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Research on geometry related to Weyl groups and root systems

Research Project

Project/Area Number 20540066
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geometry
Research InstitutionTokyo University of Agriculture and Technology

Principal Investigator

SEKIGUCHI Jiro  Tokyo University of Agriculture and Technology, 大学院・工学研究院, 教授 (30117717)

Co-Investigator(Renkei-kenkyūsha) FUKUI Tetsuo  武庫川女子大学, 生活環境学部, 教授 (70218890)
NORO Masayuki  神戸大学, 大学院・理学研究科, 教授 (50332755)
Project Period (FY) 2008 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywordsワイル群 / ルート系 / 斎藤自由因子 / 対数的ベクトル場 / 一意化方程式 / 一意化微分方程式 / 鏡映群 / 特異点 / b-関数 / 捩じれのない積分可能接続
Research Abstract

The zero set of the discriminant of an irreducible real reflection group is known to be a Saito free divisor. In this research project, we construct and classify Saito free divisors in a 3-dimensional affine space. Moreover we clarify the relationship between such divisors and families of deformations of simple curve singularities. As a next stage, we succeeded to construct systems of uniformization equations with singularities along such divisors and classified them. We also obtained some results of the structures of them. We could generalize these results to the case of complex reflection groups of rank three.

Report

(4 results)
  • 2010 Annual Research Report   Final Research Report ( PDF )
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (68 results)

All 2011 2010 2009 2008

All Journal Article (21 results) (of which Peer Reviewed: 17 results) Presentation (47 results)

  • [Journal Article] Systems of uniformization equations along Saito free divisors and related topics2010

    • Author(s)
      関口次郎
    • Journal Title

      Proceedings of Centre for Mathematics and its Applications, Australian National University vol.43

      Pages: 83-127

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Systems of uniformization equations related with dihedral groups2010

    • Author(s)
      関口次郎
    • Journal Title

      Kumamoto J.Math. vol.23

      Pages: 7-26

    • NAID

      110009930098

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Reflection subgroups of the monodromy groups of Appell's F42010

    • Author(s)
      M.Kato, J.Sekiguchi
    • Journal Title

      Kyushu J.Math. vol.64

      Pages: 281-296

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Stratification associated with local b-functions2010

    • Author(s)
      K.Nishiyama, M.Noro
    • Journal Title

      Journal of Symbolic Computation vol.45, No.4

      Pages: 462-480

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] New algorithms for computing primary decomposition of polynomial ideals2010

    • Author(s)
      M.Noro
    • Journal Title

      in Proc.ICMS 2010 LNCS 6327

      Pages: 233-244

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Systems of uniformization equations related with dihedral groups2010

    • Author(s)
      Jiro Sekiguchi
    • Journal Title

      Kumamoto Journal of Mathematics

      Volume: 23 Pages: 7-26

    • NAID

      110009930098

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reflection subgroups of the monodromy groups of Appell's F42010

    • Author(s)
      Mitsuo Kato, Jiro Sekiguchi
    • Journal Title

      Kyushu Journal of Mathematics

      Volume: 64 Pages: 281-296

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Systems of uniformization equations along Saito free divisors and related topics2010

    • Author(s)
      Jiro Sekiguchi
    • Journal Title

      Proceedings of the centre for Mathematics and its applications, Australian National University

      Volume: 43 Pages: 83-126

    • Related Report
      2010 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A classification of weighted homogeneous Saito free divisors2009

    • Author(s)
      関口次郎
    • Journal Title

      J.Math.Soc.Japan vol.61

      Pages: 1071-1095

    • NAID

      10026998607

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Determination of b-functions of polynomials defining Saito free divisors related with simple curve singularities of types E6, E7, E82009

    • Author(s)
      H.Nakayama, J.Sekiguchi
    • Journal Title

      Kumamoto J.Math. vol.22

      Pages: 1-15

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Reflection groups of rank three and systems of uniformization equations, Belgorod State Univ. Scientific Bulletin2009

    • Author(s)
      関口次郎
    • Journal Title

      Mathematics Physics vol.13

      Pages: 77-88

    • Related Report
      2010 Final Research Report
  • [Journal Article] Modular algorithms for computing a generating set of the syzygy Module, Proceedings of CASC20092009

