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The links between algebraic coding theory and matroid theory

Research Project

Project/Area Number 17K05348
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Foundations of mathematics/Applied mathematics
Research InstitutionKumamoto University

Principal Investigator

Shiromoto Keisuke  熊本大学, 大学院先端科学研究部(工), 教授 (00343666)

Co-Investigator(Kenkyū-buntansha) 千葉 周也  熊本大学, 大学院先端科学研究部(工), 准教授 (80579764)
Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Discontinued (Fiscal Year 2020)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2019: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords符号理論 / マトロイド / ネットワーク符号化 / 階数距離符号 / 臨界指数 / 線形符号 / 階数符号 / 臨界問題 / 応用数学 / 数理工学 / 情報基礎 / 組合せ論
Outline of Final Research Achievements

Based on the existence problems and the construction problems in algebraic coding theory, we studied same kinds of problems in matroid theory and network coding theory. Then we mainly had the following results: (1) We proved a special case of the Walton-Welsh conjecture on the critical exponents if representable matroids. (2) We gave some constructions of tangential blocks in matroid theory. (3) We proved a matroidal equation and a Wei type duality for rank-metric codes over a finite field.

Academic Significance and Societal Importance of the Research Achievements

符号理論とは,デジタル情報を伝送または記録する際に生じる誤りを理論的に訂正するための誤り訂正符号の理論であり,その代数構造に着目して数理的研究をおこなうことが代数的符号理論である.本研究において得られた研究成果については,主にグラフと符号の広義の統一化が進み,グラフ理論の様々な結果がマトロイドを介して符号理論へフィードバック可能となると予想する.また,準一様符号に対する組合せ論的アプローチより広い意味でネットワーク符号化に関する新たな観点からの応用研究が可能になることが期待される.

Report

(4 results)
  • 2020 Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (37 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (3 results) Journal Article (10 results) (of which Int'l Joint Research: 3 results,  Peer Reviewed: 9 results,  Open Access: 1 results) Presentation (22 results) (of which Int'l Joint Research: 14 results,  Invited: 7 results) Remarks (2 results)

  • [Int'l Joint Research] University of New South Wales/Monash University(オーストラリア)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of New South Wales/Monash University(オーストラリア)

    • Related Report
      2018 Research-status Report
  • [Int'l Joint Research] University of New South Wales/Monash University(オーストラリア)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Spanning bipartite graphs with high degree sum in graphs2020

    • Author(s)
      G.Chen, S.Chiba, R.J.Gould, X.Gu, A.Saito, M.Tsugaki and T.Yamashita
    • Journal Title

      Discrete Math.

      Volume: 343 Issue: 2 Pages: 111663-111663

    • DOI

      10.1016/j.disc.2019.111663

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Codes with the rank metric and matroids2019

    • Author(s)
      Keisuke Shiromoto
    • Journal Title

      Designs, Codes and Cryptography

      Volume: 87 Issue: 8 Pages: 1765-1776

    • DOI

      10.1007/s10623-018-0576-0

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] On 2-factors with a specified number of components in line graphs2019

    • Author(s)
      Shuya Chiba, Yoshimi Egawa, Jun Fujisawa, Akira Saito, Ingo Schiermeyer, Masao Tsugaki, Tomoki Yamashita
    • Journal Title

      Acta Mathematica Universitatis Comenianae

      Volume: 88 Pages: 541-546

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] A degree sum condition on the order, the connectivity and the independence number for Hamiltonicity2019

    • Author(s)
      Shuya Chiba, Michitaka Furuya, Kenta Ozeki, Masao Tsugaki, Tomoki Yamashita
    • Journal Title

      Electronic Journal of Combinatorics

      Volume: 26

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] On Critical Exponents of Dowling Matroids2018

    • Author(s)
      Y. Koga, T. Maruta, K. Shiromoto
    • Journal Title

      Designs, Codes and Cryptography

      Volume: 86 Issue: 9 Pages: 1947-1962

    • DOI

      10.1007/s10623-017-0431-8

    • NAID

      120006724788

    • Related Report
      2018 Research-status Report 2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] On degree sum conditions for 2-factors with a prescribed number of cycles2018

    • Author(s)
      Shuya Chiba
    • Journal Title

      Discrete Mathematics

      Volume: 341 Issue: 10 Pages: 2912-2918

    • DOI

      10.1016/j.disc.2018.06.045

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] Degree Conditions for the Existence of Vertex-Disjoint Cycles and Paths: A Survey2018

    • Author(s)
      Chiba Shuya、Yamashita Tomoki
    • Journal Title

      Graphs Combin.

      Volume: 34 Issue: 1 Pages: 1-83

    • DOI

      10.1007/s00373-017-1873-5

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] On directed 2-factors in digraphs and 2-factors containing perfect matchings in bipartite graphs2018

    • Author(s)
      Chiba Shuya、Yamashita Tomoki
    • Journal Title

      SIAM J.Discrete Math.

