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J-GLOBAL ID：200901040298920409   Update date: Feb. 15, 2026

Umegaki Yumiko

ウメガキ ユミコ | Umegaki Yumiko
Affiliation and department：
Nara Women's University

About Nara Women's University


Job title： Professor
Research field  (1)： Algebra
Research theme for competitive and other funds  (6)：
  • 2022 - 2027 Value-distribution theory of zeta and multiple zeta functions
  • 2011 - 2019 The order of zeros of automorphic L -functions and the value of L-functions
  • 2013 - 2018 A study on algebraic and analytic behavior of multiple zeta-functions and multiple automorphic L-functions
  • 2007 - 2010 Class number and values of L-functions with cusp forms
  • 2004 - 2006 解析数論の保型L関数への応用
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Papers (21)：
  • Manami Hosoi, Yumiko Umegaki. On the distribution of $\log|L(\sigma,\chi)|}$ and $\log L(\sigma, \chi_D)}$in the modulus aspect. Functiones et Approximatio Commentarii Mathematici. 2025. -1. -1
  • Kohji Matsumoto, Yumiko Umegaki. On the value-distribution of symmetric power L-functions. “Topics in Number Theory”, Proceedings of a Conference organized by the Institute of Mathematical Sciences, Chennai and IIT Ropar during 22-25th December, 2017, On the Occasion of the 130th Birth Anniversary of Srinivasa Ramanujan, edited by Tapas Chatterjee and Sanoli Gun, Lecture Notes Series Number 26. 2020. 147-167
  • Yasuko Morita, Atsuki Umegaki, Yumiko Umegaki. Bicubic number fields with large class numbers. Advanced Studies in Pure Mathematics. 2020. 84. 335-351
  • Atsuki Umegaki, Yumiko Umegaki. Quartic fields with large class numbers. Rocky Mountain Journal of Mathematics. 2020. 50. 1. 267-280
  • Kohji Matsumoto, Yumiko Umegaki. On the density function for the value-distribution of automorphic L-functions. Journal of Number Theory. 2019. 198. 176-199
ｍore...
Lectures and oral presentations  (51)：
  • On M-functions related to the values of logarithms of Dirichlet L-functions in the modulus aspect
    (Analytic Behavior of Zeta Functions 2025)
  • s=\sigma における Dirichlet L 関数の対数値の値分布について
    (不老町解析数論セミナー 2024)
  • primitive form に付随する Symmetric square L 関数の対数値に関する M 関数
    (解析数論セミナー 2022)
  • 類数の大きな 4 次拡大体について
    (愛知数論セミナー 2019)
  • On the value-distribution of the difference between logarithms of two symmetric power L-functions.
    (Various Aspects of Multiple Zeta Function 2017)
ｍore...
Education (1)：
  • - 2002 Nagoya University
Professional career (1)：
  • 博士(数理学) (名古屋大学)
Work history (6)：
  • 2022/04 - 現在 Nara Women's University Faculty of Science Department of Mathematical and Physical Sciences Professor
  • 2010 - 2022/03 -:奈良女子大学理学部数学科・准教授
  • 2010 - 2010 :広島大学大学院工学研究科情報工学専攻・准教授
  • 2007 - 2010 :広島大学大学院工学研究科情報工学専攻・助教
  • 2003 - 2007 :広島大学大学院工学研究科情報工学専攻・助手
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Committee career (4)：
  • 2025/06 - 2027/05 日本数学会 理事
  • 2026/04 - 2027/03 日本数学会 『数学通信』非常任編集委員
  • 2025/04 - 2026/03 日本数学会 『数学通信』常任編集委員
  • 2024/03 - 2026/02 日本数学会 全国区代議員(評議員)
Association Membership(s) (1)：
日本数学会
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