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2008 Fiscal Year Final Research Report

Applications of algebraic methods in coding theory to combinatorial designs and discrete geometry

Research Project

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Project/Area Number 17340020
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field General mathematics (including Probability theory/Statistical mathematics)
Research InstitutionTohoku University

Principal Investigator

MUNEMASA Akihiro  Tohoku University, 大学院・情報科学研究科, 教授 (50219862)

Co-Investigator(Kenkyū-buntansha) HARADA Masaaki  山形大学, 理学部, 准教授 (90292408)
Co-Investigator(Renkei-kenkyūsha) TANIGUCHI Tetsuji  松江工業高等専門学校, 数理科学科, 助教 (90543728)
IMAI Hideo  東北大学, 大学院・情報科学研究科, 准教授 (10093668)
URAKAWA Hajime  東北大学, 大学院・情報科学研究科, 教授 (50022679)
ASOH Toru  東北大学, 大学院・情報科学研究科, 准教授 (00111352)
TAYA Hisao  宮城教育大学, 教育学部, 准教授 (40257241)
BETSUMIYA Koichi  弘前大学, 理工学部, 准教授 (60364684)
Project Period (FY) 2005 – 2008
Keywords応用数学 / 代数的組合せ論 / 符号理論 / 離散幾何 / 組合せデザイン理論 / 置換群論 / グラフ理論
Research Abstract

自己双対符号の性質を考察したこと、およびその中で特異なものを分類したことが主な成果である。特に、整数格子の分類結果を応用することにより、これまで分類することができなかった3元や5元自己双対符号についても分類方法を確立した。また、関連した組合せ論の研究として、有限体からできる強正則グラフとアソシエーションスキームの構成、組合せデザインの構成にも取り組んだ。

  • Research Products

    (20 results)

All 2009 2008 2007 2006 2005 Other

All Journal Article (10 results) (of which Peer Reviewed: 10 results) Presentation (9 results) Remarks (1 results)

  • [Journal Article] Classification of ternary extremal self-dual codes of length 282009

    • Author(s)
      M. Harada, A. Munemasa, B. Venkov
    • Journal Title

      Math.Comp. 78

      Pages: 1787-1796

    • Peer Reviewed
  • [Journal Article] There exists no self-dual[24,12,10]code over F5, Designs2009

    • Author(s)
      M. Harada, A. Munemasa
    • Journal Title

      Codes and Cryptography 12

      Pages: 125-127

    • Peer Reviewed
  • [Journal Article] On graphs with the smallest eigenvalue at least-1-square root 22008

    • Author(s)
      T. Taniguchi
    • Journal Title

      Ars Math. Contemp 1

      Pages: 81-98

    • Peer Reviewed
  • [Journal Article] Determination of weight enumerators of binary extremal self-dual[42,21,8]codes2008

    • Author(s)
      S. Bouyuklieva, M. Harada, A. Munemasa
    • Journal Title

      Finite Fields and Their Applications 14

      Pages: 177-187

    • Peer Reviewed
  • [Journal Article] A new example of non-amorphous association schemes2008

    • Author(s)
      T. Ikuta, A. Munemasa
    • Journal Title

      Contributions to Discrete Mathematics 3

      Pages: 31-36

    • Peer Reviewed
  • [Journal Article] On the covering radii of extremal doubly even self-dual codes2007

    • Author(s)
      M. Harada, A. Munemasa
    • Journal Title

      Adv.Math.Commun 1

      Pages: 251-256

    • Peer Reviewed
  • [Journal Article] Simple abelian quadruple systems2007

    • Author(s)
      A. Muneamsa, and M. Sawa
    • Journal Title

      J.Combin.Theory, Ser A 114

      Pages: 1160-1164

    • Peer Reviewed
  • [Journal Article] Some restrictions on weight enumerators of singly even self-dual codes2006

    • Author(s)
      M. Harada, A. Munemasa
    • Journal Title

      IEEE Trans. Inform. Theory 52

      Pages: 1266-1269

    • Peer Reviewed
  • [Journal Article] Hyperplane partitions and difference systems of sets2006

    • Author(s)
      R. Fuji-Hara, A. Munemasa, V. D. Tonchev
    • Journal Title

      J.Combin.Theory, Ser. A, 113

      Pages: 1689-1698

    • Peer Reviewed
  • [Journal Article] Mass formula for self-orthogonal codesover Z_p^2, Journal of Combinatorics

    • Author(s)
      R. A. L. Betty, A. Munemasa
    • Journal Title

      Information & System Sciences (掲載受理)

    • Peer Reviewed
  • [Presentation] On graphs whose smallest eigenvalue is at least-32008

    • Author(s)
      谷口哲至
    • Organizer
      Geometric and Algebraic Combinatorics 4
    • Place of Presentation
      Oisterwijk, オランダ王国
    • Year and Date
      2008-08-21
  • [Presentation] On some cyclotomic association schemes and strongly regular graphs2008

    • Author(s)
      宗政昭弘
    • Organizer
      Geometric and Algebraic Combinatorics 4
    • Place of Presentation
      Oisterwijk, オランダ王国
    • Year and Date
      2008-08-18
  • [Presentation] 長さ28のエクストリーマル3元自己双対符号の分類2007

    • Author(s)
      宗政昭弘
    • Organizer
      代数学と計算
    • Place of Presentation
      首都大学東京
    • Year and Date
      2007-12-05
  • [Presentation] On graphs with the smalleset eigenvelue at least-1-square root 22007

    • Author(s)
      谷口哲至
    • Organizer
      Sixth Slovenian International Conference on Graph Theory
    • Place of Presentation
      Bled, スロベニア
    • Year and Date
      2007-06-26
  • [Presentation] On Graphs with Complete Multipartite mu-Graphs2007

    • Author(s)
      宗政昭弘
    • Organizer
      Sixth Slovenian International Conference on Graph Theory
    • Place of Presentation
      Bled, スロベニア
    • Year and Date
      2007-06-25
  • [Presentation] On Graphs with Complete Multipartite mu-Graphs2007

    • Author(s)
      宗政昭弘
    • Organizer
      Korea-Japan Workshop on Algebra and Combinatorics
    • Place of Presentation
      釜山国立大学, 韓国
    • Year and Date
      2007-02-10
  • [Presentation] Combinatorial structures derived from extremal even unimodular lattices2006

    • Author(s)
      宗政昭弘
    • Organizer
      Algebra and Combinatorics
    • Place of Presentation
      Ateneo de Manila University, フィリピン共和国
    • Year and Date
      2006-04-01
  • [Presentation] Covering radii of extremal binary doubly even self-dual codes The Asian Symposium on Computer Mathematics 20052005

    • Author(s)
      宗政昭弘
    • Organizer
      Korean Institute of Advanced Study
    • Place of Presentation
      韓国
    • Year and Date
      2005-12-10
  • [Presentation] 組合せデザインとその周辺における数理的基礎およびそれらの応用2005

    • Author(s)
      宗政昭弘
    • Organizer
      An extremal problem related to binary singly even self-dual codes
    • Place of Presentation
      京都大学数理解析研究所
    • Year and Date
      2005-08-04
  • [Remarks]

    • URL

      http://www.math.is.tohoku.ac.jp/~munemasa/selfdualcodes.htm

URL: 

Published: 2010-06-10   Modified: 2016-04-21  

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