• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Symmetric unions and essential surfaces

Research Project

Project/Area Number 19K03465
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 11020:Geometry-related
Research InstitutionGifu University

Principal Investigator

Tanaka Toshifumi  岐阜大学, 教育学部, 准教授 (60396851)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2021: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Keywordsリボン結び目 / 対称和 / 曲面 / 結び目 / 本質的曲面
Outline of Research at the Start

結び目の補空間の曲面を幾何学的手法を用いて調べることで、結び目対称和の特徴づけ及び分類を行う。具体的な問題としては「すべてのリボン結び目が対称和表示を与えるか」を幾何学的な手法を用いて研究する。そのために結び目の補空間の本質的曲面を、2つの曲面の交わりとして現れる曲線の位置を調べグラフ化することで、結び目の形状や対称性によって曲面がどのような特徴を持つか考察することにより、この問題に取り組む。

Outline of Final Research Achievements

The purpose of this study is to characterize and classify symmetric unions. In 1984, Menasco introduced an effective method for studying a surface in the exterior of an alternating knot and solved some important problems in knot theory. In that method, a surface is characterized by considering the property of curves that appears at the intersection of the surface and a sphere of the knot complement. I have characterized and classified symmetric unions by investigating the intersection of surfaces in the knot complement using similar methods. As a result, we could characterize surfaces in the knot complement using the three-dimensional topology and characterize symmetric unions

Academic Significance and Societal Importance of the Research Achievements

これまでの結び目の対称和の研究では,主に代数的な手法が用いられてきた。私は本研究において,3次元位相幾何学的に手法を用いて研究を行い,実際にそれが対称和の分類に役立つことを示す研究成果を得ることができた。さらにその幾何学的手法を発展させることで,本研究分野において,より多くの研究成果を得られることが期待できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (9 results)

All 2022 2021 2020 2019

All Journal Article (5 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (4 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] A formula for the Jones polynomial of symmetric unions2022

    • Author(s)
      Tanaka, Toshifumi
    • Journal Title

      岐阜大学教育学部研究報告(自然科学)

      Volume: 46 Pages: 1-6

    • Related Report
      2021 Annual Research Report
    • Open Access
  • [Journal Article] On satellite knots with symmetric union presentations2021

    • Author(s)
      Tanaka, Toshifumi
    • Journal Title

      Osaka J. Math.

      Volume: 58 Pages: 685-696

    • NAID

      120007124662

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On equivalence of symmetric union presentations for ribbon knot2021

    • Author(s)
      Tanaka, Toshifumi
    • Journal Title

      J. Knot Theory Ramifications

      Volume: 30 Issue: 08

    • DOI

      10.1142/s0218216521500589

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On Fox colorings of symmetric unions2021

    • Author(s)
      Toshifumi Tanaka
    • Journal Title

      岐阜大学教育学部研究報告(自然科学)

      Volume: 45 Pages: 11-14

    • NAID

      120007044380

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Journal Article] On composite knots with symmetric union presentations2019

    • Author(s)
      田中利史
    • Journal Title

      Journal of Knot Theory and Its Ramifications

      Volume: 28 Issue: 10 Pages: 1-22

    • DOI

      10.1142/s0218216519500652

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] On equivalence of symmetric union presentations for ribbon knot2021

    • Author(s)
      田中利史
    • Organizer
      拡大KOOKセミナー 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] On knots and links with symmetric union presentations2020

    • Author(s)
      Toshifumi Tanaka
    • Organizer
      拡大KOOKセミナー 2020
    • Related Report
      2020 Research-status Report
  • [Presentation] Symmetric unions and essential tori2020

    • Author(s)
      田中利史
    • Organizer
      Knots and Spatial Graphs 2020
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] On satellite knots with symmetric union presentations2019

    • Author(s)
      田中利史
    • Organizer
      トポロジーとコンピュータ2019
    • Related Report
      2019 Research-status Report

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi