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Randomness of sequences and its applications to transcendental number theory

Research Project

Project/Area Number 15K17505
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Algebra
Research InstitutionUniversity of Tsukuba

Principal Investigator

Kaneko Hajime  筑波大学, 数理物質系, 助教 (10706724)

Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywords数系におけるdigit / Pisot数 / Salem数 / ベータ展開 / 代数的独立性 / Smooth number / Newton法 / Cauchy数 / 一様分布論 / 結晶 / 線形回帰数列 / 数系 / 正規数 / 等比数列の小数部分 / 解析数論 / Pisot数, Salem数 / 代数的独立 / 超越数 / ディオファントス近似
Outline of Final Research Achievements

We investigated the complexity of sequences of real numbers and integers. First, we considered the normality of the digits in the beta expansion of algebraic numbers. In the case where beta is a Pisot or Salem number, we succeeded in improving known results of complexity of the digits of algebraic numbers. In particular, we gave new lower bounds for the number of nonzero digits. Moreover, applying our method, we gave new criteria for the algebraic independence of real numbers.
Moreover, we researched the complexity of the digits in the base-b expansions of integers. With Y. Bugeaud, we solved certain open problem on the complexity of the digits in the base-b expansion of smooth numbers.

Academic Significance and Societal Importance of the Research Achievements

数列の複雑度を保証することは、疑似乱数などの応用数学の観点からも重要である。ベータ展開におけるdigitに関して、本研究では加法数論を用いた新たな手法を導入することができた。特に、代数的数のベータ展開に関して、digitの複雑度を保証することができた。代数的数のdigitという情報を研究することで、超越数論、特にベキ級数の超越性特殊値の代数的独立性に関する理論が発展した。
また、smooth numberのb進展開のdigitの複雑度を保証できた。本研究の手法により、幅広い整数について、b進展開のdigitを解析できるようになった。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (38 results)

All 2019 2018 2017 2016 2015 Other

All Int'l Joint Research (6 results) Journal Article (11 results) (of which Int'l Joint Research: 8 results,  Peer Reviewed: 10 results,  Acknowledgement Compliant: 3 results) Presentation (21 results) (of which Int'l Joint Research: 9 results,  Invited: 9 results)

  • [Int'l Joint Research] Dongguk University(韓国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Strasbourg大学/Lorraine大学(フランス)

    • Related Report
      2017 Research-status Report
  • [Int'l Joint Research] Wuhan大学(中国)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Lorraine大学(フランス)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Strasbourg大学(フランス)

    • Related Report
      2016 Research-status Report
  • [Int'l Joint Research] Wuhan University(中国)

    • Related Report
      2015 Research-status Report
  • [Journal Article] Corona limits of tilings: Periodic case2019

    • Author(s)
      S Akiyama, J Caalim, K Imai, H Kaneko
    • Journal Title

      Discrete & Computational Geometry

      Volume: 61(3) Issue: 3 Pages: 626-652

    • DOI

      10.1007/s00454-018-0033-x

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On Perfect Powers in Linear Recurrence Sequences of Integers2019

    • Author(s)
      Yann Bugeaud, Hajime Kaneko
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 印刷中

    • NAID

      130007871358

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Hensel’s lemma for general continuous functions2019

    • Author(s)
      Hajime Kaneko, Thomas Stoll
    • Journal Title

      Indagationes Mathematicae

      Volume: 印刷中 Issue: 4 Pages: 610-622

    • DOI

      10.1016/j.indag.2019.02.004

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On the digits in the base-b expansion of smooth numbers2018

    • Author(s)
      Yann Bugeaud, Hajime Kaneko
    • Journal Title

      RIMS Kokyuroku

      Volume: 2092 Pages: 97-103

    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] Arithmetical properties of real numbers related to beta-expansions2018

    • Author(s)
      Hajime Kaneko
    • Journal Title

      Functiones et Approximatio Commentarii Mathematici

      Volume: 印刷中

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] On the digital representation of smooth numbers2018

    • Author(s)
      Yann Bugeaud and Hajime Kaneko
    • Journal Title

      Mathematical Proceedings of the Cambridge Philosophical Society

      Volume: 印刷中

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] On subwords in the base-q expansion of polynomial and exponential functions2018

    • Author(s)
      Hajime Kaneko and Thomas Stoll
    • Journal Title

      Integers

      Volume: 18A

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Algebraic independence of the values of power series with unbounded coefficients2017

    • Author(s)
      Hajime Kaneko
    • Journal Title

      Arkiv for Matematik

      Volume: 55 Pages: 61-87

    • Related Report
      2017 Research-status Report 2016 Research-status Report
    • Peer Reviewed
  • [Journal Article] Bernoulli-Carlitz and Cauchy-Carlitz numbers with Stirling-Carlitz numbers2017

    • Author(s)
      Hajime Kaneko, Takao Komatsu
    • Journal Title

      「代数的整数論とその周辺2015」別冊(RIMS Kokyuroku Bessatsu)

      Volume: 印刷中

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] On the number of nonzero digits in the beta-expansions of algebraic numbers2016

