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Study on hypergeometric functions

Research Project

Project/Area Number 19340034
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Basic analysis
Research InstitutionKyushu University

Principal Investigator

YOSHIDA Masaaki  Kyushu University, 大学院・数理学研究院, 教授 (30030787)

Co-Investigator(Kenkyū-buntansha) 佐々木 武  神戸大学, 理学部, 教授 (00022682)
三町 勝久  東京工業大学, 理工学研究科, 教授 (40211594)
松本 圭司  北海道大学, 理学研究科, 准教授 (30229546)
Project Period (FY) 2007 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2009: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2008: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2007: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords黒写像 / 又黒写像 / 平前曲面 / 超幾何関数 / 絵有関数 / 離散曲面 / 平面配置 / 平行曲面族 / 焦曲面 / 離散平前曲面 / 超平面配置 / 舌寝配置 / 超幾何 / 交叉数 / 捻表路地群 / 平前 / 燕尾 / 特異点 / 絵有 / 離散 / 測多価群 / 共鳴 / 裏黒写像 / 白頭絡
Research Abstract

We succeeded to find a good discretization of the hyperbolic Schwarz map for the Airy equation. This is the starting point of the study of singularities of discrete surfaces. For the hypergeometric differential equation of type (3,6), we found a relation between the two monodromy groups - arithmetic group acting of the domain of type IV, and the maximal non-real finite complex reflection group.
We described chambers cut out by six planes in general position in the 3-space.
Veronese arrangements of hyperplanes in real projective spaces re studied.
A set of generators of the monodromy group of the Appell-Lauricella's hypergeometric equation of type FA is obtained.

Report

(6 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report   Self-evaluation Report ( PDF )
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (31 results)

All 2010 2009 2008 2007

All Journal Article (28 results) (of which Peer Reviewed: 28 results) Presentation (3 results)

  • [Journal Article] Monodromy of the hypergeometric differential equation of type $(3,6)$ III.2010

    • Author(s)
      M.Yoshida, K.Matsumoto, T.Sasaki
    • Journal Title

      Kumamoto J.Math. 23

      Pages: 37-47

    • NAID

      110009930100

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Hyperbolic Schwarz map around irregular singular points, Funkcial.2010

    • Author(s)
      M.Yoshida, T.Koike, T.Sasaki
    • Journal Title

      Ekvac. 53

      Pages: 99-132

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Hyperbolic Schwarz map around irregular singular points2010

    • Author(s)
      T.Koike, T.Sasaki, M.Yoshida
    • Journal Title

      Funkcial.Ekvac.

      Volume: 58 Pages: 99-132

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Monodromy of the hypergeometric differential equation of type (3, 6) III2010

    • Author(s)
      K.Matsumoto, T.Sasaki, M.Yoshida
    • Journal Title

      Kumamoto J.Math.

      Volume: 23 Pages: 37-47

    • NAID

      110009930100

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Singularities of parallel families of flat fronts and their caustics, and a detailed study of an example arising from the hyperbolic schwarz map of a hypergeometric equation.2009

    • Author(s)
      M.Yoshida, T.Sasaki
    • Journal Title

      Results in Math. 56

      Pages: 369-385

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Surface singularities appeared in the hyperbolic Schwarz map for the hypergeometric equation.2009

    • Author(s)
      M.Yoshida, T.Sasaki
    • Journal Title

      Prog in Math 283

      Pages: 247-272

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Hyperbolic Schwarz map for the confluent hypergeometric functions.2009

    • Author(s)
      M.Yoshida, K.Saji, T.Sasaki
    • Journal Title

      J Math Soc Japan 61

      Pages: 559-578

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Hyperbolic Schwarz map for the confluent hypergeometric functions2009

    • Author(s)
      Sasaki, Saji, Yoshida
    • Journal Title

      J Math Soc Japan 61

      Pages: 559-578

    • Related Report
      2009 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] Surface singularities appeared in the hyperbolic Schwarz map for the hypergeometric equation2009

    • Author(s)
      Sasaki, Yoshida
    • Journal Title

      Prog in Mth. 283

      Pages: 247-272

    • Related Report
      2009 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] Singularities of parallel families of flat fronts and their caustics, and a detailed study of an example arising from the hyperbolic schwarz map of a hypergeometric equation2009

    • Author(s)
      Sasaki, Yoshida
    • Journal Title

      Result in Math 56

      Pages: 369-385

    • Related Report
      2009 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] Hyperbolic Schwarz map for the confluent hypergeometric functions2009

