Abstract.
Lengths 22 and 30 are so far the only open cases in the classification of extremal formally self-dual even codes. In this paper, a classification of the extremal formally self-dual even codes of length 22 is given. There are 41520 such codes.A variety of properties of these codes are investigated. In particular, new 2-(22, 6, 5) designs are constructed from the codes.
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Received: February 9, 2000
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Harada, M., Östergård, P. Classification of Extremal Formally Self-Dual Even Codes of Length 22. Graphs Comb 18, 507–516 (2002). https://doi.org/10.1007/s003730200037
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DOI: https://doi.org/10.1007/s003730200037