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Harada Masaaki  原田 昌晃

… Alternative Names

HARADA Masaaki  原田 昌晃

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Researcher Number 90292408
Other IDs
  • ORCIDhttps://orcid.org/0000-0002-2748-6456
Affiliation (Current) 2025: 東北大学, 情報科学研究科, 教授
Affiliation (based on the past Project Information) *help 2013 – 2024: 東北大学, 情報科学研究科, 教授
2017: 東北大学, 大学院情報科学研究科, 教授
2007 – 2012: Yamagata University, 理学部, 准教授
2001 – 2006: 山形大学, 理学部, 助教授
2003: 山形大学, 理学部, 教授
1997 – 2000: 山形大学, 理学部, 助手
Review Section/Research Field
Principal Investigator
General mathematics (including Probability theory/Statistical mathematics) / General mathematics (including Probability theory/Statistical mathematics) / Basic Section 12030:Basic mathematics-related / Foundations of mathematics/Applied mathematics / Sections That Are Subject to Joint Review: Basic Section12030:Basic mathematics-related , Basic Section12040:Applied mathematics and statistics-related / Basic Section 12040:Applied mathematics and statistics-related
Except Principal Investigator
Algebra / Algebra / Foundations of mathematics/Applied mathematics / General mathematics (including Probability theory/Statistical mathematics) / General mathematics (including Probability theory/Statistical mathematics) / 計算機科学
Keywords
Principal Investigator
自己双対符号 / 組合せデザイン / 格子 / 組合せ論 / 代数的符号理論 / デザイン / 符号理論 / 線形補双対符号 / アダマール行列 / LCD 符号 … More / 離散構造 / 離散数学 / 自己双対符 / 有限環 / 偶ユニモジュラ格子 / ユニモジュラ格子 / 線形符号 / 有限環上の符号 … More
Except Principal Investigator
格子 / 符号 / 有限群 / デザイン / 頂点作用素代数 / 散在型単純群 / 単純群 / グラフ / 有限体 / lattice / Code / 符号理論 / ジーゲル保型形式 / spherical design / アソシエーションスキーム / 保型形式 / Vertex Operator Algebra / Design / Lattice / Sporadic Simple Group / Simple Group / Finite Group / モンスター単純群 / 被覆半径 / 組合せデザイン / 自己双対符号 / 代数的符号理論 / 代数的組合せ論 / 3互換群 / 分類 / 互いに不偏なアダマール行列 / 自己直交符号 / 有限環 / 誤り訂正符号 / グラフ表現 / Siegel modular form / multiple weight enumerator / 二次形式 / 多重重み枚挙多項式 / Graph / Siegel modular forms / Jacobi form / Coding theory / ヤコビ形式 / modular form / design / code / Ramanujan graph / association scheme / algebraic combinatorics / tight designs / 指標表 / グラスマン空間 / tight design / kissing number / モジュラー形式 / 球面デザイン / コード / ラマンジャングラフ / アソシエーションスチーム / LATTICE / MODULAR FORM / SPIN MODEL / FINITE FIELD / DISTANCE-REGULAR GRAPH / SELF-DUAL CODE / ALGEBRAIC COMBINATORICS / モジュラー形成 / スピンモデル / 距離正則グラフ / 代数的符号 / Monster Simple Group / W代数 / モンスター純群 / Jacobi polynomials of codes / coset weight distributions / the covering radius / ternary codes / binary codes / 不変式環 / ヤコビ多項式 / コセット重み分布 / 3元符号 / 2元符号 / 群論 / ブルガリア : オランダ / 国際情報交換 / グラフ理論 / 置換群論 / 組合せデザイン理論 / 離散幾何 / 応用数学 / 自己同型群 / 量子符号 / GAP / 公開鍵暗号 / トラップドア(落し戸) / 対称暗号 / 暗号 Less
  • Research Projects

    (25 results)
  • Research Products

    (150 results)
  • Co-Researchers

    (55 People)
  •  Evolution of Combinatorial Coding TheoryPrincipal Investigator

    • Principal Investigator
      原田 昌晃
    • Project Period (FY)
      2023 – 2027
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Review Section
      Basic Section 12030:Basic mathematics-related
      Basic Section 12040:Applied mathematics and statistics-related
      Sections That Are Subject to Joint Review: Basic Section12030:Basic mathematics-related , Basic Section12040:Applied mathematics and statistics-related
    • Research Institution
      Tohoku University
  •  A synthetic study of algebraic coding theoryPrincipal Investigator

    • Principal Investigator
      Harada Masaaki
    • Project Period (FY)
      2019 – 2023
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Review Section
      Basic Section 12030:Basic mathematics-related
    • Research Institution
      Tohoku University
  •  Graph representations of combinatorial structures

    • Principal Investigator
      Araya Makoto
    • Project Period (FY)
      2015 – 2017
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Foundations of mathematics/Applied mathematics
    • Research Institution
      Shizuoka University
  •  Comprehensive research on algebraic coding theoryPrincipal Investigator

    • Principal Investigator
      Harada Masaaki
    • Project Period (FY)
      2015 – 2018
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Foundations of mathematics/Applied mathematics
    • Research Institution
      Tohoku University
  •  Challenging of the existence problem of a certain self-dual code through combinatorial designs and latticesPrincipal Investigator

    • Principal Investigator
      Harada Masaaki
    • Project Period (FY)
      2014 – 2015
    • Research Category
      Grant-in-Aid for Challenging Exploratory Research
    • Research Field
      Foundations of mathematics/Applied mathematics
    • Research Institution
      Tohoku University
  •  Various aspects of sporadic simple groups

    • Principal Investigator
      KITAZUME MASAAKI
    • Project Period (FY)
      2012 – 2017
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Algebra
    • Research Institution
      Chiba University
  •  A New Development of Algebraic Coding TheoryPrincipal Investigator

    • Principal Investigator
      HARADA Masaaki
    • Project Period (FY)
      2011 – 2014
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Tohoku University
      Yamagata University
  •  Challenging to construction of an extremal doubly even self-dual code of length 72Principal Investigator

    • Principal Investigator
      HARADA Masaaki
    • Project Period (FY)
      2011 – 2012
    • Research Category
      Grant-in-Aid for Challenging Exploratory Research
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Yamagata University
  •  Algebraic coding theory and combinatorial designsPrincipal Investigator

