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Classification of the extremal formally self-dual even codes of length 30. (English) Zbl 1213.94169
Summary: It is known that there are extremal formally self-dual even codes which are not self-dual only for lengths 6, 10, 12, 14, 18, 20, 22, 28 and 30. We complete the classification of extremal formally self-dual even codes by examining the case for length 30.

MSC:
94B05 Linear codes, general
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