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2015 Fiscal Year Annual Research Report

対称分子構造に対する組合せ剛性理論の構築

Research Project

Project/Area Number 24740058
Research InstitutionKyoto University

Principal Investigator

谷川 眞一  京都大学, 数理解析研究所, 助教 (30623540)

Project Period (FY) 2012-04-01 – 2016-03-31
Keywords計数マトロイド / 群ラベル付きグラフ / グラフの剛性
Outline of Annual Research Achievements

対称グラフの剛性の必要条件として現れる群ラベル付きグラフ上での組合せ的計数条件を一般化することによって,群ラベル付きグラフ上での新たなマトロイドの構成手法を開発した。これまで知られている構成法はEdmondsによる交差劣モジュラ関数理論の特殊ケースであったが,本研究ではEdmondsの定理では解析できない広範囲の離散構造を取り扱うことに成功した。この構成法によって,既知の剛性必要条件がマトロイドを構成すること解明され,統一的な議論で対称グラフの剛性の解析が可能となった。

  • Research Products

    (5 results)

All 2016 2015 Other

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

  • [Int'l Joint Research] Eotvos University(Hungary)

    • Country Name
      Hungary
    • Counterpart Institution
      Eotvos University
  • [Journal Article] Gain-sparsity and symmetry-forced rigidity in the plane2016

    • Author(s)
      Tibor Jordan, Viktoria Kaszanitzky, and Shin-ichi Tanigawa
    • Journal Title

      Discrete & Computational Geometry

      Volume: 55 Pages: 314-372

    • DOI

      10.1007/s00454-015-9755-1

    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Count matroids of group-labeled graphs2015

    • Author(s)
      Ritanro Ikeshita and Shin-ichi Tanigawa
    • Journal Title

      arXiv

      Volume: 1507.01259 Pages: 1-16

    • Open Access / Acknowledgement Compliant
  • [Presentation] Sparsity count on group-labeled graphs for characterizing the infinitesimal rigidity of symmetric frameworks2015

    • Author(s)
      谷川眞一
    • Organizer
      Advances in Combinatorial and Geometric Rigidity
    • Place of Presentation
      バンフ(カナダ)
    • Year and Date
      2015-07-15 – 2015-07-15
    • Int'l Joint Research
  • [Presentation] Matroids of group-labeled graphs in graph rigidity2015

    • Author(s)
      谷川眞一
    • Organizer
      The DIAMANT symposium
    • Place of Presentation
      Veenendaal(オランダ)
    • Year and Date
      2015-05-28 – 2015-05-28
    • Int'l Joint Research

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Published: 2017-01-06  

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