    • Principal Investigator
      HARADA Masaaki
    • Project Period (FY)
      2008 – 2010
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Yamagata University
  •  Study on algebraic or combinatorial structures whose automorphism groups contain finite simple groups

    • Principal Investigator
      KITAZUME Masaaki
    • Project Period (FY)
      2007 – 2010
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Algebra
    • Research Institution
      Chiba University
  •  Research on algebraic coding theory and its applications for vertex operator algebras

    • Principal Investigator
      BETSUMIYA Koichi
    • Project Period (FY)
      2007 – 2010
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Algebra
    • Research Institution
      Jobu University
  •  Applications of algebraic methods in coding theory to combinatorial designs and discrete geometry

    • Principal Investigator
      MUNEMASA Akihiro
    • Project Period (FY)
      2005 – 2008
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Tohoku University
  •  代数的符号理論と組合せデザインの研究Principal Investigator

    • Principal Investigator
      原田 昌晃
    • Project Period (FY)
      2005 – 2007
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Yamagata University
  •  Coding theory, the invariant theory for the finite fractional linear transformation groups and their applications to the number theory

    • Principal Investigator
      OZEKI Michio
    • Project Period (FY)
      2005 – 2006
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Algebra
    • Research Institution
      Yamagata University
  •  Finite Simple Groups and Related Codes, Lattices and Vertex Operator Algebras

    • Principal Investigator
      KITAZUME Masaaki
    • Project Period (FY)
      2003 – 2006
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Algebra
    • Research Institution
      Chiba University
  •  誤り訂正量子符号の有限群論的アプローチ

    • Principal Investigator
      KITAZUME Masaaki
    • Project Period (FY)
      2002 – 2004
    • Research Category
      Grant-in-Aid for Exploratory Research
    • Research Field
      Algebra
    • Research Institution
      Chiba University
  •  代数的符号理論と格子、組合せデザイン、および量子符号への応用Principal Investigator

    • Principal Investigator
      原田 昌晃
    • Project Period (FY)
      2002 – 2004
    • Research Category
      Grant-in-Aid for Young Scientists (B)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Yamagata University
  •  A study of the interacting area among the theory of quadratic forms and the theory of modular forms and the algebraic coding theory

    • Principal Investigator
      OZEKI Michio
    • Project Period (FY)
      2002 – 2004
    • Research Category
      Grant-in-Aid for Scientific Research (C)
    • Research Field
      Algebra
    • Research Institution
      Yamagata University
  •  Comprehensive study on Algebraic Combinatorics

    • Principal Investigator
      BANNAI Eiichi
    • Project Period (FY)
      2001 – 2003
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Algebra
    • Research Institution
      Kyushu University
  •  有限環上の代数的符号理論と格子および組合せデザインとの関係についてPrincipal Investigator

    • Principal Investigator
      原田 昌晃
    • Project Period (FY)
      2000 – 2001
    • Research Category
      Grant-in-Aid for Encouragement of Young Scientists (A)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Yamagata University
  •  Finite Simple Groups and Related Codes, Lattices and Vertex Operator Algebras

    • Principal Investigator
      KITAZUME Masaaki
    • Project Period (FY)
      2000 – 2002
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      Algebra
    • Research Institution
      Chiba University
  •  ALGEBRAIC CODING THEORY, COMBINATORIAL DESIGNS AND ASSOCIATION SCHEMES

    • Principal Investigator
      MUNEMASA Akihiro
    • Project Period (FY)
      2000 – 2003
    • Research Category
      Grant-in-Aid for Scientific Research (B)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      TOHOKU UNIVERSITY
      Kyushu University
  •  代数的符号理論とユニモジュラ格子の研究Principal Investigator

    • Principal Investigator
      原田 昌晃
    • Project Period (FY)
      1998 – 1999
    • Research Category
      Grant-in-Aid for Encouragement of Young Scientists (A)
    • Research Field
      General mathematics (including Probability theory/Statistical mathematics)
    • Research Institution
      Yamagata University
  •  暗号系に現れる群構造について

    • Principal Investigator
      SAWADA Hideki
    • Project Period (FY)
      1998 – 2000
    • Research Category
      Grant-in-Aid for Exploratory Research
    • Research Field
      計算機科学
    • Research Institution
      Yamagata University
  •  Algebraic Coding Theory and the related studies of algebraic, geometric and analytic natures

    • Principal Investigator
      OZEKI Michio
    • Project Period (FY)
      1997 – 2000
    • Research Category
      Grant-in-Aid for Scientific Research (B).
    • Research Field
      Algebra
    • Research Institution
      Faculty of Science, Yamagata University

All 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 Other

All Journal Article Presentation

  • [Journal Article] Hadamard Matrices of Orders 60 and 64 with Automorphisms of Orders 29 and 312024

    • Author(s)
      Makoto Araya、Harada Masaaki、Vladimir Tonchev
    • Journal Title

      The Electronic Journal of Combinatorics

      Volume: 31 Issue: 1

    • DOI

      10.37236/12249

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-21K03350, KAKENHI-PROJECT-23K25784
  • [Journal Article] Hadamard matrices of order 36 formed by codewords in some ternary self-dual codes2024

    • Author(s)
      Harada Masaaki、Ishizuka Keita
    • Journal Title

      Discrete Mathematics

      Volume: 347 Issue: 1 Pages: 113661-113661

    • DOI

      10.1016/j.disc.2023.113661

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23K25784
  • [Journal Article] Construction of extremal Type II Zk-codes2023

    • Author(s)
      Harada Masaaki
    • Journal Title

      Finite Fields and Their Applications

      Volume: 87 Pages: 102154-102154

    • DOI

      10.1016/j.ffa.2022.102154

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] Some restrictions on the weight enumerators of near-extremal ternary self-dual codes and quaternary Hermitian self-dual codes2023

    • Author(s)
      Araya Makoto、Harada Masaaki
    • Journal Title

      Designs, Codes and Cryptography

      Volume: -

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] Self-dual codes over F5 and s-extremal unimodular lattices2023

