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Study on quasipositive surfaces in manifolds with contact structures and applications to complex singularity theory

Research Project

Project/Area Number 22740032
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Geometry
Research InstitutionTohoku University

Principal Investigator

ISHIKAWA Masaharu  東北大学, 大学院・理学研究科, 准教授 (10361784)

Project Period (FY) 2010 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords特異点論 / 低次元トポロジー / 接触構造 / 特異点 / ミルナー束 / 3次元多様体論 / オープンブック分解 / ファイバー結び目 / Stein fillable
Research Abstract

Let S be the unit sphere in the 2-dimensional complex vector space. For each point x in S, let H be the tangent space of S at x. We then rotate H by multiplying the complex symbol J and obtain another plane JH. The intersection of H and JH is a 2-plane in the tangent space H. The collection of such an H for all x in S is called the standard contact structure on S. In this project, we studied the Milnor fibration of an isolated singularity of a polynomial map which is obtained as a product of a complex polynomial and a complex conjugate polynomial, and proved that the compatible contact structure of such a Milnor fibration is always not the standard one.

Report

(4 results)
  • 2012 Annual Research Report   Final Research Report ( PDF )
  • 2011 Annual Research Report
  • 2010 Annual Research Report
  • Research Products

    (20 results)

All 2013 2012 2011 2010

All Journal Article (5 results) (of which Peer Reviewed: 4 results) Presentation (15 results) (of which Invited: 2 results)

  • [Journal Article] Tangle sums, norm curves, and cyclic surgeries2013

    • Author(s)
      Masaharu Ishikawa, Thomas W. Mattman, Koya Shimokawa
    • Journal Title

      Proceedings of the June 2012 RIMS Seminar "Representation spaces, twisted topological invariants and geometric structures of 3-manifolds."

      Volume: 未定 Pages: 18-33

    • Related Report
      2012 Annual Research Report
  • [Journal Article] Compatible contact structu res of fibered Seifert links in homo logy 3-spheres2012

    • Author(s)
      石 川昌治
    • Journal Title

      Tohoku Mathematical Journal

      Volume: 64巻 Pages: 25-59

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Compatible contact structures of fibered Seifert links in homology 3-spheres2012

    • Author(s)
      Masaharu Ishikawa
    • Journal Title

      Tohoku Mathematical Journal

      Volume: 64 Pages: 25-59

    • NAID

      130005128508

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Legendrian framings for two-bridge l inks2011

    • Author(s)
      Sebastian Baader, 石 川昌治
    • Journal Title

      Proceedings of American Mathem atical Society

      Volume: 139巻 Pages: 4513-4520

    • Related Report
      2012 Final Research Report
    • Peer Reviewed
  • [Journal Article] Legendrian framings for two-bridge links2011

    • Author(s)
      Sebastian Baader, Masaharu Ishikawa
    • Journal Title

      Proceedings of American Mathematical Society

      Volume: 139 Pages: 4513-4520

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Presentation] On the factorization of A- polynomials2012

    • Author(s)
      石 川昌治
    • Organizer
      研究集会「Topology of Singularities and related topics, III」
    • Place of Presentation
      ダラット大学(ベト ナム)
    • Year and Date
      2012-03-27
    • Related Report
      2012 Final Research Report
  • [Presentation] On the factorization of A- polynomials2012

    • Author(s)
      石 川昌治
    • Organizer
      研究集会「Topology of Singularities and related topics
    • Place of Presentation
      ダラット大学(ベト ナム)
    • Year and Date
      2012-03-27
    • Related Report
      2012 Final Research Report
  • [Presentation] On the factorization of A-polynomials2012

    • Author(s)
      Masaharu Ishikawa
    • Organizer
      Topology of Singularities and related topics, III
    • Place of Presentation
      ダラット大学(ベトナム)
    • Year and Date
      2012-03-27
    • Related Report
      2011 Annual Research Report
  • [Presentation] Tangle sums and factorizat ion of A-polynomials2012

