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Extensions and applications of the theory of toric varieties

Research Project

Project/Area Number 19340001
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Algebra
Research InstitutionTohoku University

Principal Investigator

ISHIDA Masanori  東北大学, 大学院・理学研究科, 教授 (30124548)

Co-Investigator(Kenkyū-buntansha) OGATA Shoetsu  東北大学, 大学院・理学研究科, 准教授 (90177113)
YUKIE Akihiko  東北大学, 大学院・理学研究科, 教授 (20312548)
HANAMURA Masaki  東北大学, 大学院・理学研究科, 教授 (60189587)
HARA Nobuo  東北大学, 大学院・理学研究科, 准教授 (90298167)
KAJIWARA Takeshi  横浜国立大学, 大学院・工学研究院, 准教授 (00250663)
ASHIKAGA Tadashi  東北学院大学, 工学部, 教授 (90125203)
TSUCHIHASHI Hiroyasu  東北学院大学, 教養学部, 教授 (00146119)
TAKAHASHI Tomokuni  一関工業高等専門学校, 准教授 (50259793)
SATO Hiroshi  岐阜聖徳学園大学, 経済情報学部, 准教授 (20433310)
Project Period (FY) 2007 – 2010
Project Status Completed (Fiscal Year 2010)
Budget Amount *help
¥12,610,000 (Direct Cost: ¥9,700,000、Indirect Cost: ¥2,910,000)
Fiscal Year 2010: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2009: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2008: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2007: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Keywordsトーリック多様体 / 扇 / 凸多面体 / 循環商特異点 / 代数多様体 / モチーフ / 代数群 / トーリック / 特異点 / モティーフ / 代数多様本
Research Abstract

We have studied on the extensions and applications of the theory of toric varieties. We got new results on the extensions of the concepts of fans and semigroup rings and associated toric varieties and their extensions, locally finite scheme associated to a decomposition of a real space by not necessarily bounded polytopes. We also got results on the Minkowskii sums of convex polytopes and very ampleness and normality of line bundles, normal varieties factoring Frobenius morphisms, and resolutions of higherdimensional cyclic quotient singularities.

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

    (19 results)

All 2011 2010 2009 2008 2007 Other

All Journal Article (8 results) (of which Peer Reviewed: 8 results) Presentation (11 results)

  • [Journal Article] Certain relative quadric hypersurfaces in 3-dimensional projective space bundles over a projective curve2011

    • Author(s)
      T. Takahashi
    • Journal Title

      Geom. Dedicata.

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Local signature defect of fibered complex surfaces via monodromy and stable reduction2010

    • Author(s)
      T. Ashikaga
    • Journal Title

      Comment. Math. Helv.

      Volume: 85 Pages: 417-461

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] Local signature defect of fibered complex surfaces via monodromy and stable reduction2010

    • Author(s)
      T. Ashikaga
    • Journal Title

      Comment. Math. Helv. 85

      Pages: 417-461

    • Related Report
      2009 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] On multiplication maps of ample bundles with nef bundles on toric surfaces2008

    • Author(s)
      D. Kondo and S. Ogata
    • Journal Title

      Interdisc. Inform. Sciences

      Volume: 14 Pages: 183-190

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Journal Article] On multiplication maps of ample bundles with nef bundles on toric surfaces2008

    • Author(s)
      D. Kondo, S. Ogata
    • Journal Title

      Interdisc. Inform. Sciences 14

      Pages: 183-190

    • Related Report
      2009 Self-evaluation Report
    • Peer Reviewed
  • [Journal Article] On multiplication maps of ample bundles with nef bundles2008

    • Author(s)
      D. Kondo
    • Journal Title

      Interdisc. Inform. Sciences 14

      Pages: 183-190

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Motivic sheaves and intersection cohomology2007

    • Author(s)
      M. Hanamura
    • Journal Title

      Advenced Studies in Pure Math. 46

      Pages: 67-76

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] F-blowups of F-regular surface singularities

