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Research on polymer topology via knot theory

Research Project

Project/Area Number 26800081
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Foundations of mathematics/Applied mathematics
Research InstitutionYamaguchi University

Principal Investigator

Ishihara Kai  山口大学, 教育学部, 講師 (40634762)

Research Collaborator SHIMOKAWA Koya  
BUCK Dorothy  
RATHBUN Matthew  
VAZQUEZ Mariel  
ARUSUAGA Javier  
SOTEROS Chris  
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
KeywordsDNA結び目 / バンド手術 / 交差交換 / 格子結び目 / 部位特異的組み換え / DNAの部位特異的組み換え / 格子絡み目
Outline of Final Research Achievements

For application to studies of topology of polymers such as DNA and enzyme, we studied band surgeries and crossing changes on links, and studied lattice knots. In this project, we obtained the following results. First, we gave concrete pathways by band surgeries for each knot up to 7 crossings and each 2-component link up to 6 crossings. Also we showed that the pathways have diversity in general. Next, we gave a characterization for a single band surgery or a single crossing change between two fibered links. Some examples of band surgeries are determined by applying this result. Finally, we characterized lattice knots in a confined region.

Report

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

    (6 results)

All 2017 2016 2015 2014

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Acknowledgement Compliant: 3 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results)

  • [Journal Article] Bounds for minimum step number of knots confined to tubes in the simple cubic lattice2017

    • Author(s)
      Ishihara, Kai; Pouokam, Maxime; Suzuki, Atsumi; Scharein, Robert; Vazquez, Mariel; Arsuaga, Javier; Shimokawa, Koya
    • Journal Title

      Journal of Physics A: Mathematical and Theoretical

      Volume: 50 Issue: 21 Pages: 1-28

    • DOI

      10.1088/1751-8121/aa6a4f

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Band surgeries and crossing changes between fibered links2016

    • Author(s)
      Dorothy Buck, Kai Ishihara, Matt Rathbun, Koya Shimokawa
    • Journal Title

      Journal of the London Mathematical Society

      Volume: 93

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] On coherent band pathways between knots and links2015

    • Author(s)
      Dorothy Buck, Kai Ishihara
    • Journal Title

      Journal of Knot Theory and Its Ramifications

      Volume: 24 Issue: 02 Pages: 1-21

    • DOI

      10.1142/s0218216515500066

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] DNAの部位特異的組換えと絡み目のバンド手術2016

    • Author(s)
      石原海
    • Organizer
      生命ダイナミクスの数理とその応用
    • Place of Presentation
      東京大学玉原国際セミナーハウス(群馬県沼田市)
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] The nomenclature of graphs and its application in polymer chemistry2016

    • Author(s)
      石原海
    • Organizer
      Topology and graphs in polymer chemistry
    • Place of Presentation
      東京工業大学 東工大蔵前会館 (東京都目黒区)
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Unknotting operation of 2-bridge knots and lattice polygons in tube2014

    • Author(s)
      Kai Ishihara
    • Organizer
      8th Australia New Zealand Mathematics Convention
    • Place of Presentation
      Melbourne University, Australia
    • Year and Date
      2014-12-12
    • Related Report
      2014 Research-status Report
    • Invited

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Published: 2014-04-04   Modified: 2018-03-22  

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