Self-dual codes have been actively studied because of their connections with other mathematical areas including $t$-designs, invariant theory, group theory, lattices, and modular forms. We presented the building-up construction for self-dual codes over $GF(q)$ with $q equiv 1 pmod 4$, and over other certain rings (see~cite{KimLee},~cite{KimLee2}). Since then, the existence of the building-up construction for the open case over $GF(q)$ with $q=p^r equiv 3 pmod 4$ with an odd prime $p$ satisfying $p equiv 3 pmod 4$ with $r$ odd has not been solved. In this paper, we answer it positively by presenting the building-up construction explicitly. As examples, we present new optimal self-dual $[16,8,7]$ codes over $GF(7)$ and new self-dual codes over $GF(7)$ with the best known parameters $[24,12,9]$.
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机译:由于对偶代码与其他数学领域(包括$ t $-设计,不变理论,群论,格和模块化形式)的联系,人们一直在积极研究它们。我们针对$ GF(q)$和$ q equiv 1 pmod 4 $以及其他某些环(参见〜 cite {KimLee},〜 cite {KimLee2})提出了自对偶代码的构造构造)。从那时起,对于$ GF(q)$且$ q = p ^ r equiv 3 pmod 4 $且奇数素数$ p $满足$ p equiv 3 的开放案例,存在构建结构的存在。带有$ r $奇数的pmod 4 $尚未解决。在本文中,我们通过明确提出建筑结构来积极回答。作为示例,我们提出了具有最佳参数$ [24,12]的$ GF(7)$上的新的最优自对偶$ [16,8,7] $代码和$ GF(7)$上的新自对偶代码,9] $。
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