    • Author(s)
      Yoshida, Saji, Sasaki
    • Journal Title

      J Math Soc Japan 61

      Pages: 559-578

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Surface singularities appeared in the hyperbolic Schwarz map for the hypergeometric equation2009

    • Author(s)
      Yoshida, Sasaki
    • Journal Title

      Prog in Math 283

      Pages: 247-272

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Singularities of parallel families of flat fronts and their caustics, and a detailed study of an example arising from the hyperbolic schwarz map of a hypergeometric equation2009

    • Author(s)
      Yoshida, Sasaki
    • Journal Title

      Results in Math 56

      Pages: 369-385

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Hyperbolic Schwarz map for the Airy function.2008

    • Author(s)
      M.Yoshida, T.Sasaki
    • Journal Title

      J Math.Sci. Univ Tokyo 15

      Pages: 195-218

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Confluence of swallowtail singularities of the Hyperbolic Schwarz map defined by the hypergeometric differential equation.2008

    • Author(s)
      M.Yoshida, M.Noro, T.Sasaki, K.Yamada
    • Journal Title

      Experiment. Math. 17

      Pages: 191-204

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Derived Schwarz map of the hypergeometric equation and a parallel family of flat fronts.2008

    • Author(s)
      M.Yoshida, T.Sasaki, K.Yamada
    • Journal Title

      Internat J of Math 19

      Pages: 847-863

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Hyperbolic Schwarz map for the hypergeometric function.2008

    • Author(s)
      M.Yoshida, T.Sasaki, K.Yamada
    • Journal Title

      Experiment. Math. 17

      Pages: 269-282

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Affine Schwarz map for the hypergeometric differential equation.2008

    • Author(s)
      M.Yoshida, T.Nishizaka, R.Kobayashi, S.Shinzato
    • Journal Title

      Funkcial. Ekvac. 51

      Pages: 281-305

    • NAID

      130000140710

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Interpolation of Markoff transformations on the Fricke surfaces.2008

    • Author(s)
      M.Yoshida, T.Sasaki
    • Journal Title

      Tohoku J Math. 60

      Pages: 23-36

    • NAID

      110006602739

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Homogeneous two-manifolds with an invariant two-form2008

    • Author(s)
      M.Yoshida T.Sasaki
    • Journal Title

      J Diff Geom 88

      Pages: 149-161

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Automorphic functions for a Kleinian group.2008

    • Author(s)
      M.Yoshida
    • Journal Title

      Geometry \& Topology Monographs 13

      Pages: 483-497

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Automorphic functions for a Kleinian group2008

    • Author(s)
      M. Yoshida
    • Journal Title

      Geometry Topology Monographs 13

      Pages: 483-497

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Homogeneous 2-manifolds with an invariant 2-form2008

    • Author(s)
      M. Yoshida, et al
    • Journal Title

      L Diff Geom 88

      Pages: 149-161

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Interpolation of Markoff transformations on the Fricke surfaces2008

    • Author(s)
      M. Yoshida, et al
    • Journal Title

      Tohoku J Math 60

      Pages: 23-36

    • NAID

      110006602739

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Regularizable cycles associated with a Selberg-type integral under some resonance condition.2007

    • Author(s)
      M.Yoshida, K.Mimachi
    • Journal Title

      Internat J Math 18

      Pages: 1-15

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] From the power function to the hypergeometric function.2007

    • Author(s)
      M.Yoshida
    • Journal Title

      Prog in Math 260

      Pages: 407-429

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Regularizable cycles associated with a Selberg-type integral under some resonance relation2007

    • Author(s)
      K. Mimachi, M. Yoshida
    • Journal Title

      Internat J Math 18

      Pages: 1-15

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] From the power function to the hypergeometric function2007

    • Author(s)
      M. Yoshida
    • Journal Title

      Prog in Math 18

      Pages: 407-429

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] 離散的超幾何的又黒写像2009

    • Organizer
      可積分系云々集会
    • Place of Presentation
      函館未来大学
    • Year and Date
      2009-08-11
    • Related Report
      2009 Annual Research Report 2009 Self-evaluation Report
  • [Presentation] 超幾何的又黒写像2008

    • Author(s)
      吉田 正章
    • Organizer
      岡本和夫先生還暦記念研究集会
    • Place of Presentation
      東大数理
    • Related Report
      2008 Annual Research Report
  • [Presentation] 白頭的又黒写像2007

    • Author(s)
      吉田 正章
    • Organizer
      双曲幾何
    • Place of Presentation
      京都大学数理解析研究所
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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