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Research of invariants and regular projections of spatial graphs

Research Project

Project/Area Number 18740030
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeSingle-year Grants
Research Field Geometry
Research InstitutionKanazawa University

Principal Investigator

NIKKUNI Ryo  Kanazawa University, 学校教育系, 准教授 (00401878)

Project Period (FY) 2006 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥2,740,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Keywords空間グラフ / 結び目 / 絡み目 / 不変量 / 正則射影図 / Simon不変量 / アキラル / 非自明射影
Research Abstract

空間グラフのホモトピー不変量及びホモロジー不変量の研究を行ない, その結果, 鏡像対称性を含む各種幾何学的対称性との関係の決定, グラフの内在的な非自明性の新種の発見, 直線型空間グラフ理論への応用等の成果を得た. また, 空間グラフの2次元球面への正則射影図の研究を行ない, その結果, 極小非自明な空間グラフの正則射影図の最小交差点数の決定, 非自明射影と呼ばれる正則射影図の最小交差点数の決定等の成果を得た.

Report

(4 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • 2006 Annual Research Report
  • Research Products

    (39 results)

All 2009 2008 2007 2006 Other

All Journal Article (18 results) (of which Peer Reviewed: 14 results) Presentation (20 results) Remarks (1 results)

  • [Journal Article] An intrinsic nontriviality of graphs2009

    • Author(s)
      新國 亮
    • Journal Title

      Algebraic & Geometric Topology 9巻1号

      Pages: 351-364

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Homotopy on spatial graphs and the Sato-Levine invariant2009

    • Author(s)
      Thomas Fleming and. Ryo Nikkuni
    • Journal Title

      Transactions of the American Mathematical Society 361

      Pages: 1885-1902

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An intrinsic nontriviality of graphs2009

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Algebraic & Geometric Topology 9

      Pages: 351-364

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Delta edge-homotopy invariants of spatial graphs via disk-summing the constituent knots2009

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Illinois Journal of Mathematics (in press)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Homotopy on spatial graphs and generalized Sato-Levine invariants2009

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Revista Matematica Complutense (in press)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Achirality of spatial graphs and the Simon invariant2007

    • Author(s)
      新國 亮
    • Journal Title

      Intelligence of Low Dimensional Topology 2006 (Hiroshima), Series on Knots and Everything 40巻

      Pages: 239-243

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Regular projections of spatial graphs, Knot Theory for Scientific Objects2007

    • Author(s)
      新國 亮
    • Journal Title

      Osaka City University Advanced Mathematical Institute Studies 1巻1号

      Pages: 111-128

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Regular projections of spatial graphs2007

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Knot Theory for Scientific Objects, Osaka City University Advanced Mathematical Institute Studies 1,No.1

      Pages: 111-128

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An unknotting theorem for delta and sharp edge-homotopy2007

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Mathematische Nachrichten 280,No.8

      Pages: 897-906

    • NAID

      120000817180

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Achirality of spatial graphs and the Simon invariant2007

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Intelligence of Low Dimensional Topology 2006 (Hiroshima), Ser. Knots Everything, World Sci. Publ. 40

      Pages: 239-243

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] An unknotting theorem for delta and sharp edge-homotopy2007

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Mathematische Nachrichten 280, No. 8(to appear)

    • NAID

      120000817180

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Regular projections of graphs with at most three double points

    • Author(s)
      Youngsik Huh, 新國 亮
    • Journal Title

      Journal of Knot Theory and its Ramifications (掲載決定)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Homotopy on spatial graphs and generalized Sato-Levine invariants

    • Author(s)
      新國 亮
    • Journal Title

      Revista Matematica Complutense (掲載決定)

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Homotopy on spatial graphs and the Sato-Levine invariant

    • Author(s)
      Thomas Fleming and Ryo Nikkuni
    • Journal Title

      Transactions of the American Mathematical Society To appear

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Delta edge-homotopy invariants of spatial graphs via disk-summing the constituent knots

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Illinois Journal of Mathematics To appear

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Achirality of spatial graphs and the Simon invariant

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Proceedings of Intelligence of Low Dimensional Topology 2006 (to appear)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Regular projections of spatial graphs

    • Author(s)
      Ryo Nikkuni
    • Journal Title

      Proceedings of the International Workshop on Knot Theory and Scientific Objects (to appear)

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Homotopy on spatial graphs and the Sato-Levine invariant

    • Author(s)
      Thomas Fleming, Ryo Nikkuni
    • Journal Title

      Transactions of the American Mathematical Society (to appear)

    • Related Report
      2006 Annual Research Report
  • [Presentation] Conway-Gordonの定理の精密化とその応用2009

    • Author(s)
      新國 亮
    • Organizer
      研究集会「結び目理論」
    • Place of Presentation
      東京
    • Year and Date
      2009-03-21
    • Related Report
      2008 Final Research Report
  • [Presentation] Conway-Gordonの定理の精密化とその応用2009

    • Author(s)
      新國亮
    • Organizer
      研究集会「結び目理論」
    • Place of Presentation
      東京女子大学
    • Year and Date
      2009-03-21
    • Related Report
      2008 Annual Research Report
  • [Presentation] Knots in rectilinear spatial complete graphs and homological invariants2008

    • Author(s)
      新國 亮
    • Organizer
      研究集会「結び目の数学」
    • Place of Presentation
      東京
    • Year and Date
      2008-12-24
    • Related Report
      2008 Final Research Report
  • [Presentation] Knots in rectilinear spatial complete graphs and homological invariants2008

    • Author(s)
      新國亮
    • Organizer
      研究集会「結び目の数学」
    • Place of Presentation
      東京女子大学
    • Year and Date
      2008-12-24
    • Related Report
      2008 Annual Research Report
  • [Presentation] An intrinsic non-triviality of graphs2008