    • Author(s)
      Harada Masaaki
    • Journal Title

      Discrete Mathematics

      Volume: 346 Issue: 1 Pages: 113126-113126

    • DOI

      10.1016/j.disc.2022.113126

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] Hadamard matrices related to a certain series of ternary self-dual codes2023

    • Author(s)
      M. Araya, M. Harada, K. Momihara
    • Journal Title

      Designs, Codes and Cryptography

      Volume: 91 Issue: 3 Pages: 795-805

    • DOI

      10.1007/s10623-022-01127-y

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20K03719, KAKENHI-PROJECT-21K03350, KAKENHI-PROJECT-19H01802, KAKENHI-PROJECT-23K20225
  • [Journal Article] Improved lower bounds for self-dual codes over F11, F13, F17, F19 and F232023

    • Author(s)
      Gulliver T. Aaron、Harada Masaaki
    • Journal Title

      Advances in Mathematics of Communications

      Volume: -

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] Some restrictions on the weight enumerators of near-extremal ternary self-dual codes and quaternary Hermitian self-dual codes2023

    • Author(s)
      Araya Makoto、Harada Masaaki
    • Journal Title

      Designs, Codes and Cryptography

      Volume: 91 Issue: 5 Pages: 1813-1843

    • DOI

      10.1007/s10623-022-01172-7

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-21K03350, KAKENHI-PROJECT-23K25784
  • [Journal Article] On the classification of quaternary optimal Hermitian LCD codes2022

    • Author(s)
      Araya Makoto、Harada Masaaki
    • Journal Title

      Cryptography and Communications

      Volume: 14 Issue: 4 Pages: 833-847

    • DOI

      10.1007/s12095-021-00552-5

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] On the classification of quaternary optimal Hermitian LCD codes2022

    • Author(s)
      Makoto Araya and Masaaki Harada
    • Journal Title

      Cryptography and Communications

      Volume: -

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] Construction of binary LCD codes, ternary LCD codes and quaternary Hermitian LCD codes2021

    • Author(s)
      Harada Masaaki
    • Journal Title

      Designs, Codes and Cryptography

      Volume: 89 Issue: 10 Pages: 2295-2312

    • DOI

      10.1007/s10623-021-00916-1

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] Characterization and classification of optimal LCD codes2021

    • Author(s)
      Araya Makoto、Harada Masaaki、Saito Ken
    • Journal Title

      Designs, Codes and Cryptography

      Volume: 89 Issue: 4 Pages: 617-640

    • DOI

      10.1007/s10623-020-00834-8

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] On the minimum weights of binary LCD codes and ternary LCD codes2021

    • Author(s)
      Araya Makoto、Harada Masaaki、Saito Ken
    • Journal Title

      Finite Fields and Their Applications

      Volume: 76 Pages: 101925-101925

    • DOI

      10.1016/j.ffa.2021.101925

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] Quaternary Hermitian Linear Complementary Dual Codes2020

    • Author(s)
      Araya Makoto、Harada Masaaki、Saito Ken
    • Journal Title

      IEEE Transactions on Information Theory

      Volume: 66 Issue: 5 Pages: 2751-2759

    • DOI

      10.1109/tit.2019.2949040

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] Remark on subcodes of linear complementary dual codes2020

    • Author(s)
      Harada Masaaki、Saito Ken
    • Journal Title

      Information Processing Letters

      Volume: 159-160 Pages: 105963-105963

    • DOI

      10.1016/j.ipl.2020.105963

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] On the minimum weights of binary linear complementary dual codes2020

    • Author(s)
      Makoto Araya and Masaaki Harada
    • Journal Title

      Cryptography and Communications

      Volume: 12 Issue: 2 Pages: 285-300

    • DOI

      10.1007/s12095-019-00402-5

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] Construction of s-extremal optimal unimodular lattices in dimension 522020

    • Author(s)
      Harada Masaaki
    • Journal Title

      International Journal of Computer Mathematics: Computer Systems Theory

      Volume: 5 Issue: 2 Pages: 87-91

    • DOI

      10.1080/23799927.2020.1755367

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] On the existence of s-extremal singly even self-dual codes2020

    • Author(s)
      Harada Masaaki
    • Journal Title

      Discrete Mathematics, Algorithms and Applications

      Volume: 13 Issue: 02 Pages: 2150014-2150014

    • DOI

      10.1142/s1793830921500142

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] New doubly even self-dual codes having minimum weight 202020

    • Author(s)
      Masaaki Harada
    • Journal Title

      Advances Math. Communications

      Volume: 14 Issue: 1 Pages: 89-96

    • DOI

      10.3934/amc.2020007

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] On extremal double circulant self-dual codes of lengths 90-962019

    • Author(s)
      T. Aaron Gulliver and Masaaki Harada
    • Journal Title

      Applicable Algebra in Eng. Communi. Comput.

      Volume: 印刷中

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Some optimal entanglement-assisted quantum codes constructed from quaternary Hermitian linear complementary dual codes2019

    • Author(s)
      Masaaki Harada
    • Journal Title

      International Journal of Quantum Information

      Volume: 17 Issue: 07 Pages: 1950053-1950053

    • DOI

      10.1142/s0219749919500539

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] On extremal double circulant self-dual codes of lengths 90-962019

    • Author(s)
      T. Aaron Gulliver and Masaaki Harada
    • Journal Title

      Applicable Algebra in Eng. Communi. Comput.

      Volume: 30 Issue: 5 Pages: 403-415

    • DOI

      10.1007/s00200-019-00381-3

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-19H01802
  • [Journal Article] New doubly even self-dual codes having minimum weight 202019

    • Author(s)
      Masaaki Harada
    • Journal Title

      Advances Math. Communications

      Volume: 印刷中

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Binary linear complementary dual codes2019

    • Author(s)
      Masaaki Harada and Ken Saito
    • Journal Title

      Cryptography and Communications

      Volume: 印刷中

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] On the classification of linear complementary dual codes2019

    • Author(s)
      Makoto Araya and Masaaki Harada
    • Journal Title

      Discrete Math.