      Volume: 32 Issue: 1 Pages: 394-409

    • DOI

      10.1137/16m1108959

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] On dominating even subgraphs in cubic graphs2017

    • Author(s)
      Roman Cada, Shuya Chiba, Kenta Ozeki, Kiyoshi Yoshimoto
    • Journal Title

      SIAM Journal on Discrete Mathematics

      Volume: 31 Issue: 2 Pages: 890-907

    • DOI

      10.1137/16m1066622

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 指定した成分数の2-因子と次数和条件2017

    • Author(s)
      千葉 周也
    • Journal Title

      日本数学会2017年度秋季総合分科会応用数学分科会講演アブストラクト

      Volume: - Pages: 31-40

    • Related Report
      2017 Research-status Report
  • [Presentation] Generalized Weight Enumerators of Rank-Metric Codes and Matroids2019

    • Author(s)
      近藤 隼史
    • Organizer
      42nd Australasian Conference on Combinatorial Mathematics and Combinatorial Computing
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Critical problem forces over Z_{p^e}2019

    • Author(s)
      今村 浩二
    • Organizer
      42nd Australasian Conference on Combinatorial Mathematics and Combinatorial Computing
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Generalized Weights of Rank-Metric Codes and Matroids2019

    • Author(s)
      近藤 隼史
    • Organizer
      Japanese Conference on Combinatorics and its Applications
    • Related Report
      2019 Annual Research Report
  • [Presentation] Critical Problem for Codes over Finite Rings2019

    • Author(s)
      今村 浩二
    • Organizer
      Japanese Conference on Combinatorics and its Applications
    • Related Report
      2019 Annual Research Report
  • [Presentation] The Critical Problem for Binary Matroids2019

    • Author(s)
      城本 啓介
    • Organizer
      27th British Combinatorial Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] On 2-factors with a specified number of components in line graphs2019

    • Author(s)
      千葉 周也
    • Organizer
      European Conference on Combinatorics, Graph Theory and Applications
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The existence of a 2-factor with a specified number of components in a line graph2019

    • Author(s)
      千葉 周也, 山下 登茂紀
    • Organizer
      Japan-Mongolia Joint Workshop on Pure and Applied Mathematics
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical Problem for Binary Matroids2019

    • Author(s)
      Keisuke Shiromoto
    • Organizer
      The 17th Japan-Korea Workshop on Algebra and Combinatorics
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Critical Problem for Binary Matroids2019

    • Author(s)
      城本 啓介
    • Organizer
      研究集会「組合せ論的符号理論」
    • Related Report
      2018 Research-status Report
  • [Presentation] Critical Problem for Binary Matroids2018

    • Author(s)
      Keisuke Shiromoto
    • Organizer
      Monash Univ. Discrete Maths Research Group Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Codes with Rank Metric and Matroids2018

    • Author(s)
      Keisuke Shiromoto
    • Organizer
      The Japanese Conference on Combinatorics and its Applications (JCCA 2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Critical Problem for Binary Matroids2018

    • Author(s)
      Keisuke Shiromoto
    • Organizer
      41st Australasian Conference on Combinatorial Mathematics and Combinatorial Computing
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Degree conditions for partitioning graphs into chorded cycles2018

    • Author(s)
      Shuya Chiba
    • Organizer
      The Japanese Conference on Combinatorics and its Applications (JCCA 2018)
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Degree conditions for partitioning a graph into cycles with a specified number of chords2018

    • Author(s)
      Shuya Chiba, Suyun Jiang, Jin Yan
    • Organizer
      41st Australasian Conference on Combinatorial Mathematics and Combinatorial Computing
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 2-factors with a prescribed number of cycles in line graphs2018

    • Author(s)
      千葉 周也
    • Organizer
      2018年軽井沢グラフと解析研究集会II
    • Related Report
      2018 Research-status Report
  • [Presentation] Critical Problem for matroids and Codes2018

    • Author(s)
      Keisuke Shiromoto
    • Organizer
      Discrete Structures and Algorithms Seminar in University of Melbourne
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Matroids and Codes with Rank Metric2017

    • Author(s)
      Keisuke Shiromoto
    • Organizer
      5th International Combinatorics Conference (5ICC)
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Codes with Rank-Metric and Matroids2017

    • Author(s)
      城本 啓介
    • Organizer
      Japanese Conference on Combinatorics and its Applications (JCCA2017)・離散数学とその応用研究集会2017
    • Related Report
      2017 Research-status Report
  • [Presentation] On the Critical Problem for Matroids and Codes2017

    • Author(s)
      城本 啓介
    • Organizer
      愛媛大学数学科談話会/第45回代数セミナー
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 2-factors with a prescribed number of cycles in claw-free graphs2017

    • Author(s)
      Shuya Chiba
    • Organizer
      9th Workshop on the Matthews-Sumner Conjecture and Related Problems
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] On degree sum conditions for 2-factors with a prescribed number of cycles2017

    • Author(s)
      Shuya Chiba
    • Organizer
      5th International Combinatorics Conference (5ICC)
    • Related Report
      2017 Research-status Report
    • Invited
  • [Presentation] 指定した成分数の2-因子と次数和条件2017

    • Author(s)
      千葉 周也
    • Organizer
      日本数学会2017年度秋季総合分科会
    • Related Report
      2017 Research-status Report
    • Invited
  • [Remarks] 研究紹介ページ

    • URL

      https://www.fast.kumamoto-u.ac.jp/wp/wp-content/uploads/2018/04/keisuke_shiromoto.pdf

    • Related Report
      2019 Annual Research Report
  • [Remarks] 所属学科ホームページの研究紹介

    • URL

      https://www.fast.kumamoto-u.ac.jp/wp/wp-content/uploads/2018/04/keisuke_shiromoto.pdf

    • Related Report
      2018 Research-status Report

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Published: 2017-04-28   Modified: 2022-01-27  

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