    • Author(s)
      N. Hara
    • Journal Title

      Proc. AMS

    • Related Report
      2010 Final Research Report
    • Peer Reviewed
  • [Presentation] Higher-dimensional continued linear fractions for cyclic quotient singularities2011

    • Author(s)
      足利正
    • Organizer
      Workshop on Singularity
    • Place of Presentation
      東京理科大学
    • Year and Date
      2011-01-22
    • Related Report
      2010 Final Research Report
  • [Presentation] Monkowski sums of lattice polytopes and their normality2010

    • Author(s)
      尾形庄悦
    • Organizer
      54th Annual Meeting of the Australian Mathematical Society
    • Place of Presentation
      The University of Queensland, オーストラリア
    • Year and Date
      2010-09-28
    • Related Report
      2010 Final Research Report
  • [Presentation] On affine semi-normal toric varieties2010

    • Author(s)
      石田正典
    • Organizer
      Fudan-Tohoku Joint Workshop on Algebraic Geometry
    • Place of Presentation
      Fudan University, 中国
    • Year and Date
      2010-05-31
    • Related Report
      2010 Final Research Report
  • [Presentation] On affine semi-normal toric varieties2010

    • Author(s)
      石田正典
    • Organizer
      Fudan-Tohoku Joint Workshop on Algebraic Geometry
    • Place of Presentation
      復旦大学数学科学学院,中國
    • Year and Date
      2010-05-31
    • Related Report
      2010 Annual Research Report
  • [Presentation] 付値環に関するある有限性について2010

    • Author(s)
      梶原健
    • Organizer
      研究集会「トロピカル幾何と計算代数」
    • Place of Presentation
      神戸大学理学部
    • Year and Date
      2010-01-04
    • Related Report
      2010 Final Research Report 2009 Self-evaluation Report
  • [Presentation] Complexes on not necessarily normal toric varieties2009

    • Author(s)
      石田正典
    • Organizer
      東北復旦代数幾何合同シンポジウム
    • Place of Presentation
      東北大学大学院理学研究科
    • Year and Date
      2009-11-26
    • Related Report
      2010 Final Research Report 2009 Self-evaluation Report
  • [Presentation] Complexes on not necessarily normal toric varieties2009

    • Author(s)
      石田正典
    • Organizer
      東北復旦代数幾何合同シンポジウム
    • Place of Presentation
      東北大学
    • Year and Date
      2009-11-26
    • Related Report
      2009 Annual Research Report
  • [Presentation] Algebraic surfaces with pencils of non-hyperelliptic curves of genus 42009

    • Author(s)
      高橋知邦
    • Organizer
      研究集会Branched Coverings, Degenerations, and Related Topics
    • Place of Presentation
      広島大学理学部
    • Year and Date
      2009-03-11
    • Related Report
      2010 Final Research Report
  • [Presentation] Algebraic surfaces with pencils of non-hyperelliptic curves of genus 42009

    • Author(s)
      高橋知邦
    • Organizer
      研究集会 Branched Coverings, Degenerations, and Related Topics
    • Place of Presentation
      広島大学理学部
    • Year and Date
      2009-03-11
    • Related Report
      2009 Self-evaluation Report
  • [Presentation] Cohomology groups of semigroup rings and toric varieties2008

    • Author(s)
      石田正典
    • Organizer
      第30回可換環論シンポジウム
    • Place of Presentation
      佐賀県唐津, 虹の松原ホテル
    • Year and Date
      2008-11-19
    • Related Report
      2008 Annual Research Report
  • [Presentation] 代数体上の直交群の非正規玉河数の密度について2007

    • Author(s)
      雪江明彦
    • Organizer
      日本数学会代数分科会一般講演
    • Place of Presentation
      東北大学
    • Year and Date
      2007-09-24
    • Related Report
      2007 Annual Research Report

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

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