    • Author(s)
      M.Noro
    • Journal Title

      LNCS 5743 Springer

      Pages: 259-268

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] 鏡映群と一意化方程式2009

    • Author(s)
      関口次郎
    • Journal Title

      表現論シンポジウム, 講演集

      Pages: 44-55

    • NAID

      130008004903

    • Related Report
      2010 Final Research Report
  • [Journal Article] Saito free divisors and integrable connections2009

    • Author(s)
      関口次郎
    • Journal Title

      数理解析研究所講究録 vol.1662

      Pages: 102-135

    • Related Report
      2010 Final Research Report
  • [Journal Article] Determination of b-functions of polynomials defining Saito free divisors related with simple curve singularities of types E6, E7, E82009

    • Author(s)
      H.Nakayama, J.Sekiguchi
    • Journal Title

      Kumamoto Journal of Mathematics 22

      Pages: 1-15

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A classification of weighted homogeneous Saito free divisors2009

    • Author(s)
      J.Sekiguchi
    • Journal Title

      Journal of Mathematical Society of Japan 61

      Pages: 1071-1095

    • NAID

      10026998607

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Reflection groups of rank three and systems of uniformization equations2009

    • Author(s)
      J.Sekiguchi
    • Journal Title

      Belgorod State University Scientific bulletin, Mathematics and Physics 13

      Pages: 77-87

    • Related Report
      2009 Annual Research Report
  • [Journal Article] Studies on systems of six lines on a projective plane over a prime field J.Siberian Federal University.2008

    • Author(s)
      関口次郎
    • Journal Title

      Mathematics and Physics vol.2

      Pages: 41-50

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Three dimensional Saito free divisors and singular curves, J. Siberian Federal University.2008

    • Author(s)
      関口次郎
    • Journal Title

      Mathematics and Physics vol.1

      Pages: 33-41

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Three dimensional Saito free divisors and deformations of singular curves2008

    • Author(s)
      関口次郎
    • Journal Title

      J. Siberian Federal Univ., Mathematics and Physics 1

      Pages: 33-41

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Studies on systems of six lines on a projective planeover a prime field2008

    • Author(s)
      関口次郎
    • Journal Title

      J. Siberian Federal Univ., Mathematics and Physics 2

      Pages: 41-50

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] A Schwarz map o Appell's F2 whose monodromy group is related to the reflection group of type D42011

    • Author(s)
      Jiro Sekiguchi
    • Organizer
      Mathematics Seminar at Galatasaray University
    • Place of Presentation
      Galatasaray University (Istanbul, Turkey)
    • Year and Date
      2011-03-21
    • Related Report
      2010 Annual Research Report
  • [Presentation] Discriminants of polynomials and discriminants of real and complex reflection groups2011

    • Author(s)
      Jiro Sekiguchi
    • Organizer
      The 10^<th> Workshop on Nilpotent Orbits and Representation Theory
    • Place of Presentation
      九州大学大学院数理学
    • Year and Date
      2011-02-22
    • Related Report
      2010 Annual Research Report
  • [Presentation] Saito free divisors and holonomic systems2011

    • Author(s)
      Jiro Sekiguchi
    • Organizer
      The 6^<th> Kagoshima Algebra-Analysis-Geometry Seminar
    • Place of Presentation
      鹿児島大学理学部 招待講演
    • Year and Date
      2011-02-17
    • Related Report
      2010 Annual Research Report
  • [Presentation] 斎藤自由因子に沿って特異点をもつ微分方程式について2011

    • Author(s)
      関口次郎
    • Organizer
      超幾何方程式研究会2011
    • Place of Presentation
      神戸大学理学部 招待講演
    • Year and Date
      2011-01-06
    • Related Report
      2010 Annual Research Report
  • [Presentation] A Schwarz map of Appell's F2 whose monodromy group is related to the reflection group of type D42011

    • Author(s)
      関口次郎
    • Organizer
      Mathematics Seminar at Galatasaray University
    • Place of Presentation
      Istanbul, Turkey
    • Related Report
      2010 Final Research Report
  • [Presentation] Discriminants of polynomials and discriminants of real and complex reflection groups2011

    • Author(s)
      関口次郎
    • Organizer
      The 10th Workshop on Nilpotent Orbits and Representation Theory
    • Place of Presentation
      九州大学
    • Related Report
      2010 Final Research Report
  • [Presentation] Saito free divisors and holonomic systems2011

