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2012 Fiscal Year Final Research Report

Geometric study of special functions

Research Project

  • PDF
Project/Area Number 22540038
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Algebra
Research InstitutionHokkaido University

Principal Investigator

MATSUMOTO Keiji  北海道大学, 大学院・理学研究院, 教授 (30229546)

Co-Investigator(Renkei-kenkyūsha) TERASOMA Tomohide  東京大学, 大学院・数理科学研究科, 教授 (50192654)
SHIGA Hironori  千葉大学, 大学院・理学研究科, 名誉教授 (90009605)
YOSHIDA Masaaki  九州大学, 大学院・数理学研究院, 教授 (30030787)
OHARA Katsuyoshi  金沢大学, 数物科学系, 准教授 (00313635)
Project Period (FY) 2010 – 2012
Keywords超幾何関数 / テータ関数 / 算術幾何平均 / 局所系係数(コ)ホモロジー群
Research Abstract

We construct several formulas for hypergeometric functions and systems of differential equations of multi-variables. (1) By using the intersection forms defined between twisted (co)homology groups, we give monodromy representations and connection matrices of Pfaffians for some of them. (2) For hypergeometric functions with special parameters related to periods of algebraic varieties, we give some identities between automorphic forms and hypergeometric functions. (3) Some limits defined by the iteration of several means of several terms are expressed by hypergeometric functions of multi-variables.

  • Research Products

    (15 results)

All 2012 2011 2010 Other

All Journal Article (9 results) (of which Peer Reviewed: 9 results) Presentation (6 results)

  • [Journal Article] Thomae type formula for K3 surfaces given by double covers of the projective plane branching along six lines2012

    • Author(s)
      Keiji Matsumoto and Tomohide Terasoma
    • Journal Title

      Journal fur die Reine und AngewandteMathematik

      Volume: 669 Pages: 121-149

    • Peer Reviewed
  • [Journal Article] Limits of iterations of complex maps and hypergeometric functions2012

    • Author(s)
      Keiji Matsumoto and Takashi Oikawa
    • Journal Title

      Hokkaido Mathematical Journal

      Volume: 41 Pages: 135-155

    • Peer Reviewed
  • [Journal Article] Monodromy of the hypergeometric differential equation of type (3,6) III2010

    • Author(s)
      Keiji Matsumoto Takeshi Sasaki and Masaaki Yoshia
    • Journal Title

      Kumamoto Journal of Mathematics

      Volume: 23 Pages: 37-47

    • Peer Reviewed
  • [Journal Article] Arithmetic-geometric means for hyperelliptic curves and Calabi-Yau varieties2010

    • Author(s)
      Keiji Matsumoto and Tomohide Terasoma
    • Journal Title

      International Journal of Mathematics

      Volume: 21 Pages: 939-949

    • Peer Reviewed
  • [Journal Article] A transformation formula for Appell's hypergeometric function F_1 and common limits of triple sequences by mean iterations2010

    • Author(s)
      Keiji Matsumoto
    • Journal Title

      The Tohoku Mathematical Journal. SecondSeries

      Volume: 62 Pages: 263-268

    • Peer Reviewed
  • [Journal Article] Jacobi's formula for Hesse cubic curves2010

    • Author(s)
      Keiji Matsumoto and Shinya Yamazaki and Tomohide Terasoma
    • Journal Title

      Acta Mathematica Vietnamica

      Volume: 35 Pages: 91-105

    • Peer Reviewed
  • [Journal Article] A variant of Jacobi type formula for Picard curves2010

    • Author(s)
      Keiji Matsumoto and Hironori Shiga
    • Journal Title

      Journal of the Mathematical Society ofJapan

      Volume: 62 Pages: 305-319

    • Peer Reviewed
  • [Journal Article] Monodromy and Pfaffian of Lauricella's F_D in terms of the intersection forms of twisted (co)homology groups

    • Author(s)
      Keiji Matsumoto
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: (掲載決定)

    • Peer Reviewed
  • [Journal Article] Monodromy of Lauricella's hypergeometric F_A-system

    • Author(s)
      Keiji Matsumoto and Masaaki Yoshida
    • Journal Title

      Annali della Scuola Normale Superiore di Pisa. Classe di Scienze. Serie V

      Volume: (掲載決定)

    • Peer Reviewed
  • [Presentation] 交点形式からのAppell'sF_4の考察2012

    • Author(s)
      松本圭司
    • Organizer
      琉球超幾何セミナー
    • Place of Presentation
      琉球大学理学部
    • Year and Date
      2012-11-21
  • [Presentation] Advances in the theory of Appell-Lauricella's Hypergeometric functions after their works2012

    • Author(s)
      松本圭司
    • Organizer
      第6回玉原特殊多様体研究集会
    • Place of Presentation
      東京大学玉原国際セミナーハウス.
    • Year and Date
      2012-09-03
  • [Presentation] Thomae type formulas for cyclic triple branched coverings of the complex projective line2012

    • Author(s)
      Keiji Matsumoto
    • Organizer
      Workshop on hypergeometric functions and related topics
    • Place of Presentation
      東京大学玉原国際セミナーハウス.
    • Year and Date
      2012-06-30
  • [Presentation] モノドロミー群とパッフ形式の交点形式による表現2012

    • Author(s)
      松本圭司
    • Organizer
      超幾何方程式研究会2012
    • Place of Presentation
      神戸大学理学部.
    • Year and Date
      2012-01-06
  • [Presentation] 超幾何関数F_Dのモノドロミー群とパッフ形式2011

    • Author(s)
      松本圭司
    • Organizer
      第5回玉原特殊多様体研究集会
    • Place of Presentation
      東京大学玉原国際セミナーハウス.
    • Year and Date
      2011-09-05
  • [Presentation] Lauricella'sF_Aのモノドロミー群2011

    • Author(s)
      松本圭司
    • Organizer
      超幾何方程式研究会2011
    • Place of Presentation
      神戸大学理学部
    • Year and Date
      2011-01-05

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Published: 2014-08-29  

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