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Recent development of special functions from the viewpoint of the representation theory and the integrals in complex variables

Research Project

Project/Area Number 23340002
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Algebra
Research InstitutionOsaka University (2014-2015)
Tokyo Institute of Technology (2011-2013)

Principal Investigator

MIMACHI KATSUHISA  大阪大学, 情報科学研究科, 教授 (40211594)

Co-Investigator(Renkei-kenkyūsha) YOSHIDA MASAAKI  九州大学, 名誉教授 (30030787)
KUROKAWA NOBUSHIGE  東京工業大学, 大学院理工学研究科, 教授 (70114866)
TAKATA TOSHIE  九州大学, 大学院数理学研究院, 准教授 (40253398)
Project Period (FY) 2011-04-01 – 2016-03-31
Project Status Completed (Fiscal Year 2015)
Budget Amount *help
¥11,440,000 (Direct Cost: ¥8,800,000、Indirect Cost: ¥2,640,000)
Fiscal Year 2015: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2012: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywords超幾何函数 / 超幾何積分 / 複素積分 / モノドロミー / 既約性 / ねじれホモロジー / フックス型微分方程式 / 接続問題 / 一般超幾何函数 / ロンスキアン / 回路行列 / ルート系に付随する超幾何函数 / モノドロミー表現 / Selberg型積分 / Mehta積分 / Appell / 表現論 / Selberg積分 / Mehta積分 / 直交多項式
Outline of Final Research Achievements

We calculated explicitly the circuit matrices associated with Gauss' {}_2F1, the generalized hypergeometric functions {}_{n+1}F_n, Apell's F_1, F_2, F_3, Jordan-Pochhammer F_{JP}, and Lauricella's F_D, and, by using them, we determine the conditions that the corresponding (system of) diffferential equations being irreducible. On the other hand, in the cases of F_2, F_3, F_4, we study the contiguity relations and give the conditions that the corresponding systems being reducible.

We prove that, in each case of the classical hypergeometric equations and Gelfand's hypergeometric system on the space of point configurations, the integral of a multivalued functions over any cycle satisfies the system of differential equations. Here the classical hypergeometric equations mean the equations satisfied by Appell's F_1, F_2, F_3, F_4, Lauricella's F_D, F_A, F_B, F_C, and the generalized hypergeometric function {}_{n+1}F_n.

Report

(6 results)
  • 2015 Annual Research Report   Final Research Report ( PDF )
  • 2014 Annual Research Report
  • 2013 Annual Research Report
  • 2012 Annual Research Report
  • 2011 Annual Research Report
  • Research Products

    (22 results)

All 2016 2015 2014 2013 2012 2011 Other

All Journal Article (11 results) (of which Peer Reviewed: 11 results,  Acknowledgement Compliant: 1 results) Presentation (10 results) (of which Invited: 9 results) Remarks (1 results)

  • [Journal Article] MONODROMY REPRESENTATIONS ASSOCIATED WITH THE GENERALIZED HYPERGEOMETRIC FUNCTION <b><i><sub>n</sub></i></b><b><sub>+</sub></b><sub>1</sub><b><i>F</i></b><b><i><sub>n </sub></i></b>AND THEIR REDUCIBILITY2016

    • Author(s)
      K. .Mimachi
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 70 Issue: 1 Pages: 105-129

    • DOI

      10.2206/kyushujm.70.105

    • NAID

      130005152471

    • ISSN
      1340-6116, 1883-2032
    • Related Report
      2015 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Reducibility of the systems of differential equations satisfied by Appell's F_2, F_3 and F_42015

    • Author(s)
      Katsuhisa Mimachi and Takeshi Sasaki
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 印刷中

    • Related Report
      2014 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The connection problem associated with a Selberg type integral and the q-Racah polynomials2013

    • Author(s)
      K.Mimachi
    • Journal Title

      Forum Math.

      Volume: 25 Issue: 6 Pages: 1127-1179

    • DOI

      10.1515/form.2011.139

    • Related Report
      2013 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Monodromy representations associated with the Gauss hypergeometric function using integrals of a multivalued function2012

    • Author(s)
      K.Mimachi and T.Sasaki
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 66

    • NAID

      130002543071

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Irreducibility and reducibility of Lauricella's system of differential equations E_D and the Jordan-Pochhammer differential equation E_{JP}2012

    • Author(s)
      K.Mimachi and T.Sasaki
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 66

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Monodromy representations associated with Appell's hypergeometric function F_1 using integrals of a multivalued function2012

    • Author(s)
      K.Mimachi and T.Sasaki
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 66

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Solutions for some families of Fuchsian differential equations free from accessory parameters in terms of the integral2012

    • Author(s)
      K.Mimachi
    • Journal Title

      Advanced Studies in Pure Mathematics

      Volume: 62

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tensor product multiplicities for crystal bases of extremal weight modules over quantum infinite rank affine algebras of type B_\infty, C_\infty, and D_\infty2012

    • Author(s)
      S.Naito and D.Sagaki
    • Journal Title

      Trans. Amer. Math. Soc.