    • Author(s)
      関口次郎
    • Organizer
      The 6th Kagoshima Algebra-Analysis-Geometry Seminar
    • Place of Presentation
      鹿児島大学
    • Related Report
      2010 Final Research Report
  • [Presentation] Saito free divisors in a four dimensional affine space2011

    • Author(s)
      関口次郎
    • Organizer
      Workshop on Geometry and Analysis of Discriminants
    • Place of Presentation
      IPMU(東京大学)
    • Related Report
      2010 Annual Research Report 2010 Final Research Report
  • [Presentation] 斎藤自由因子に沿って特異点を持つ微分方程式について2011

    • Author(s)
      関口次郎
    • Organizer
      超幾何方程式研究会2011
    • Place of Presentation
      神戸大学理学部
    • Related Report
      2010 Final Research Report
  • [Presentation] 階数3の複素鏡映群の判別式集合に沿って特異点を持つ一意化方程式について(加藤満生氏との共同研究)2010

    • Author(s)
      関口次郎
    • Organizer
      古典解析ミニ集会
    • Place of Presentation
      東京大学大学院数理科学
    • Year and Date
      2010-12-03
    • Related Report
      2010 Annual Research Report
  • [Presentation] Saito free divisors, uniformization equations and related topics2010

    • Author(s)
      Jiro Sekiguchi
    • Organizer
      Commutative Algebra and Applications to Combinatorics and Algebraic Geometry
    • Place of Presentation
      Galatasaray University (Instanbul, Turkey) 招待講演
    • Year and Date
      2010-09-24
    • Related Report
      2010 Annual Research Report
  • [Presentation] Saito free divisors, systems of uniformization equations and related topics2010

    • Author(s)
      Jiro Sekiguchi
    • Organizer
      18^<th> Finite and Infinite Dimensional Complex Analysis
    • Place of Presentation
      University of Macau (Macau, China)
    • Year and Date
      2010-08-17
    • Related Report
      2010 Annual Research Report
  • [Presentation] 正2面体群に関係する超楕円曲線の一意化方程式について2010

    • Author(s)
      関口次郎
    • Organizer
      ミニワークセヨップ「微分作用素と剛性」
    • Place of Presentation
      九州大学大学院数理学
    • Year and Date
      2010-07-25
    • Related Report
      2010 Annual Research Report
  • [Presentation] 一意化方程弐の解について2010

    • Author(s)
      関口次郎
    • Organizer
      古典解析セミナー
    • Place of Presentation
      東京大学大学院数理科学
    • Year and Date
      2010-05-28
    • Related Report
      2010 Annual Research Report
  • [Presentation] 斎藤自由因子と一意化方程式系2010

    • Author(s)
      関口次郎
    • Organizer
      研究集会「関数方程式における線形と非線形の融合」
    • Place of Presentation
      電気通信大学(東京都)
    • Year and Date
      2010-03-23
    • Related Report
      2009 Annual Research Report
  • [Presentation] Holonomic systems and fundamental groups-The case of Saito free divisors in C^32010

    • Author(s)
      関口次郎
    • Organizer
      Workshop'Geometry of lattices and infinite dimensional Lie algebras'
    • Place of Presentation
      IPMU(東京大学)(千葉県)
    • Year and Date
      2010-03-18
    • Related Report
      2009 Annual Research Report
  • [Presentation] 微分方程式と基本群の関係2010

    • Author(s)
      関口次郎
    • Organizer
      Accessory Parameter研究会
    • Place of Presentation
      熊本大学(熊本県)
    • Year and Date
      2010-03-17
    • Related Report
      2009 Annual Research Report
  • [Presentation] 3次元空間の単純型斎藤自由因子に沿って特異点を持つ微分方程式系について2010

    • Author(s)
      関口次郎
    • Organizer
      熊本大学大域解析セミナー
    • Place of Presentation
      熊本大学(熊本県)
    • Year and Date
      2010-02-09
    • Related Report
      2009 Annual Research Report
  • [Presentation] 単純型斎藤自由因子の補空間の基本群と一意化方程式2010

    • Author(s)
      関口次郎
    • Organizer
      筑波大学解析セミナー
    • Place of Presentation
      筑波大学(茨城県)
    • Year and Date
      2010-01-20
    • Related Report
      2009 Annual Research Report
  • [Presentation] 階数3の複素鏡映群の判別式集合に沿って特異点を持つ一意化方程式について(加藤満生氏との共同研究2010

