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Singularity theory of product maps and its applications

Research Project

Project/Area Number 26800042
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Geometry
Research InstitutionKyoto University (2016-2017)
Kyushu University (2014-2015)

Principal Investigator

Takao Kazuto  京都大学, スーパーグローバルコース数学系ユニット, 特定助教 (80643832)

Project Period (FY) 2014-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2014: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords可微分写像 / 特異点 / Stein分解 / 低次元多様体 / Heegaard分解 / 結び目 / 橋位置 / 橋分解 / 橋球面 / ブラジル
Outline of Final Research Achievements

I worked on a new area in singularity theory of differentiable maps with particular attention to product structures of maps, and on its applications to low-dimensional topology. In consequence, I made steady progress on the stability and deformations of singularities of the product map of multiple functions, which will hopefully base future developments and applications. I also worked on related topics and obtained some unexpected results, including a certain significant discovery on the theory of bridges of knots.

Report

(5 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (20 results)

All 2017 2016 2015 2014

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results,  Acknowledgement Compliant: 2 results) Presentation (16 results)

  • [Journal Article] A knot with destabilized bridge spheres of arbitrarily high bridge number2016

    • Author(s)
      Yeonhee Jang, Tsuyoshi Kobayashi, Makoto Ozawa, Kazuto Takao
    • Journal Title

      J. London Math.

      Volume: 93 Issue: 2 Pages: 379-396

    • DOI

      10.1112/jlms/jdw004

    • NAID

      120006658032

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Two Morse functions and singularities of the product map2016

    • Author(s)
      Kazuto Takao
    • Journal Title

      Comm. Anal. Geom.

      Volume: 24 Issue: 3 Pages: 645-671

    • DOI

      10.4310/cag.2016.v24.n3.a8

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Heegaard splittings and singularities of the product map of Morse functions2014

    • Author(s)
      Kazuto Takao
    • Journal Title

      Trans. Amer. Math. Soc.

      Volume: 366 Issue: 4 Pages: 2209-2226

    • DOI

      10.1090/s0002-9947-2013-06015-1

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Journal Article] Lips and swallow-tails of singularities of product maps2014

    • Author(s)
      Kazuto Takao
    • Journal Title

      J. Singul.

      Volume: 10

    • DOI

      10.5427/jsing.2014.10t

    • Related Report
      2014 Research-status Report
    • Peer Reviewed
  • [Presentation] On bridge positions and bridge decompositions2017

    • Author(s)
      Kazuto Takao
    • Organizer
      The 12th East Asian School of Knots and Related Topics
    • Place of Presentation
      東京大学
    • Year and Date
      2017-02-15
    • Related Report
      2016 Research-status Report
  • [Presentation] Singularities of three functions and the product maps2017

    • Author(s)
      Kazuto Takao
    • Organizer
      Geometric and Algebraic Singularity Theory
    • Related Report
      2017 Annual Research Report
  • [Presentation] 安定写像の境界和について2017

    • Author(s)
      高尾和人
    • Organizer
      可微分写像の特異点論の局所的研究と大域的研究
    • Related Report
      2017 Annual Research Report
  • [Presentation] Singularities of three functions and the product maps2016

    • Author(s)
      高尾和人
    • Organizer
      トポロジー・幾何セミナー
    • Place of Presentation
      広島大学
    • Year and Date
      2016-11-29
    • Related Report
      2016 Research-status Report
  • [Presentation] Heegaard surfaces and singularities of product maps2016

    • Author(s)
      高尾和人
    • Organizer
      低次元トポロジーセミナー
    • Place of Presentation
      京都大学
    • Year and Date
      2016-11-24
    • Related Report
      2016 Research-status Report
  • [Presentation] 結び目の橋位置と橋分解2016

    • Author(s)
      高尾和人
    • Organizer
      N-KOOKセミナー
    • Place of Presentation
      大阪市立大学文化交流センター
    • Year and Date
      2016-10-22
    • Related Report
      2016 Research-status Report
  • [Presentation] A survey on Heegaard surfaces of 3-manifolds2016

    • Author(s)
      高尾和人
    • Organizer
      特異点論ミニワークショップ "GERMS BE AMBITIOUS"
    • Place of Presentation
      北海道大学
    • Year and Date
      2016-08-24
    • Related Report
      2016 Research-status Report
  • [Presentation] Singularities of three functions and the product maps2016

    • Author(s)
      Kazuto Takao
    • Organizer
      14th International Workshop on Real and Complex Singularities
    • Place of Presentation
      サンパウロ大学
    • Year and Date
      2016-07-28
    • Related Report
      2016 Research-status Report
  • [Presentation] On bridge positions, bridge decompositions and bridge spheres2015

    • Author(s)
      高尾和人
    • Organizer
      Friday Seminar on Knot Theory
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2015-12-11
    • Related Report
      2015 Research-status Report
  • [Presentation] Local moves of the Stein factorization of the product map of two functions2015

    • Author(s)
      Kazuto Takao
    • Organizer
      The sixth Japanese-Australian Workshop on Real and Complex Singularities
    • Place of Presentation
      鹿児島大学
    • Year and Date
      2015-11-26
    • Related Report
      2015 Research-status Report
  • [Presentation] Heegaard分解と直積写像の特異点2015

    • Author(s)
      高尾和人
    • Organizer
      ハンドル体結び目とその周辺Ⅷ
    • Place of Presentation
      早稲田大学
    • Year and Date
      2015-09-27
    • Related Report
      2015 Research-status Report
  • [Presentation] Heegaard splittings and singularities of product maps2015

    • Author(s)
      Kazuto Takao
    • Organizer
      2nd Brazil-Mexico Meeting on Singularities
    • Place of Presentation
      バイーア連邦大学
    • Year and Date
      2015-07-14
    • Related Report
      2015 Research-status Report
  • [Presentation] Singularities of the product map of two functions2015

    • Author(s)
      高尾和人
    • Organizer
      生成的幾何学における特異点とその応用
    • Place of Presentation
      神戸大学
    • Year and Date
      2015-06-05
    • Related Report
      2015 Research-status Report
  • [Presentation] Realizing local moves of the Stein factorizations of smooth maps from 3-manifolds to 2-manifolds2014

    • Author(s)
      Kazuto Takao
    • Organizer
      13th International Workshop on Real and Complex Singularities
    • Place of Presentation
      サンパウロ大学
    • Year and Date
      2014-07-30
    • Related Report
      2014 Research-status Report
  • [Presentation] Incompressible surfaces and Heegaard surfaces in 3-manifolds2014

    • Author(s)
      高尾和人
    • Organizer
      Intersection of Pure Mathematics and Applied Mathematics V
    • Place of Presentation
      九州大学
    • Year and Date
      2014-05-16
    • Related Report
      2014 Research-status Report
  • [Presentation] 任意に橋数の高い既約橋球面をもつ結び目2014

    • Author(s)
      高尾和人
    • Organizer
      トポロジー金曜セミナー
    • Place of Presentation
      九州大学
    • Year and Date
      2014-04-25
    • Related Report
      2014 Research-status Report

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Published: 2014-04-04   Modified: 2019-03-29  

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