      Volume: 342 Issue: 1 Pages: 270-278

    • DOI

      10.1016/j.disc.2018.09.034

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] New extremal singly even self-dual codes of lengths 64 and 662018

    • Author(s)
      Damyan Anev, Masaaki Harada and Nikolay Yankov
    • Journal Title

      J. Algebra Comb. Discrete Struct. Appl.

      Volume: 5 Issue: 3 Pages: 143-151

    • DOI

      10.13069/jacodesmath.458601

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Nonexistence of certain singly even self-dual codes with minimal shadow2018

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

      Electronic J. Combin.

      Volume: 25

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Singly even self-dual codes of length 24k+10 and minimum weight 4k+22018

    • Author(s)
      M. Harada
    • Journal Title

      Cryptography and Communications

      Volume: 印刷中

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Some restrictions on weight enumerators of singly even self-dual codes II2018

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

      Interdiscip. Inform. Sci.

      Volume: 印刷中

    • NAID

      130007412755

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Ternary maximal self-orthogonal codes of lengths $21,22$ and $23$2018

    • Author(s)
      Araya Makoto、Harada Masaaki、Suzuki Yuichi
    • Journal Title

      J. Algebra Comb. Discrete Struct. Appl.

      Volume: 5 Pages: 1-4

    • DOI

      10.13069/jacodesmath.327391

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633, KAKENHI-PROJECT-15K04976
  • [Journal Article] Binary extremal self-dual codes of length 60 and related codes2018

    • Author(s)
      Harada Masaaki
    • Journal Title

      Designs, Codes and Cryptogr.

      Volume: 86 Issue: 5 Pages: 1085-1094

    • DOI

      10.1007/s10623-017-0380-2

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Some Restrictions on Weight Enumerators of Singly Even Self-Dual Codes II2018

    • Author(s)
      Masaaki Harada and Akihiro Munemasa
    • Journal Title

      IIS

      Volume: 24 Issue: 1 Pages: 77-85

    • DOI

      10.4036/iis.2017.R.03

    • NAID

      130007412755

    • ISSN
      1340-9050, 1347-6157
    • Language
      English
    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Singly even self-dual codes constructed from Hadamard matrices of order 282018

    • Author(s)
      M. Harada and K. Saito
    • Journal Title

      Australasian J. Combin.

      Volume: 70 Pages: 288-296

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] New quantum codes constructed from some self-dual additive F4-codes2018

    • Author(s)
      Masaaki Harada
    • Journal Title

      Information Processing Letters

      Volume: 138 Pages: 35-38

    • DOI

      10.1016/j.ipl.2018.05.008

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] On the classification of Z4-codes2017

    • Author(s)
      Araya Makoto、Harada Masaaki、Ito Hiroki、Saito Ken
    • Journal Title

      Advances Math. Communications

      Volume: 11 Issue: 4 Pages: 747-756

    • DOI

      10.3934/amc.2017054

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633, KAKENHI-PROJECT-15K04976
  • [Journal Article] On the performance of optimal double circulant even codes2017

    • Author(s)
      Gulliver T. Aaron、Harada Masaaki
    • Journal Title

      Advances Math. Communications

      Volume: 11 Issue: 4 Pages: 767-775

    • DOI

      10.3934/amc.2017056

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Performance of ternary double circulant, double twistulant, and self-dual codes2017

    • Author(s)
      Gulliver T. Aaron、Harada Masaaki
    • Journal Title

      Applicable Algebra in Eng. Communi. Comput.

      Volume: 28 Issue: 5 Pages: 409-424

    • DOI

      10.1007/s00200-017-0312-4

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Extremal Type II Z4-codes constructed from binary doubly even self-dual codes of length 402017

    • Author(s)
      Harada Masaaki
    • Journal Title

      Discrete Math

      Volume: 340 Issue: 10 Pages: 2466-2468

    • DOI

      10.1016/j.disc.2017.06.009

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Self-Dual Codes and the Nonexistence of a Quasi-Symmetric 2-(37,9,8) Design with Intersection Numbers 1 and 32017

    • Author(s)
      Harada Masaaki、Munemasa Akihiro、Tonchev Vladimir D.
    • Journal Title

      J. Combin. Designs

      Volume: 25 Issue: 10 Pages: 469-476

    • DOI

      10.1002/jcd.21556

    • Peer Reviewed / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] New self-dual additive F4-codes constructed from circulant graphs2017

    • Author(s)
      Masaaki Harada and Markus Grassl
    • Journal Title

      Discrete Math.

      Volume: 340 Issue: 3 Pages: 399-403

    • DOI

      10.1016/j.disc.2016.08.023

    • Peer Reviewed / Acknowledgement Compliant / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] On s -extremal singly even self-dual [24 k + 8,12 k + 4,4 k + 2] codes2017

    • Author(s)
      Harada Masaaki、Munemasa Akihiro
    • Journal Title

      Finite Fields and Their Applications

      Volume: 48 Pages: 306-317

    • DOI

      10.1016/j.ffa.2017.08.008

    • Peer Reviewed / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Quasi-unbiased Hadamard matrices and weakly unbiased Hadamard matrices: a coding-theoretic approach2016

    • Author(s)
      Makoto Araya, Masaaki Harada and Sho Suda
    • Journal Title

      Mathematics of Computation

      Volume: 印刷中

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-26610032
  • [Journal Article] Supplementary difference sets related to a certain class of complex spherical 2-codes2016

    • Author(s)
      Makoto Araya, Masaaki Harada and Sho Suda
    • Journal Title

      Australasian J. Combin.

      Volume: 65 Pages: 71-83

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-26610032
  • [Journal Article] The weight distribution of the self-dual [128,64] polarity design code2016

    • Author(s)
      Masaaki Harada, Ethan Novak and Vladimir D. Tonchev
    • Journal Title

      Advances Math. Communications

      Volume: 42 Issue: 3 Pages: 57-66

    • DOI

      10.3934/amc.2016032

    • Peer Reviewed / Acknowledgement Compliant / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] The weight distribution of the self-dual [128, 64] polarity design code2016

    • Author(s)
      Masaaki Harada, Ethan Novak and Vladimir D. Tonchev
    • Journal Title

      Advances Math. Communications

      Volume: -

    • Peer Reviewed / Acknowledgement Compliant / Open Access / Int'l Joint Research
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Quasi-unbiased Hadamard matrices and weakly unbiased Hadamard matrices: A coding-theoretic approach2016

    • Author(s)
      M.Araya, M.Harada and S.Suda
    • Journal Title

      Mathematics of Computation

      Volume: 86/304 Issue: 304 Pages: 951-984

    • DOI

      10.1090/mcom/3122

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-15K04976
  • [Journal Article] Supplementary difference sets related to a certain class of complex spherical 2-codes2016

    • Author(s)
      Makoto Araya、Masaaki Harada and Sho Suda
    • Journal Title

      Australasian J. Combin.