    • Author(s)
      関口次郎
    • Organizer
      古典解析ミニ集会
    • Place of Presentation
      東京大学大学院数理科学研究科
    • Related Report
      2010 Final Research Report
  • [Presentation] Saito free divisors, uniformization equations and related topics, CIMPA-TUBITAKI Summer School2010

    • Author(s)
      関口次郎
    • Organizer
      Commutative Algebra and Applications to Combinatorics and Algebraic Geometry
    • Place of Presentation
      Galatasaray University (Istanbul, Turkey)
    • Related Report
      2010 Final Research Report
  • [Presentation] Saito free divisors, systems of uniformization equations and related topics2010

    • Author(s)
      関口次郎
    • Organizer
      18th International Conference on Finite and Infinite Dimensional Complex Analysis
    • Place of Presentation
      University of Macau (Macau, China)
    • Related Report
      2010 Final Research Report
  • [Presentation] 正2面体に関係する超楕円曲線の一意化方程式について2010

    • Author(s)
      関口次郎
    • Organizer
      ミニワークショップ「微分作用素と剛性」
    • Place of Presentation
      九州大学大学院数理学
    • Related Report
      2010 Final Research Report
  • [Presentation] 一意化方程式の解について2010

    • Author(s)
      関口次郎
    • Organizer
      古典解析セミナー
    • Place of Presentation
      東京大学大学院数理科学研究科
    • Related Report
      2010 Final Research Report
  • [Presentation] 斎藤自由因子と一意化方程式系2010

    • Author(s)
      関口次郎
    • Organizer
      研究集会「関数方程式における線形と非線形の融合」
    • Place of Presentation
      電気通信大学
    • Related Report
      2010 Final Research Report
  • [Presentation] Holonomic systems and fundamental groups-The case of Saito free divisors in C32010

    • Author(s)
      関口次郎
    • Organizer
      Workshop Geometry of lattices and infinite dimensional Lie algebras
    • Place of Presentation
      IPMU(東京大学)
    • Related Report
      2010 Final Research Report
  • [Presentation] 微分方程式と基本群の関係2010

    • Author(s)
      関口次郎
    • Organizer
      Accessory Parameter研究会
    • Place of Presentation
      熊本大学
    • Related Report
      2010 Final Research Report
  • [Presentation] 3次元空間の単純型斎藤自由因子に沿って特異点を持つ微分方程式について2010

    • Author(s)
      関口次郎
    • Organizer
      熊本大学大域解析セミナー
    • Place of Presentation
      熊本大学
    • Related Report
      2010 Final Research Report
  • [Presentation] 対数的自由因子の補空間の基本群と一意化方程式2010

    • Author(s)
      関口次郎
    • Organizer
      筑波大学解析セミナー
    • Related Report
      2010 Final Research Report
  • [Presentation] 対数的自由因子に沿った積分可能接続について2009

    • Author(s)
      関口次郎
    • Organizer
      近畿大学解析セミナー
    • Place of Presentation
      近畿大学(大阪府)
    • Year and Date
      2009-12-15
    • Related Report
      2009 Annual Research Report
  • [Presentation] Systems of uniformization equations and hyperelliptic integrals2009

    • Author(s)
      関口次郎
    • Organizer
      Seminar at IPMU
    • Place of Presentation
      IMPU(東京大学)(千葉県)
    • Year and Date
      2009-12-01
    • Related Report
      2009 Annual Research Report
  • [Presentation] Systems of uniformization equations and hyperelliptic integrals2009

    • Author(s)
      関口次郎
    • Organizer
      Workshop"Complex Analysis and its applications"Moscow Session of Sino-Russia Symposium
    • Place of Presentation
      Institute for Control Sciences RAS(Moscow, Russia)
    • Year and Date
      2009-10-22
    • Related Report
      2009 Annual Research Report
  • [Presentation] Uniformization equations with respect to Saito free divisors and related topics2009

    • Author(s)
      関口次郎
    • Organizer
      JARCS 2009 Australian-Japanese real and complex singularities workshop
    • Place of Presentation
      Univesity of Sydney(Sydney, Australia)
    • Year and Date
      2009-09-16
    • Related Report
      2009 Annual Research Report
  • [Presentation] 実射影平面の8直線の配置と$E_8$型ルート系2009