    • Author(s)
      新國 亮
    • Organizer
      AMS Sectional Meetings(2008 Spring Western Section Meeting)
    • Place of Presentation
      クレアモント
    • Year and Date
      2008-05-04
    • Related Report
      2008 Final Research Report
  • [Presentation]2008

    • Author(s)
      法貴 孝哲, 新國 亮, 谷山 公規
    • Organizer
      Clasp-pass moves on spatial handcuff graphs, AMS Sectional Meetings(2008 Spring Western Section Meeting)
    • Place of Presentation
      クレアモント
    • Year and Date
      2008-05-04
    • Related Report
      2008 Final Research Report
  • [Presentation] Clasp-pass moves on spatial handcuff graphs2008

    • Author(s)
      Takaaki Hoki, Ryo Nikkuni and Kouki Taniyama
    • Organizer
      AMS Sectional Meetings (2008 Spring Western Section Meeting)
    • Place of Presentation
      Claremont McKenna College
    • Year and Date
      2008-05-04
    • Related Report
      2008 Annual Research Report
  • [Presentation] An intrinsic non-triviality of graphs2008

    • Author(s)
      Ryo Nikkuni
    • Organizer
      AMS Sectional Meetings (2008 Spring Western Section Meeting)
    • Place of Presentation
      Claremont McKenna College
    • Year and Date
      2008-05-04
    • Related Report
      2008 Annual Research Report
  • [Presentation] On spatial graph diagrams with at most three crossings2008

    • Author(s)
      Youngsik Huh, 新國 亮
    • Organizer
      he Fourth East Asian School of Knots, Links and Related Topics
    • Place of Presentation
      東京
    • Year and Date
      2008-01-22
    • Related Report
      2008 Final Research Report
  • [Presentation] On spatial graph diagrams with at most three crossings2008

    • Author(s)
      Ryo Nikkuni
    • Organizer
      The fourth East Asian School of Knots and Related Topics
    • Place of Presentation
      東京大学
    • Year and Date
      2008-01-22
    • Related Report
      2007 Annual Research Report
  • [Presentation] On spatial graph diagrams with at most three crossings2007

    • Author(s)
      Youngsik Huh, 新國 亮
    • Organizer
      研究集会「結び目のトポロジーX」
    • Place of Presentation
      東京
    • Year and Date
      2007-12-23
    • Related Report
      2008 Final Research Report
  • [Presentation] On spatial graph diagrams with at most three crossings2007

    • Author(s)
      Ryo Nikkuni
    • Organizer
      結び目のトポロジーX
    • Place of Presentation
      東京女子大学
    • Year and Date
      2007-12-23
    • Related Report
      2007 Annual Research Report
  • [Presentation] Homotopy on spatial graphs and generalized Sato-Levine invariants2007

    • Author(s)
      新國 亮
    • Organizer
      Knotting Mathematics and Art
    • Place of Presentation
      タンパ
    • Year and Date
      2007-11-04
    • Related Report
      2008 Final Research Report
  • [Presentation] Homotopy on spatial graphs and generalized Sato-Levine invariants2007

    • Author(s)
      Ryo Nikkuni
    • Organizer
      Knotting Mathematics and Art: Conference in Low Dimensional Topology and Mathematical Art
    • Place of Presentation
      University of South Florida
    • Year and Date
      2007-11-04
    • Related Report
      2007 Annual Research Report
  • [Presentation] Homotopy on spatial graphs and generalized Sato-Levine invariants2007

    • Author(s)
      新國 亮
    • Organizer
      Intelligence of Low Dimensional Topology 兼 拡大KOOK セミナー
    • Place of Presentation
      大阪
    • Year and Date
      2007-08-31
    • Related Report
      2008 Final Research Report
  • [Presentation] Homotopy on spatial graphs and generalized Sato-Levine invariants2007

    • Author(s)
      Ryo Nikkuni
    • Organizer
      Intelligence of Low Dimensional Topology 兼 拡大KOOKセミナー
    • Place of Presentation
      大阪市立大学
    • Year and Date
      2007-08-31
    • Related Report
      2007 Annual Research Report
  • [Presentation] Symmetries of spatial graphs and Simon invariants2007

    • Author(s)
      新國 亮, 谷山 公規
    • Organizer
      Third East Asian School of Knots, Links and Related Topics
    • Place of Presentation
      大阪
    • Year and Date
      2007-02-05
    • Related Report
      2008 Final Research Report
  • [Presentation] グラフの極小化可能性と一般化された非自明射影について2006

    • Author(s)
      小林 一章, 新國 亮
    • Organizer
      研究集会「結び目のトポロジーIX」
    • Place of Presentation
      東京
    • Year and Date
      2006-12-20
    • Related Report
      2008 Final Research Report
  • [Presentation] Symmetries of spatial graphs and Simon invariants2006

    • Author(s)
      新國 亮, 谷山 公規
    • Organizer
      研究集会「結び目のトポロジーIX」
    • Place of Presentation
      東京
    • Year and Date
      2006-12-19
    • Related Report
      2008 Final Research Report
  • [Presentation] Achirality of spatial graphs and the Simon invariant2006

    • Author(s)
      新國 亮
    • Organizer
      Intelligence of Low Dimensional Topology 2006
    • Place of Presentation
      広島
    • Year and Date
      2006-07-23
    • Related Report
      2008 Final Research Report
  • [Remarks] ホームページアドレス

    • URL

      http://www.lab.twcu.ac.jp/nick

    • Related Report
      2008 Final Research Report

URL: 

Published: 2006-04-01   Modified: 2016-04-21  

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