      Volume: 364

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The Jones polynomial and the intersection numbers of twisted cyclesassociated with a Selberg type integral2011

    • Author(s)
      K.Mimachi
    • Journal Title

      Jour.Knot Theory and its Ramifications

      Volume: 20 Issue: 03 Pages: 469-496

    • DOI

      10.1142/s0218216511008887

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Intesection numbers for twisted cycles and the connection problem associated with the generalized hypergeometric function {}_{n+1}F_n2011

    • Author(s)
      K.Mimachi
    • Journal Title

      International Mathematics Eesearch Notices

      Volume: 2011 Pages: 1757-1781

    • DOI

      10.1093/imrn/rnq131

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A connection problem for Simposon's even family of rank four2011

    • Author(s)
      Y.Haraoka, K.Mimachi
    • Journal Title

      Funkt.Ekvac.

      Volume: 54 Pages: 495-515

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Presentation] 一般超幾何方程式${}_{n+1}E_n$に付随するモノドロミー表現2016

    • Author(s)
      三町勝久
    • Organizer
      超幾何方程式研究会2016
    • Place of Presentation
      神戸大学瀧川記念学術交流会館(神戸市灘区六甲台町)
    • Year and Date
      2016-01-05
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] Monodromy representations associated with the generalized hypergeometric functions {}_{n+1}F_n2015

    • Author(s)
      三町勝久
    • Organizer
      アクセサリー・パラメーター研究会
    • Place of Presentation
      熊本大学理学部
    • Year and Date
      2015-03-13 – 2015-03-15
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Monodromy representations associated with the generalized hypergeometric functions {}_{n+1}F_n2015

    • Author(s)
      三町勝久
    • Organizer
      Representation Theory, Special Functions and Painleve Equations
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2015-03-03 – 2015-03-06
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Gelfand の超幾何微分方程式E(k,n)の可約性と隣接作用素2015

    • Author(s)
      三町勝久
    • Organizer
      超幾何方程式研究会2015
    • Place of Presentation
      神戸大学瀧川記念学術交流会館
    • Year and Date
      2015-01-05 – 2015-01-07
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Mehta-Macdonaldの積分公式の導出(N=2,3,4,5)2014

    • Author(s)
      三町勝久
    • Organizer
      超幾何方程式研究会2014
    • Place of Presentation
      神戸大学瀧川記念学術交流会館(兵庫県)
    • Related Report
      2013 Annual Research Report
    • Invited
  • [Presentation] AppellのF_4超幾何函数に付随するモノドロミー表現2013

    • Author(s)
      三町勝久
    • Organizer
      超幾何方程式研究会2013
    • Place of Presentation
      神戸大学(兵庫県)
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Quantum alcove model, quantum LS paths, parabolic quantum Bruhat graphs, and Macdonald polymomials2013

    • Author(s)
      内藤聡
    • Organizer
      Whittaker Functions, Schubert Calculus, and Crystals
    • Place of Presentation
      ICERM (Institute for Computational and Experimental Research in Mathematics), Brown University, USA
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] AppellのF_4超幾何函数に付随するモノドロミー表現 II2013

    • Author(s)
      三町勝久
    • Organizer
      研究集会「アクセサリー・パラメーター研究会」
    • Place of Presentation
      熊本大学(熊本県)
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] ガウスの超幾何微分方程式の解の積分表示2012

    • Author(s)
      三町勝久
    • Organizer
      超幾何方程式研究会2012
    • Place of Presentation
      神戸大学理学部(招待講演)
    • Year and Date
      2012-01-17
    • Related Report
      2011 Annual Research Report
  • [Presentation] 一般超幾何函数_{n+1}F_nに付随するモノドロミー表現2012

    • Author(s)
      三町勝久
    • Organizer
      研究集会「超幾何関数とその周辺」
    • Place of Presentation
      東京大学玉原国際セミナーハウス(群馬県)
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Remarks]

    • URL

      http://www.math.titech.ac.jp/~mimachi/mimachi.html

    • Related Report
      2011 Annual Research Report

URL: 

Published: 2013-05-15   Modified: 2019-07-29  

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