    • Author(s)
      石 川昌治
    • Organizer
      第7回 代数・解 析・幾何学セミナー
    • Place of Presentation
      鹿 児島大学
    • Year and Date
      2012-02-14
    • Related Report
      2012 Final Research Report
  • [Presentation] Tangle sums and factorization of A-polynomials2012

    • Author(s)
      Masaharu Ishikawa
    • Organizer
      第7回代数・解析・幾何学セミナー
    • Place of Presentation
      鹿児島大学
    • Year and Date
      2012-02-14
    • Related Report
      2011 Annual Research Report
  • [Presentation] Tangle sums and factorization of A-polynomials2012

    • Author(s)
      Masaharu Ishikawa
    • Organizer
      RIMS合宿セミナー「Representation spaces, twisted topological invariants and geometric structures of 3-manifolds」
    • Place of Presentation
      強羅
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Milnor fibrations and contact structures on the 3-sphere2012

    • Author(s)
      Masaharu Ishikawa
    • Organizer
      特異点セミナー
    • Place of Presentation
      リール大学(リール、フランス)
    • Related Report
      2012 Annual Research Report
    • Invited
  • [Presentation] Tangle sums and factorizat ion of A-polynomials2011

    • Author(s)
      石 川昌治
    • Organizer
      研究集会「GCOE Workshop, Circle valued Morse theory and Alexander invariants」
    • Place of Presentation
      東京大学
    • Year and Date
      2011-11-16
    • Related Report
      2012 Final Research Report
  • [Presentation] Tangle sums and factorization of A-polynomials2011

    • Author(s)
      Masaharu Ishikawa
    • Organizer
      GCOE Workshop, Circle valued Morse theory and Alexander invariants
    • Place of Presentation
      東京大学
    • Year and Date
      2011-11-16
    • Related Report
      2011 Annual Research Report
  • [Presentation] f¥bar g-型特異点のミルナー束と両立する接触構造について2011

    • Author(s)
      石川昌治
    • Organizer
      研究集 会「接触構造・特異点・微分方程式およびその周辺」
    • Place of Presentation
      京都市職 員厚生会 職員会館かもがわ
    • Year and Date
      2011-01-24
    • Related Report
      2012 Final Research Report
  • [Presentation] f¥bar g-型特異点のミルナー束と両立する接触構造について2011

    • Author(s)
      石川昌治
    • Organizer
      接触構造・特異点・微分方程式およびその周辺
    • Place of Presentation
      京都市職員厚生会職員会館かもがわ
    • Year and Date
      2011-01-24
    • Related Report
      2010 Annual Research Report
  • [Presentation] Milnor fibrations and cont act structures on S^32011

    • Author(s)
      石川昌治
    • Organizer
      研究集会「Top ology of Singularities and Related T opics, II」
    • Place of Presentation
      東北大学
    • Year and Date
      2011-01-08
    • Related Report
      2012 Final Research Report
  • [Presentation] Milnor fibrations and contact structures on S^32011

    • Author(s)
      石川昌治
    • Organizer
      Topology of Singularities and Related Topics, II
    • Place of Presentation
      東北大学
    • Year and Date
      2011-01-08
    • Related Report
      2010 Annual Research Report
  • [Presentation] On the compatible contact structures of fibered Seifert links in homology 3-spheres2010

    • Author(s)
      石川昌治
    • Organizer
      研究集会「Kno ts, Contact Geometry and Floer Homol ogy」
    • Place of Presentation
      東京大学
    • Year and Date
      2010-05-27
    • Related Report
      2012 Final Research Report
  • [Presentation] On the compatible contact structures of fibered Seifert links in homology 3-spheres2010

    • Author(s)
      石川昌治
    • Organizer
      Knots, Contact Geometry and Floer Homology
    • Place of Presentation
      東京大学
    • Year and Date
      2010-05-27
    • Related Report
      2010 Annual Research Report

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Published: 2010-08-23   Modified: 2019-07-29  

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