combinatorics and Number Theory

      Volume: 8 Issue: 1 Pages: 71-79

    • DOI

      10.2140/moscow.2019.8.71

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 代数的独立性の判定条件とその応用2022

    • Author(s)
      立谷洋平
    • Organizer
      第67回代数学シンポジウム
    • Related Report
      2022 Annual Research Report
  • [Presentation] 単項式指数をもつ空隙級数の線形独立性について2022

    • Author(s)
      立谷洋平, 村上慎太郎
    • Organizer
      日本数学会秋季総合分科会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Kumarの定理の一般化とその証明法について2022

    • Author(s)
      立谷洋平
    • Organizer
      2022大分熊本整数論研究集会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Algebraic independence results for the infinite products involving Fibonacci and Lucas numbers2022

    • Author(s)
      Yohei Tachiya
    • Organizer
      Online conference <Days of Transcendence> in occasion of Professor Yuri Nesterenko's 75th birthday
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Algebraic independence criterion for the values of modular forms and the applications2021

    • Author(s)
      立谷洋平
    • Organizer
      筑波セミナー(オンライン形式)
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] モジュラー関数値に対する代数的独立性の判定基準とその応用2021

    • Author(s)
      立谷洋平
    • Organizer
      東北大学理学部数学科談話会
    • Related Report
      2021 Research-status Report
    • Invited
  • [Presentation] Arithmetical properties of certain infinite series and products involving the Lucas numbers2021

    • Author(s)
      立谷洋平
    • Organizer
      第14回ゼータ若手研究集会(オンラインによる開催)
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Linear independence of reciprocal sums of certain Fibonacci-type numbers2019

    • Author(s)
      Yohei Tachiya
    • Organizer
      24th Central European Number Theory Conference
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Refinement of Chowla-Erdos method and arithmetical properties of certain Lambert series2019

    • Author(s)
      Yohei Tachiya
    • Organizer
      Diophantine Analysis and Related Fields 2019
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2024-01-30  

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