Self-orthogonal designs and extremal doubly even codes

V.D. Tonchev

    Research output: Contribution to journalArticleAcademicpeer-review

    35 Citations (Scopus)


    A general method unifying the known constructions of binary self-orthogonal codes from designs is described. As an application more than 70 inequivalent extremal doubly even self-dual codes of length 40 are constructed from Hadamard matrices of order 20. Some of these codes do not admit nontrivial automorphisms of odd orders, and there is a code with trivial automorphism group.
    Original languageEnglish
    Pages (from-to)197-205
    Number of pages9
    JournalJournal of Combinatorial Theory, Series A
    Issue number2
    Publication statusPublished - 1989


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