      Volume: 65 Pages: 71-83

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Journal Article] Supplementary difference sets related to a certain class of complex spherical 2-codes2016

    • Author(s)
      M.Araya, M.Harada and S.Suda
    • Journal Title

      The Australasian Journal of Combinatorics

      Volume: 65 Pages: 71-83

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-15K04976
  • [Journal Article] On the classification of self-dual Zk-codes II2016

    • Author(s)
      Masaaki Harada and Akihiro Munemasa
    • Journal Title

      Interdiscip. Inform. Sci.

      Volume: 印刷中

    • NAID

      130005281142

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-26610032
  • [Journal Article] On a 5-design related to a putative extremal doubly even self-dual code of length a multiple of 242015

    • Author(s)
      Masaaki Harada
    • Journal Title

      Designs, Codes and Cryptogr

      Volume: 印刷中 Issue: 3 Pages: 373-384

    • DOI

      10.1007/s10623-014-9963-3

    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] Extremal Type I Zk-codes and k-frames of odd unimodular lattices2015

    • Author(s)
      Masaaki Harada
    • Journal Title

      IEEE Trans. Inform. Theory

      Volume: 61 Issue: 1 Pages: 72-81

    • DOI

      10.1109/tit.2014.2368563

    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] On the existence of extremal Type II Z2k-codes2014

    • Author(s)
      Masaaki Harada and Tsuyoshi Miezaki
    • Journal Title

      Mathematics of Computation

      Volume: 83 Pages: 1427-1446

    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] On the classification of extremal doubly even self-dual codes with 2-transitive automorphism groups2014

    • Author(s)
      Naoki Chigira, Masaaki Harada and Masaaki Kitazume
    • Journal Title

      Designs, Codes and Cryptogr.

      Volume: 73 Issue: 1 Pages: 33-35

    • DOI

      10.1007/s10623-013-9807-6

    • Peer Reviewed / Acknowledgement Compliant
    • Data Source
      KAKENHI-PROJECT-23340021, KAKENHI-PROJECT-24340002, KAKENHI-PROJECT-24540024
  • [Journal Article] Extremal unimodular lattices in dimension 362014

    • Author(s)
      Masaaki Harada
    • Journal Title

      International J. Combin.

      Volume: 2014 Pages: 1-7

    • DOI

      10.1155/2014/792471

    • Peer Reviewed / Acknowledgement Compliant / Open Access
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] On the existence of extremal Type II Z2k-codes2013

    • Author(s)
      M. Harada, T. Miezaki
    • Journal Title

      Mathematics of Computation

      Volume: 未定

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] On the existence of extremal Type II Z2k-codes2013

    • Author(s)
      M. Harada, T. Miezaki
    • Journal Title

      Mathematics of Computation (掲載決定)

      Volume: 未定

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23654029
  • [Journal Article] Residue codes of extremal Type II Z4-codes and the moonshine vertex operator algebra2013

    • Author(s)
      Masaaki Harada, Ching Hung Lam and Akihiro Munemasa
    • Journal Title

      Math. Zeitschrift

      Volume: 274 Issue: 1-2 Pages: 685-700

    • DOI

      10.1007/s00209-012-1091-z

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] Some extremal self-dual codes and unimodular lattices in dimension 402013

    • Author(s)
      S. Bouyuklieva, I. Bouyukliev, M. Harada
    • Journal Title

      Finite Fields and Their Applications

      Volume: 21 Pages: 67-83

    • DOI

      10.1016/j.ffa.2013.01.009

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] There is no [21, 5, 14] code over F52013

    • Author(s)
      Makoto Araya, Masaaki Harada
    • Journal Title

      Discrete Math

      Volume: 313 Issue: 24 Pages: 2872-2874

    • DOI

      10.1016/j.disc.2013.08.027

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] Classification of self-dual codes of length 362012

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

      Advances Math. Communications

      Volume: 6 Issue: 2 Pages: 229-235

    • DOI

      10.3934/amc.2012.6.229

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] Hadamard matrices of order 32 and extremal ternary self-dual codes2011

    • Author(s)
      Koichi Betsumiya, Masaaki Harada, Hiroshi Kimura
    • Journal Title

      Designs, Codes and Cryptography

      Volume: 59 Pages: 203-214

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19540048
  • [Journal Article] Hadamard matrices of order 32 and extremal ternary self-dual codes2011

    • Author(s)
      別宮耕一・原田昌晃・木村浩
    • Journal Title

      Designs, Codes and Cryptography 58

      Pages: 203-214

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19540048
  • [Journal Article] An Optimal Odd Unimodular Lattice in Dimension 722011

    • Author(s)
      Masaaki Harada ,Tsuyoshi Miezaki
    • Journal Title

      Arch. Math. (Basel)97

      Volume: no.6 Issue: 6 Pages: 529-533

    • DOI

      10.1007/s00013-011-0333-3

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-22840003, KAKENHI-PROJECT-23654029
  • [Journal Article] Classification of generalized Hadamard matrices H(6, 3) and quaternary Hermitian self-dual codes of length 182010

    • Author(s)
      M.Harada, C.Lam, A.Munemasa, V.D.Tonchev
    • Journal Title

      Electronic J.Combin. 17

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] Extremal Type II Z 4-codes of lengths 56 and 642010

    • Author(s)
      M.Harada
    • Journal Title

      J.Combin.Theory Ser.A

      Volume: 117 Pages: 1285-1288

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] Extremal Type II Z_4-codes of lengths 56 and 642010

    • Author(s)
      M.Harada
    • Journal Title

      J.Combin.Theory Ser.A 117

      Pages: 1285-1288

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] An upper bound on the minimum weight of Type II Z 2k-codes2010

    • Author(s)
      M.Harada
    • Journal Title

      J.Combin.Theory Ser.A

      Volume: 118 Pages: 190-196

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] An upper bound on the minimum weight of Type II Z_<2k>-codes2010

