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arXiv 1807.09474cs.ITmath.IT
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$σ$-$\mathbb F_{p^m}+u\mathbb F_{p^m}$上长度为$p^s$的自正交常循环码

$σ$-self-orthogonal constacyclic codes of length $p^s$ over $\mathbb F_{p^m}+u\mathbb F_{p^m}$

Hongwei Liu, Jingge Liu

摘要:

本文研究了有限交换链环$\mathbb F_{p^m} + u \mathbb F_{p^m}$上长度为$p^s$的常循环码的$σ$ -自正交性,其中$u^2=0$和$σ$是$\mathbb F_{p^m} + u \mathbb F_{p^m}$的环自同构.首先,我们得到了$\mathbb F_{p^m} + u \mathbb F_{p^m}$上长度为$p^s$的$σ$-$λ$ -常循环码的对偶码的结构.然后给出了$λ$ -常循环码是$σ$ -自正交码的充要条件。特别地,我们确定了长度为$p^s$的$σ$ -自对偶常循环码在$\mathbb F_{p^m} + u \mathbb F_{p^m}$上。最后,我们将结果推广到长度为$2 p^s$的常循环码。

英文摘要:

In this paper, we study the $σ$-self-orthogonality of constacyclic codes of length $p^s$ over the finite commutative chain ring $\mathbb F_{p^m} + u \mathbb F_{p^m}$, where $u^2=0$ and $σ$ is a ring automorphism of $\mathbb F_{p^m} + u \mathbb F_{p^m}$. First, we obtain the structure of $σ$-dual code of a $λ$-constacyclic code of length $p^s$ over $\mathbb F_{p^m} + u \mathbb F_{p^m}$. Then, the necessary and sufficient conditions for a $λ$-constacyclic code to be $σ$-self-orthogonal are provided. In particular, we determine the $σ$-self-dual constacyclic codes of length $p^s$ over $\mathbb F_{p^m} + u \mathbb F_{p^m}$. Finally, we extend the results to constacyclic codes of length $2 p^s$.

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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