    • Author(s)
      関口次郎
    • Organizer
      成木勇夫先生退職記念研究会「表現的幾何」
    • Place of Presentation
      名古屋大学大学院多元数理研究科
    • Year and Date
      2009-03-15
    • Related Report
      2008 Annual Research Report
  • [Presentation] Saito free divisors and integrable connections2009

    • Author(s)
      関口次郎
    • Organizer
      微分方程式のモノドロミーをめぐる諸問題(短期共同研究)
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2009-02-05
    • Related Report
      2008 Annual Research Report
  • [Presentation] Unitary reflection groups and uniformization differential equations2009

    • Author(s)
      関口次郎
    • Organizer
      「微分方程式と対称空間」大島利雄先生還暦記念研究集会
    • Place of Presentation
      東京大学大学院数理科学研究科
    • Year and Date
      2009-01-14
    • Related Report
      2008 Annual Research Report
  • [Presentation] 単純型斎藤自由因子に沿った積分可能接続について2009

    • Author(s)
      関口次郎
    • Organizer
      近畿大学数学講演会
    • Place of Presentation
      近畿大学
    • Related Report
      2010 Final Research Report
  • [Presentation] Systems of uniformization equations and hyperelliptic integrals2009

    • Author(s)
      関口次郎
    • Organizer
      Seminar at IPMU
    • Place of Presentation
      IPMU(東京大学)
    • Related Report
      2010 Final Research Report
  • [Presentation] 鏡映群と一意化方程式2009

    • Author(s)
      関口次郎
    • Organizer
      表現論シンポジウム2009
    • Place of Presentation
      沖縄県宜野湾市健康文化村
    • Related Report
      2010 Final Research Report 2009 Annual Research Report
  • [Presentation] Systems of uniformization equations and hyperelliptic integrals, Workshop2009

    • Author(s)
      関口次郎
    • Organizer
      Complex Analysis and its Applications", Moscow Session of Sino-Russia Symposium, Institute for Control Sciences RAS
    • Place of Presentation
      Moscow, Russia
    • Related Report
      2010 Final Research Report
  • [Presentation] Uniformization equations with respect to Saito free divisors and related topics2009

    • Author(s)
      関口次郎
    • Organizer
      JARCS 2009 Australian-Japanese real and complex singularities workshop, University of Sydney
    • Place of Presentation
      Sydney, Australia
    • Related Report
      2010 Final Research Report
  • [Presentation] 実射影平面の8直線の配置とE_8型ルート系2009

    • Author(s)
      関口次郎
    • Organizer
      成木勇夫先生退職記念研究会「表現的幾何」
    • Place of Presentation
      名古屋大学大学院多元数理
    • Related Report
      2010 Final Research Report
  • [Presentation] 部分ロンスキアンに関する問題提起2009

    • Author(s)
      関口次郎
    • Organizer
      研究集会「Workshop on Accessory Parameter at Kumamoto」
    • Place of Presentation
      熊本大学
    • Related Report
      2010 Final Research Report
  • [Presentation] Saito free divisors and integrable connections2009

    • Author(s)
      関口次郎
    • Organizer
      研究集会「微分方程式のモノドロミーをめぐる諸問題」
    • Place of Presentation
      数理解析研究所(京都大学)
    • Related Report
      2010 Final Research Report
  • [Presentation] Unitary reflection groups and uniformization differential equations2009

    • Author(s)
      関口次郎
    • Organizer
      微分方程式と対称空間(大島利雄先生還暦記念研究集会)
    • Place of Presentation
      東京大学大学院数理科学
    • Related Report
      2010 Final Research Report
  • [Presentation] Unitary reflection groups of rank three and Saito free divisors2008

    • Author(s)
      関口次郎
    • Organizer
      Workshop-2008 "Geometry and Analysis on Complex Algebraic Varieties"
    • Place of Presentation
      モスクワ独立大学(モスクワ)
    • Year and Date
      2008-09-26
    • Related Report
      2008 Annual Research Report
  • [Presentation] Unitary reflection groups of rank three and Saito free divisors, Workshop-2008, Geometry and Analysis on Complex Algebraic Varieties2008

    • Author(s)
      関口次郎
    • Organizer
      Independent University of Moscow
    • Place of Presentation
      Moscow, Russia
    • Related Report
      2010 Final Research Report

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Published: 2008-04-01   Modified: 2016-04-21  

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