    • Author(s)
      M.Harada, T.Miezaki
    • Journal Title

      J.Combin.Theory Ser.A 118

      Pages: 190-196

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [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
    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] On the existence of frames of the Niemeier lattices and self-dual codes over Fp2009

    • Author(s)
      M.Harada
    • Journal Title

      J.Algebra 321

      Pages: 2345-2352

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] On the classification of self-dual Zk-codes2009

    • Author(s)
      M.Harada
    • Journal Title

      Lecture Notes in Comput.Sci. 5921

      Pages: 78-90

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] A complete classification of ternary self-dual codes of length 242009

    • Author(s)
      M.Harada
    • Journal Title

      J.Combin.Theory Ser.A 116

      Pages: 1063-1072

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [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
    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] A complete classification of ternary self-dual codes of length 242009

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

      J.Combin.Theory Ser.A 116

      Pages: 1063-1072

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] There exists no self-dual [24, 12, 10] code over F52009

    • Author(s)
      M. Harada
    • Journal Title

      Designs, Codes and Cryptogr 52

      Pages: 125-127

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] Classification of ternary extremal self-dual codes of length 282009

    • Author(s)
      M.Harada
    • Journal Title

      Mathematics of Computation 78

      Pages: 1787-1796

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] On the existence of frames of the Niemeier lattices and self-dual codes over Fp2009

    • Author(s)
      M. Harada
    • Journal Title

      J. Algebra 321

      Pages: 2345-2352

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] There exists no self-dual [24, 12, 10] code over F52009

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

      Designs, Codes and Cryptography 12

      Pages: 125-127

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] On the classification of self-dual Z_k-codes2009

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

      Lecture Notes Comput.Sci. 5921

      Pages: 78-90

    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] There exists no self-dual [24, 12, 10] code over F_52009

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

      Designs, Codes and Cryptogr. 52

      Pages: 125-127

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] Classification of ternary extremal self-dual codes of length 282009

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

      Mathematics of Comput. 78

      Pages: 1787-1796

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] An extremal doubly even self-dual code of length 1122008

    • Author(s)
      M. Harada
    • Journal Title

      Electronic J. Combin 15(Electronic)

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] On double circulant doubly even self-dual [72,86,12]codes and their neighbors.2008

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

      Australasian Journal of Combinatorics 40

      Pages: 137-144

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19540048
  • [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
    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] Determination of weight enumerators of binary extremal self-dual[42,21,8]codes.2007

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

      Finite Fields and Their Applications 14

      Pages: 177-187

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19540048
  • [Journal Article] Some Self-Dual Codes Invariant under the Hall-Janko Group2007

    • Author(s)
      N.Chigira, M.Kitazume, M.Harada
    • Journal Title

      Journal of Algebra 316

      Pages: 578-590

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19340002
  • [Journal Article] Some Self-Dual Codes Invariant under the Hall-Janko Group2007

    • Author(s)
      N. Chigira, M. Harada, M. Kitazume
    • Journal Title

      Journal of Algebra 316

      Pages: 578-590

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19340002
  • [Journal Article] Extremal Self-Dual Codes of Length 64 through Neighbors and Covering Radii2007

    • Author(s)
      N.Chigira, M.Harada, M.Kitazume
    • Journal Title

      Designs, Codes and Cryptography 42

      Pages: 93-101

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-15340002
  • [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

    • NAID

      120003728106

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] Extremal Self-Dual Codes of Length 64 through Neighbors and Covering Radii2007

    • Author(s)
      N.Chigira, M.Harada, M.hitazume
    • Journal Title

      Designs, Codes and Cryptography 42

      Pages: 93-101

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-15340002
  • [Journal Article] Finite permutation groups and self-orthogonal codes2007

    • Author(s)
      N.Chigira, M.Harada, M.Kitazume
    • Journal Title

      Journal of Algebra 309

      Pages: 610-621

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-15340002
  • [Journal Article] On the covering radii of extremal double even self-dual codes2007

    • Author(s)
      M, Harada
    • Journal Title

      Advances Math. Communications 1

      Pages: 251-256

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17740045
  • [Journal Article] On the covering radii of extremal doubly even self-dual codes2007

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

      Adv. Math. Commun. 1

      Pages: 251-256

    • NAID

      120003728106

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] Classification of extremal double circulant self-dual codes of lengths 74-882006

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

      Discrete Mathematics 306

      Pages: 2064-2072

    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] Orthogonal designs and MDS self-dual codes2006

    • Author(s)
      M.Harada, H.Kharaghani
    • Journal Title

      Australasian Journal of Combinatorics 35

      Pages: 57-67

    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] Self-orthogonal 3-(56,12,65) designs and extremal doubly-even self-dual codes of length 562006

    • Author(s)
      M.Harada
    • Journal Title

      Designs, Codes and Cryptography 38

      Pages: 5-16

    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] Orthogonal designs and MDS self-dual codes2006

    • Author(s)
      M.Harada
    • Journal Title

      Australasian J.Combin. 32

      Pages: 57-67

    • Data Source
      KAKENHI-PROJECT-17740045
  • [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

    • NAID

      120002337725

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-17340020
  • [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

    • NAID

      120002337725

    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] A characterization of designs related to an extremal doubly-even self-dual code of length 482005

    • Author(s)
      M.Harada
    • Journal Title

      Ann.Combin. 9

      Pages: 189-198

    • Data Source
      KAKENHI-PROJECT-17740045
  • [Journal Article] On the complete coset weight distributionof the extremal self-dual[46,23,10] code.2005

    • Author(s)
      H.Harada, T.Nishimura
    • Journal Title

      IEEE Transactions on Information Theory 51

      Pages: 2700-2702

    • Data Source
      KAKENHI-PROJECT-17540006
  • [Journal Article] Remark on a 5-deign related to a putative extremal doubly-even self-dual [96,48.20] code.2005

    • Author(s)
      M.Harada
    • Journal Title

      Designs, Codes and Cryptogr. 37

      Pages: 355-358

    • Data Source
      KAKENHI-PROJECT-17540006
  • [Journal Article] A characterization of designs related to an extremal doubly-even self-dual code of length 482005

