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Unipotent dimension and structures of algebraic varieties

Research Project

Project/Area Number 18540058
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Algebra
Research InstitutionKwansei Gakuin University

Principal Investigator

MIYANISHI Masayoshi  Kwansei Gakuin University, 理工学部, 教授 (80025311)

Co-Investigator(Kenkyū-buntansha) 増田 佳代  兵庫県立大学, 物質理学研究科, 准教授 (40280416)
Co-Investigator(Renkei-kenkyūsha) MASUDA Kayo  兵庫県立大学, 物質理学研究科, 准教授 (40280416)
Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥2,980,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥480,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Keywordsユニポテント代数群 / アフィン代数多様体 / ファイブレーション / Jacobian予想 / 不分岐射 / 多項式環 / 特異点 / 一般化されたJacobian予想 / 商特異点 / アフィン代数曲面 / 加法群スキーム / ユニポテント群 / 代数多様体の構造 / 局所冪零導分 / 完備化 / 有限群 / ジャコビアン予想 / 不分岐自己準同型射 / 引き上げ / アフィン擬平面 / 代数的トーラス / 純部分環 / 開代数曲面
Research Abstract

アフィン代数多様体がもつアフィン空間のファイブレーションの相対次元の最大値としてユニポテント次元の概念を導入し,アフィン代数多様体の構造を2次元および高次元の場合について解明した.その概念を応用して,ジャコピアン予想を一般化したものを一部肯定的に解決した.

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (28 results)

All 2009 2008 2007 2006 Other

All Journal Article (18 results) (of which Peer Reviewed: 15 results) Presentation (8 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Lifting of locally nilpotent derivations under finite homomorphism2009

    • Author(s)
      増田佳代, 宮西正宜
    • Journal Title

      Tohoku Mathematical Journal (掲載決定)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Jacobian problem for singular surfaces2009

    • Author(s)
      R. V. Gurjar, 宮西正宜
    • Journal Title

      Journal of Mathematics 48(印刷中)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Additive group scheme actions on the integral schemes defined over discrete valuation rings2009

    • Author(s)
      宮西正宜
    • Journal Title

      Journal of Algebra, a special issue for Professor PaulRoberts (印刷中)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Homogeneous locally nilpotent derivations having slices and embeddings of the affine spaces2009

    • Author(s)
      増田佳代
    • Journal Title

      Journal of Algebra 321(印刷中)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Smoothness of the images of the members of a linear pencil under an endomorphism of the affine plane2009

    • Author(s)
      Pierrette CassoirNogues, 宮西正宜
    • Journal Title

      Journal of Pure and Applied Algebra 213

      Pages: 711-723

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Ga-actions and completions2008

    • Author(s)
      宮西正宜
    • Journal Title

      Journal of Algebra 319

      Pages: 2845-2854

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Affine lines on affine surfaces and the Makar-Limanov invariant2008

    • Author(s)
      R. V. Gudar, 増田佳代, 宮西正宜, P. Russell
    • Journal Title

      Candian Journal of Mathematics 60

      Pages: 109-139

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Affine lines on affine surfaces and the Makar-Limanov invariant2008

    • Author(s)
      R. V. Gurjar
    • Journal Title

      Canadian Journal of Mathematics 60

      Pages: 109-139

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] G_a-actions and completions2008

    • Author(s)
      Masayoshi Miyanishi
    • Journal Title

      Journal of Algebra 319

      Pages: 2845-2854

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Q-factorial subalgebras of polynomial rings2007

    • Author(s)
      宮西正宜
    • Journal Title

      Acta Mathematica Vietnamica 32

      Pages: 113-122

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Recent developments in affine algebraic geometry, Affine Algebraic Geometry edited by T. Hibi2007

    • Author(s)
      宮西正宜
    • Journal Title

      Osaka University Press

      Pages: 307-378

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Recent developments in affine algebraic geometry2007

    • Author(s)
      Masayoshi Miyanishi
    • Journal Title

      Affine Algebraic Geometry edited by T.Hibi

      Pages: 307-378

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Q-factorial subalgebras of polynomial rings2007

    • Author(s)
      Masayoshi Miyanishi
    • Journal Title

      Acta Mathematica Vietnamica 32

      Pages: 113-122

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] G-endomorphisms of affine G-varieties which induces automorphisms of the invariant surbrings of the coordinate rings2007

