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群作用と代数多様体

Research Project

Project/Area Number 10740007
Research Category

Grant-in-Aid for Encouragement of Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Algebra
Research InstitutionThe University of Tokyo

Principal Investigator

小木曽 啓示  東大, 数理(科)学研究科, 助教授 (40224133)

Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1999: ¥800,000 (Direct Cost: ¥800,000)
Keywordsカラビーヤウ多様体 / K3曲面
Research Abstract

Qx(Kx)【similar or equal】Qxかつh'(Qx)=0である非特異射影複素3次元多様体をカラビーヤウ多様体という。2つの大きな未解決問題である有界性とMovinson予想に関連して次のこと
1.無限この異なるK3ファイブレーションをもつカラビーヤウ多様体に関して次のいずれかが成りたつ
(1)C_2=O fibrationをもつ (2)同型を除きK3 fibrationsは有限個
2.任意のカラビーヤウ多様体に対し、それに付随するC_2=O contractionsは同型を除き有限個。更にC_2が恒等的にOであるカラビーヤウ多様体のネフコーンは有限有理多面錐であり、そのネフQ-因子はすべてstrm-ample、特に付随するcontiactionsは有限個。

Report

(1 results)
  • 1998 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] K.Oguiso,N.Machida: "On K3 surfaces admitting finite non-symplectic group actions" J.Math.Sci.Univ.Tokyo. 5. 273-297 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Oguiso,T.Peteunell: "Calabi-Tau three folds with positive second Chem class" Comm.in Analysis and Geometry. 5. 153-172 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Oguiso,D.Q.Zhang: "On extremal log Eninquir surfaces II" Tohoku Math.J. 50. 419-436 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Oguiso,D.Q.Zhang: "K3 surfaces with order five automosphisms" J.Math.Kyoto Univ.38. 419-438 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Oguiso: "Toward finiteness of fiber space structures on a Calabi-Yau3-fold" Proceedings of Shatavevich Seminar,Russia Acd.Sci.Moscow. 1. 104-122 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Oguiso,D.Q.Zhang: "On the complete classification of extremal log Eninquir surface" Math.2. (to appear).

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Oguiso,D.Q.Zhang: "On Vorontsov's theorem on K3 surfaces with non-symplectic group activins" Proc.AMS. (to appear).

    • Related Report
      1998 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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