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

      Annals of Combinatorics 9

      Pages: 189-198

    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] On the covering radius of ternary extremal self-dual codes2005

    • Author(s)
      Masaaki Harada
    • Journal Title

      Designs, Codes and Cryptogr. 33

      Pages: 149-158

    • Data Source
      KAKENHI-PROJECT-14740060
  • [Journal Article] On some self-dual codes and unimodular lattices in dimension 482005

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

      European Journal of Combinatorics 26

      Pages: 543-557

    • Data Source
      KAKENHI-PROJECT-14654002
  • [Journal Article] Orthogonal designs, self-dual codes and the Leech lattice2005

    • Author(s)
      Masaaki Harada
    • Journal Title

      J.Combin.Designs 13

      Pages: 184-194

    • Data Source
      KAKENHI-PROJECT-14740060
  • [Journal Article] On some self-dual codes and unimodular lattices in dimension 482005

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

      European Journal of Combinatorics 26

      Pages: 543-557

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-15340002
  • [Journal Article] On some self-dual codes and unimodular lattices in dimension 482005

    • Author(s)
      Masaaki Harada
    • Journal Title

      European J.Combin. 26

      Pages: 543-557

    • Data Source
      KAKENHI-PROJECT-14740060
  • [Journal Article] Remark on a 5-design related to a putative extremal doubly-even self-dual [96,48,20] code2005

    • Author(s)
      M.Harada
    • Journal Title

      Designs, Codes and Cryptography 37

      Pages: 355-358

    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] On some self-dual codes and unimodular lattices in dimension 48.2005

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

      Europ.J.Combinatorics 26

      Pages: 543-557

    • Data Source
      KAKENHI-PROJECT-17540006
  • [Journal Article] Remark on a 5-design related to a putative extremal doubly-even self-dual [96,48,20] code2005

    • Author(s)
      M.Harada
    • Journal Title

      Designs, Codes and Cryptogr. 37

      Pages: 355-358

    • Data Source
      KAKENHI-PROJECT-17740045
  • [Journal Article] On some self-dual codes and unimodular lattices in dimension 482005

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

      European Journal of Combinatorics 26

      Pages: 543-557

    • Data Source
      KAKENHI-PROJECT-15340002
  • [Journal Article] Self-orthogonal 3-(56,12,65) designs and extremal doubly-even self-dual codes of length 562005

    • Author(s)
      M.Harada
    • Journal Title

      Designs, Codes and Cryptogr. 38

      Pages: 5-16

    • Data Source
      KAKENHI-PROJECT-17740045
  • [Journal Article] On some self-dual codes and unimodular lattices in dimension 482005

    • Author(s)
      M.Harada
    • Journal Title

      European J.Combin. 26

      Pages: 543-557

    • Data Source
      KAKENHI-PROJECT-17740045
  • [Journal Article] Orthogonal designs, self-dual codes and the Leech lattice2005

    • Author(s)
      M.Harada
    • Journal Title

      J.Combin.Designs 13

      Pages: 184-194

    • Data Source
      KAKENHI-PROJECT-17740045
  • [Journal Article] On some self-dual codes and unimodular lattices in dimension 482005

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

      European Journal of Combinatorics 26

      Pages: 543-557

    • Data Source
      KAKENHI-PROJECT-17340020
  • [Journal Article] Symmetric (4,4)-nets and generalized Hadamard matrices over groups of order 42005

    • Author(s)
      M.Harada
    • Journal Title

      Designs, Codes and Cryptogr. 34

      Pages: 71-87

    • Data Source
      KAKENHI-PROJECT-17740045
  • [Journal Article] On a 5-design related to an extremal doubly-even self-dual code of length 722004

    • Author(s)
      Masaaki Harada
    • Journal Title

      J.Combin.Theory Ser.A 107

      Pages: 143-146

    • Data Source
      KAKENHI-PROJECT-14740060
  • [Journal Article] Covering radius problems for ternary self-dual codes.2004

    • Author(s)
      M.Harada, M.Ozeki, K.Tanabe
    • Journal Title

      Design, Codes and Cryptology 33

      Pages: 149-158

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-14540004
  • [Journal Article] On a 5-design related to an extremal doubly even self-dualcode of length 722004

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

      Journal of Combinatorial Theory (A) 107

      Pages: 143-146

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-15340002
  • [Journal Article] Some Hadamard matrices of order 32 and their binary codes2004

    • Author(s)
      M.Harada, M.Araya, H.Kharaghani
    • Journal Title

      J.Combin.Designs 12

      Pages: 142-146

    • Data Source
      KAKENHI-PROJECT-14540004
  • [Journal Article] Extremal self-dual [40, 20, 8] codes with covering radius 72004

    • Author(s)
      Masaaki Harada
    • Journal Title

      Finite Fields and Their Applications 10

      Pages: 183-197

    • Data Source
      KAKENHI-PROJECT-14740060
  • [Journal Article] On a 5-design related to an extremal doubly even self-dual code of length 722004

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

      Journal of Combinatorial Theory (A) 107

      Pages: 143-146

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-15340002
  • [Journal Article] Covering radius problems for ternary self-dual codes2004

    • Author(s)
      M.Ozeki, M.Harada, K.Tanabe
    • Journal Title

      Design, Codes and Cryptology 33

      Pages: 149-159

    • Data Source
      KAKENHI-PROJECT-14540004
  • [Journal Article] Covering radius problems for ternary self-dual codes2004

    • Author(s)
      M.Harada, M.Ozeki, K.Tanabe
    • Journal Title

      Design, Codes and Cryptology Vol.33

      Pages: 149-158

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-14540004
  • [Journal Article] On a 5-design related to an extremal doubly even self-dual code of length 722004

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

      Journal of Combinatorial Theory (A) 107

      Pages: 143-146

    • Data Source
      KAKENHI-PROJECT-14654002
  • [Journal Article] Type II codes over √<t_2>+u√<t_2> and applications to Hermitian modular forms2003

    • Author(s)
      E.Bannai, M.Harada, T.Ibukiyama, A.Munemasa, M.Oura
    • Journal Title

      Abh. Math. Sem. Univ. Humburg 73

      Pages: 13-42

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-13440011
  • [Journal Article] Tertiary code construction of odd unimodular extremal lattices2002

