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There exists no self-dual [24,12,10] code over $${{mathbb F}_5}$$
Authors:Masaaki Harada  Akihiro Munemasa
Affiliation:(1) Department of Mathematical Sciences, Yamagata University, Yamagata 990-8560, Japan;(2) Graduate School of Information Sciences, Tohoku University, Sendai 980-8579, Japan
Abstract:Self-dual codes over $${{mathbb F}_5}$$ exist for all even lengths. The smallest length for which the largest minimum weight among self-dual codes has not been determined is 24, and the largest minimum weight is either 9 or 10. In this note, we show that there exists no self-dual [24, 12, 10] code over $${{mathbb F}_5}$$ , using the classification of 24-dimensional odd unimodular lattices due to Borcherds.
Keywords:Self-dual code  Minimum weight  Construction A  Unimodular lattice
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