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arXiv 1904.04077math.GRcs.ITmath.IT
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关于非G-等价极小阿贝尔码的个数

On the number of non-G-equivalent minimal abelian codes

Fatma Altunbulak Aksu, İpek Tuvay

摘要:

设$G$是有限的阿贝尔群. Ferraz,Guerreiro和Polcino Milies证明了极小交换码的$G$ -等价类的个数等于对应的交换子是循环的子群的$G$ -同构类的个数。本文证明了$G$ -同构的概念等价于$G$的所有子群$H$的集合上的同构的概念,并证明了$G/H$是循环的.作为应用,我们计算了某些特定阿贝尔群族的非$G$等价极小阿贝尔码的个数。证明了非$G$等价的极小阿贝尔码的个数等于$G$的指数的因子个数当且仅当对于除$G$阶的每个素数$p$,$G$的Sylow $p$ -子群是同素循环的.

英文摘要:

Let $G$ be a finite abelian group. Ferraz, Guerreiro and Polcino Milies prove that the number of $G$-equivalence classes of minimal abelian codes is equal to the number of $G$-isomorphism classes of subgroups for which corresponding quotients are cyclic. In this article, we prove that the notion of $G$-isomorphism is equivalent to the notion of isomorphism on the set of all subgroups $H$ of $G$ with the property that $G/H$ is cyclic. As an application, we calculate the number of non-$G$-equivalent minimal abelian codes for some specific family of abelian groups. We also prove that the number of non-$G$-equivalent minimal abelian codes is equal to number of divisors of the exponent of $G$ if and only if for each prime $p$ dividing the order of $G$, the Sylow $p$-subgroups of $G$ are homocyclic.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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