    • Author(s)
      M.Harada, M.Kitazume, M.Ozeki
    • Journal Title

      Journal of Algebraic Combinatorics Vol.16

      Pages: 209-223

    • Description
      「研究成果報告書概要(欧文)」より
    • Data Source
      KAKENHI-PROJECT-14540004
  • [Journal Article] Ternary code construction of odd unimodular extremal lattices.2002

    • Author(s)
      M.Harada, M.Kitazume, M.Ozeki
    • Journal Title

      Journal of Algebraic Combinatorics 16

      Pages: 209-223

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-14540004
  • [Journal Article] Extremal self-Dual Cades of Length 64 through Neighbors and Covering Randii

    • Author(s)
      M.Kitazame, N.CHigira, M.Harada
    • Journal Title

      Designs, Cades and Crytography (to appear)

    • Description
      「研究成果報告書概要(和文)」より
    • Data Source
      KAKENHI-PROJECT-17540006
  • [Journal Article] Hadamard matrices of order 32 and extremal ternary self-dual codes

    • Author(s)
      別宮耕一・原田昌晃・木村浩
    • Journal Title

      Designs, Codes and Cryptography (印刷中)

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19540048
  • [Journal Article] Classification of self-dual codes of length 36

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

      Advances Math.Communications

      Volume: (掲載決定)

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Journal Article] On the existence of extremal Type II Z_<2k>-codes

    • Author(s)
      M. Harada, T. Miezaki
    • Journal Title

      Mathematics of Computation

      Volume: (掲載決定)

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-23654029
  • [Journal Article] Classification of quaternary Hermitian self-dual codes of length 20

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

      IEEE Trans.Inform.Theory (掲載決定)

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Journal Article] On some self-dual codes and unimodular lattices in dimension 48

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

      European Journal of Combinatories (in press)

    • Data Source
      KAKENHI-PROJECT-14540004
  • [Journal Article] Some Self-Dual Codes Invariant under the Hall-Janko Group

    • Author(s)
      N. Chigira, M. Kitazume, M. Harada
    • Journal Title

      Journal of Algebra 316

      Pages: 578-590

    • Peer Reviewed
    • Data Source
      KAKENHI-PROJECT-19340002
  • [Journal Article] Finite permutation groups and self-orthogonal codes

    • Author(s)
      M.Kitazume, N.Chigira, M.Harada
    • Journal Title

      Desigins,Codes and Crytography (to appear)

    • Data Source
      KAKENHI-PROJECT-17540006
  • [Presentation] On linear complementary dual codes2019

    • Author(s)
      原田昌晃
    • Organizer
      組合せ論的符号理論
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Presentation] Quasi-unbiased Hadamard matrices and weakly unbiased Hadamard matrices2016

    • Author(s)
      新谷 誠, 原田昌晃, 須田庄
    • Organizer
      実験計画法と符号および関連する組合せ構造
    • Place of Presentation
      秋保リゾートホテルクレセント(宮城県仙台市)
    • Data Source
      KAKENHI-PROJECT-15K04976
  • [Presentation] On the nonexistence of certain extremal doubly even self-dual codes2016

    • Author(s)
      原田昌晃
    • Organizer
      離散数学とその応用研究集会2016
    • Place of Presentation
      高城コミュニティセンター(宮城県宮城郡松島町)
    • Year and Date
      2016-08-21
    • Data Source
      KAKENHI-PROJECT-15H03633
  • [Presentation] On a 5-design related to an extremal doubly even self-dual code of length 722014

    • Author(s)
      原田昌晃
    • Organizer
      Workshop on Hadamard Matrices and Combinatorial Designs
    • Place of Presentation
      東北大学大学院情報科学研究科
    • Year and Date
      2014-10-31
    • Data Source
      KAKENHI-PROJECT-26610032
  • [Presentation] Ontheexistenceofextremal Type II Z_<2k>-codes2012

    • Author(s)
      原田昌晃
    • Organizer
      離散数学とその応用研究集会2012
    • Place of Presentation
      茨城大学
    • Year and Date
      2012-08-09
    • Data Source
      KAKENHI-PROJECT-23654029
  • [Presentation] Magma へ貢献できること2012

    • Author(s)
      原田 昌晃
    • Organizer
      Magmaで開く数学の世界
    • Place of Presentation
      高知大学
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Presentation] Unimodular lattices with long shadows2011

    • Author(s)
      原田昌晃
    • Organizer
      離散数理構造とその応用
    • Place of Presentation
      名古屋大学
    • Year and Date
      2011-11-18
    • Data Source
      KAKENHI-PROJECT-23340021
  • [Presentation] 自己双対符号とその周辺2010

    • Author(s)
      原田昌晃
    • Organizer
      第55回代数学シンポジウム
    • Place of Presentation
      北海道大学
    • Year and Date
      2010-08-12
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Presentation] Extremal Type II Z_<2k>-codes2009

    • Author(s)
      原田昌晃
    • Organizer
      代数学と計算
    • Place of Presentation
      首都大学東京
    • Year and Date
      2009-12-02
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Presentation] On the classification of extremal Type II Z_4-codes of length 242009

    • Author(s)
      原田昌晃
    • Organizer
      Korea-Japan Workshop on Algebra and Combinatorics
    • Place of Presentation
      Pusan National University、韓国
    • Year and Date
      2009-02-09
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Presentation] Two recent results in extremal self-dual codes2008

    • Author(s)
      M, Harada
    • Organizer
      The 4th Korea-Japan Workshop on Algebra and Combinatorics
    • Place of Presentation
      浦項工科大・韓国
    • Year and Date
      2008-02-01
    • Data Source
      KAKENHI-PROJECT-17740045
  • [Presentation] Self-dual codeの分類について2008

    • Author(s)
      原田昌晃
    • Organizer
      離散数学とその応用研究集会
    • Place of Presentation
      茨城大学
    • Year and Date
      2008-08-21
    • Data Source
      KAKENHI-PROJECT-20540103
  • [Presentation] Self-dual code とその周辺

    • Author(s)
      原田昌晃
    • Organizer
      日本数学会 2013 年度秋季総合分科会
    • Place of Presentation
      愛媛大学
    • Invited
    • Data Source
      KAKENHI-PROJECT-23340021
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