    • Author(s)
      Hajime Kaneko
    • Journal Title

      Rendiconti del Seminario Matematico della Universita di Padova

      Volume: 印刷中

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Cauchy-Carlitz numbers2016

    • Author(s)
      Hajime Kaneko, Takao Komatsu
    • Journal Title

      Journal of Number Theory

      Volume: 印刷中

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Presentation] Comparison of generic points of measure preserving systems2019

    • Author(s)
      Hajime Kaneko
    • Organizer
      数論とエルゴード理論(金沢大学サテライトプラザ)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Uniform distribution theory related to beta expansion and geometric sequences2019

    • Author(s)
      Hajime Kaneko
    • Organizer
      第12回ゼータ若手研究集会(名古屋大学)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Analogy of the Lagrange spectrum for powers of quadratic Pisot units2019

    • Author(s)
      Hajime Kaneko
    • Organizer
      Diophantine Analysis and Related Fields 2019(筑波大学)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Analogy with the Lagrange spectrum for geometric sequences2019

    • Author(s)
      Hajime Kaneko
    • Organizer
      Keio Dynamics Day 2019(慶應義塾大学)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Comparison of normality between different numerical systems2019

    • Author(s)
      Hajime Kaneko
    • Organizer
      日本数学会2019年度年会(東京工業大学)
    • Related Report
      2018 Annual Research Report
  • [Presentation] b進展開に関するBorelの予想および超越数論への応用2018

    • Author(s)
      Hajime Kaneko
    • Organizer
      慶應 超越数論セミナー(慶應義塾大学)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 非負整数係数ベキ級数の代数的整数点における超越性2018

    • Author(s)
      Hajime Kaneko
    • Organizer
      慶應 超越数論セミナー(慶應義塾大学)
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Diophantine approximation and base-b expansion of smooth numbers2018

    • Author(s)
      Hajime Kaneko
    • Organizer
      Diophantine Approximation and Transcendence(CIRM, Marseille)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ベキ級数に代数的整数を代入した値の超越性2018

    • Author(s)
      Hajime Kaneko
    • Organizer
      日本数学会2018年度秋季総合分科会(岡山大学)
    • Related Report
      2018 Annual Research Report
  • [Presentation] On the transcendence of power series at algebraic integer points2018

    • Author(s)
      Hajime Kaneko
    • Organizer
      解析的整数論とその周辺(京都大学数理解析研究所)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 代数的数のdigit展開に関する最近の展望2018

    • Author(s)
      金子 元
    • Organizer
      Workshop「数論とエルゴード理論」
    • Related Report
      2017 Research-status Report
  • [Presentation] On the digital expansion of algebraic numbers2018

    • Author(s)
      Hajime Kaneko
    • Organizer
      Diophantine Analysis and Related Fields 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 代数的数のベータ展開におけるdigit変化数について2018

    • Author(s)
      金子 元
    • Organizer
      日本数学会2018年度年会
    • Related Report
      2017 Research-status Report
  • [Presentation] On the number of nonzero digits of smooth numbers2017

    • Author(s)
      Hajime Kaneko
    • Organizer
      Journees Arithmetiques
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] 整数及び小数のdigit展開における一様分布論の最近の展開2017

    • Author(s)
      金子 元
    • Organizer
      日本数学会2017年度秋季総合分科会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] On the digits in the base-b expansion of smooth numbers2017

    • Author(s)
      Hajime Kaneko
    • Organizer
      Analytic Number Theory and Related Areas
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Algebraic independence of the values of power series with unbounded coefficients2016

    • Author(s)
      Hajime Kaneko
    • Organizer
      Journee d'Approximation Diophantienne
    • Place of Presentation
      Lorraine大学, France, Vandoeuvre-Les-Nancy
    • Year and Date
      2016-12-01
    • Related Report
      2016 Research-status Report
    • Invited
  • [Presentation] Algebraic independence of real numbers related to beta expansion and beta representation2016

    • Author(s)
      Hajime Kaneko
    • Organizer
      Normal Numbers: Arithmetic, Computational and Probabilistic Aspects
    • Place of Presentation
      Vienna大学, Austria, Vienna
    • Year and Date
      2016-11-18
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Algebraic independence of real numbers related to beta expansion2016

    • Author(s)
      Kaneko Hajime
    • Organizer
      Workshop「数論とエルゴード理論」
    • Place of Presentation
      金沢大学(石川県金沢市)
    • Year and Date
      2016-02-07
    • Related Report
      2015 Research-status Report
  • [Presentation] Arithmetical properties of the values of power series2015

    • Author(s)
      Kaneko Hajime
    • Organizer
      Analytic Number Theory and Related Areas
    • Place of Presentation
      京都大学(京都府京都市)
    • Year and Date
      2015-11-04
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] Arithmetical properties of power series related to β-expansion2015

    • Author(s)
      Kaneko Hajime
    • Organizer
      Journees Arithmetiques 2015
    • Place of Presentation
      Debrecen大学(ハンガリー)
    • Year and Date
      2015-07-07
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2022-02-22  

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