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Zero distribution of Dirichlet L-functions

Research Project

Project/Area Number 21K03204
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11010:Algebra-related
Research InstitutionKanto Gakuin University (2022-2023)
Kobe University (2021)

Principal Investigator

SONO Keiju  関東学院大学, 理工学部, 准教授 (10735989)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2023: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2022: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
KeywordsディリクレL関数 / 保型L関数 / 素数分布 / 積分モーメント / 解析的整数論 / 零点分布 / 詰め込み問題 / 一般リーマン予想
Outline of Research at the Start

当研究では, Fengの軟化子やディリクレL関数の積分平均などに関する諸結果を用いることにより, ディリクレL関数のあるクラスの自明でない零点全体のうち, どの程度の割合が関数等式の中心線Re(s)=1/2上にあるのかを研究する.

Outline of Final Research Achievements

I studied analytic properties of Dirichlet L-functions and automorphic L-functions, which are associated to arithmetic objects. In particular, I studied zero distribution of primitive Dirichlet L-functions, the relation between moment of L-functions and zero density of L-functions, and the second moment of GL(4)-automorphic L-function on the critical line. I wrote totally 4 papers on these theme and published three of them.

Academic Significance and Societal Importance of the Research Achievements

ディリクレL関数や保型L関数などの各種L関数は等差数列中の素数分布の研究など、数論における基礎的な問題に幅広く応用されており、それらの研究は楕円曲線暗号、RSA暗号の開発など、われわれの現実生活に直接関わる様々なツールに実用化されている。当研究も、整数論の基礎的な問題への応用の可能性は十分にあり、それらが長期的に見え現実の諸問題を解決ないし改善する上での鍵となることが大いに期待される。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (5 results)

All 2023 2022 2021

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (2 results) (of which Invited: 2 results)

  • [Journal Article] The second moment of Dirichlet twists of a GL4 automorphic L-function2023

    • Author(s)
      Keiju SONO
    • Journal Title

      Mathematische Zeitschrift

      Volume: 305 Issue: 3 Pages: 1-30

    • DOI

      10.1007/s00209-023-03363-x

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Perfectly packing a square by squares of sidelength f(n)^{-t}2023

    • Author(s)
      Keiju Sono
    • Journal Title

      Discrete Mathematics

      Volume: 346 Issue: 4 Pages: 113293-113293

    • DOI

      10.1016/j.disc.2022.113293

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] Moments and zero density estimates for Dirichlet L-functions2021

    • Author(s)
      Keiju SONO
    • Journal Title

      TURKISH JOURNAL OF MATHEMATICS

      Volume: 45 Issue: 5 Pages: 2050-2072

    • DOI

      10.3906/mat-2104-29

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] いくつかの隣接する素数の差が連続して大きくなる場合の明示的評価2023

    • Author(s)
      宗野惠樹
    • Organizer
      解析数論セミナーII
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] The second moment of Dirichlet twists of a GL(4)-automorphic L-function2022

    • Author(s)
      宗野惠樹
    • Organizer
      第15回ゼータ若手研究集会
    • Related Report
      2021 Research-status Report
    • Invited

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Published: 2021-04-28   Modified: 2025-01-30  

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