    • Author(s)
      Kayo Masuda
    • Journal Title

      Journal of Algebras 307

      Pages: 97-105

    • Related Report
      2006 Annual Research Report
  • [Journal Article] A geometric approach to the Jacobian conjecture in dimension two2006

    • Author(s)
      宮西正宜
    • Journal Title

      Journal of Algebra 304

      Pages: 1014-1025

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Affine pseudo-planes with torus actions2006

    • Author(s)
      増田佳代, 宮西正宜
    • Journal Title

      Transformation Groups 11

      Pages: 249-267

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Affine pseudo-planes with torus actions2006

    • Author(s)
      Masayoshi Miyanishi
    • Journal Title

      Transformation groups 11

      Pages: 249-267

    • Related Report
      2006 Annual Research Report
  • [Journal Article] A geometric approach to the Jacobian conjecture in dimension two2006

    • Author(s)
      Masayoshi Miyanishi
    • Journal Title

      Journal of Algebras 304

      Pages: 1014-1025

    • Related Report
      2006 Annual Research Report
  • [Presentation] Additive group scheme actions on integral domains defined discrete valuation rings2008

    • Author(s)
      宮西正宜
    • Organizer
      Conference on Affine Algebraic Geometry
    • Place of Presentation
      Bangalore, India
    • Year and Date
      2008-12-23
    • Related Report
      2008 Final Research Report
  • [Presentation] Jacobian Problem for singular surfaces2008

    • Author(s)
      宮西正宜
    • Organizer
      Affine geometry, Number theory and Singularities, Pi60
    • Place of Presentation
      CIEM, Castro Urdiales, Spain
    • Year and Date
      2008-06-17
    • Related Report
      2008 Final Research Report
  • [Presentation] Ga-actions andcompletions2007

    • Author(s)
      宮西正宜
    • Organizer
      Affine Algebraic Geometry, Special session of the Western section of American Mathematical Society
    • Place of Presentation
      New Mexico University, Albuquerque, USA
    • Year and Date
      2007-10-13
    • Related Report
      2008 Final Research Report
  • [Presentation] G_a-actions and completions2007

    • Author(s)
      Masayoshi Miyanishi
    • Organizer
      アメリカ数学会西部支部分科会
    • Place of Presentation
      ニューメキシコ州立大学・アメリカ
    • Year and Date
      2007-10-13
    • Related Report
      2007 Annual Research Report
  • [Presentation] Geometry of open algebraic surfaces2007

    • Author(s)
      宮西正宜
    • Organizer
      Workshop on Affine Algebraic Geometry
    • Place of Presentation
      athematisches Forschungsinstitut Oberwolfach, Germany
    • Year and Date
      2007-01-09
    • Related Report
      2008 Final Research Report
  • [Presentation] pure subalgebras of a polynomial ring and related topics2006

    • Author(s)
      宮西正宜
    • Organizer
      International School and Workshop on Polynomial Automorphisms and Related Topics
    • Place of Presentation
      Hanoi, Vietnam
    • Year and Date
      2006-10-19
    • Related Report
      2008 Final Research Report
  • [Presentation] Affine pseudo-planes with torus actions2006

    • Author(s)
      宮西正宜
    • Organizer
      Algebraic Geometry Conference ABB70
    • Place of Presentation
      Bedlewo, Poland. Banach Conference Center
    • Year and Date
      2006-07-13
    • Related Report
      2008 Final Research Report
  • [Presentation] Quelques pensees sur le theoreme d'Ax2006

    • Author(s)
      宮西正宜
    • Organizer
      Seminaire de la Theorie des Nombres
    • Place of Presentation
      Universite de Bordeaux I, France
    • Year and Date
      2006-03-24
    • Related Report
      2008 Final Research Report
  • [Book] 現代数理入門2009

    • Author(s)
      宮西正宜,茨木俊秀, 編
    • Publisher
      関西学院大学出版会
    • Related Report
      2008 Final Research Report
  • [Remarks] 国内のアフィン代数幾何学研究集会を関西学院大学大阪梅田キャンパスの施設を利用して,次の3回主催した.(1)2009年3月16,17,18日(2)2008年9月3,4,5,6日(3)2008年3月10,11,12日

    • Related Report
      2008 Final Research Report

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Published: 2006-04-01   Modified: 2016-04-21  

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