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2017 Fiscal Year Annual Research Report

Similarities between the blocking and anti-blocking polyhedra

Research Project

Project/Area Number 26400185
Research InstitutionYamagata University

Principal Investigator

佐久間 雅  山形大学, 地域教育文化学部, 准教授 (60323458)

Co-Investigator(Kenkyū-buntansha) 柏原 賢二  東京大学, 大学院総合文化研究科, 助教 (70282514) [Withdrawn]
Project Period (FY) 2014-04-01 – 2018-03-31
KeywordsPacking and Covering / Ideal clutter / Packing Property / MFMC Property / safe set / weighted sefe set / network majority
Outline of Annual Research Achievements

①:東京大学の柏原氏との共著で、MFMC clutterとPacking Propertyをもつclutterのクラスの等価性を主張するConforti and Cornuejolsの予想を包含する予想である、Cornuejols, Guenin and Margotの予想を解くためのスキームを提示し、Cornuejols, Guenin and Tuncelの未解決問題のideal packing clutterにおける類似(「Fano Plane 以外の射影平面は、ideal minimally non packing clutterのtilde coreにならない。」)を証明した論文が、Springer monograph(Indean Statistical Institute Series)として出版予定である。②:湘南工科大学の中上川氏との共著において、コードダイアグラムの展開式を用いてTutte polynomialの(x,y)=(2,-1)における値の組合せ論的意味付けを世界で初めて与えた。当該論文はDiscrete Mathにおいて出版された。③:ハンガリー国レニー研究所のZsolt Tuza氏等7名の共著において、「ネットワーク構造における多数決概念」を安全集合というグラフ理論上の概念を用いて定式化することに成功し、このパラメタの計算量的な解析を行った。当該論文はNetworksにおいて出版された。④:インド統計学研究所のR.B.Bapat氏、ハンガリー国レ二ー研究所のZsolt Tuza氏や九州大学の大舘氏等13名の共著において、グラフのパラメタである安全数が木幅が制限されたグラフの族において多項式時間で計算可能であることなどを証明した。当該論文は、Journal of Combinatorial Optimizationにおいて出版された。

  • Research Products

    (13 results)

All 2018 2017 Other

All Int'l Joint Research (6 results) Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results) Presentation (1 results) (of which Int'l Joint Research: 1 results) Remarks (1 results)

  • [Int'l Joint Research] Universidad de Castilla-La Mancha(Spain)

    • Country Name
      Spain
    • Counterpart Institution
      Universidad de Castilla-La Mancha
  • [Int'l Joint Research] LRIUniversity Paris-Sud/LIAFAUniversity Paris-Diderot(France)

    • Country Name
      France
    • Counterpart Institution
      LRIUniversity Paris-Sud/LIAFAUniversity Paris-Diderot
  • [Int'l Joint Research] MTA Renyi Institute/University of Pannonia(Hungary)

    • Country Name
      Hungary
    • Counterpart Institution
      MTA Renyi Institute/University of Pannonia
  • [Int'l Joint Research] Shandong University(China)

    • Country Name
      China
    • Counterpart Institution
      Shandong University
  • [Int'l Joint Research] Indian Statistical Institute(India)

    • Country Name
      India
    • Counterpart Institution
      Indian Statistical Institute
  • [Int'l Joint Research]

    • # of Other Countries
      1
  • [Journal Article] On ideal minimally non-packing clutters2018

    • Author(s)
      Kenji Kashiwabara and Tadashi Sakuma
    • Journal Title

      Mathematical Programming and Game Theory (Springer research monograph)

      Volume: 印刷中 Pages: 印刷中

    • Peer Reviewed
  • [Journal Article] The Expansion of a Chord Diagram and the Tutte Polynomial2018

    • Author(s)
      Tomoki Nakamigawa and Tadashi Sakuma
    • Journal Title

      Discrete Mathematics

      Volume: 341 Pages: 1573--1581

    • DOI

      10.1016/j.disc.2018.02.015

    • Peer Reviewed
  • [Journal Article] Safe Sets, Network Majority on Weighted Trees2018

    • Author(s)
      Ravindra B. Bapat, Shinya Fujita, Sylvain Legay, Yannis Manoussakis, Yasuko Matsui, Tadashi Sakuma, Zsolt Tuza
    • Journal Title

      Networks

      Volume: 71 Pages: 81--92

    • DOI

      10.1002/net.21794

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Safe sets in graphs: Graph classes and structural parameters2018

    • Author(s)
      Raquel Agueda, Nathann Cohen, Shinya Fujita, Sylvain Legay, Yannis Manoussakis, Yasuko Matsui, Leandro Montero, Reza Naserasr, Hirotaka Ono, Yota Otachi, Tadashi Sakuma, Zsolt Tuza, Renyu Xu
    • Journal Title

      Journal of Combinatorial Optimization

      Volume: 印刷中 Pages: 印刷中

    • DOI

      10.1007/s10878-017-0205-2

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Expansion of a Chord Diagram and the Tutte Polynomial2017

    • Author(s)
      Tomoki Nakamigawa and Tadashi Sakuma
    • Journal Title

      Electronic Notes in Discrete Mathematics

      Volume: 61C Pages: 917--923

    • DOI

      10.1016/j.endm.2017.07.054

    • Peer Reviewed
  • [Presentation] Minimally non-ideal clutters and ideal minimally non-packing clutters2017

    • Author(s)
      Tadashi Sakuma
    • Organizer
      The 10th Anniversary Conference on Nonlinear Analysis and Convex Analysis
    • Int'l Joint Research
  • [Remarks] 研究者詳細

    • URL

      http://yudb.kj.yamagata-u.ac.jp/html/240_ronbn_1_ja.html

URL: 

Published: 2018-12-17  

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