arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1703.08652math.CO
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循环图中的完美码

Perfect codes in circulant graphs

Rongquan Feng, He Huang, Sanming Zhou

摘要:

图$Γ= (V, E)$中的完美码是$V$的子集$C$,$C$是一个独立的集合,使得$V \setminus C$中的每个顶点恰好与$C$中的一个顶点相邻。$Γ$中的完全码是$V$的子集$C$,使得$V$的每个顶点恰好与$C$中的一个顶点相邻。汉明图$H(n, q)$中的完美码与经典情形下长度为$n$的$q$ -元完美1-码一致.本文给出了度为$p-1$的循环图存在完美码的一个充要条件,其中$p$是奇素数。我们还得到了阶为$n$,度为$p^l-1$的循环图有完美码的一个充要条件,其中$p$是素数,$p^l$是$p$除$n$的最大幂.对于完全完美码也得到了类似的结果。

英文摘要:

A perfect code in a graph $Γ= (V, E)$ is a subset $C$ of $V$ that is an independent set such that every vertex in $V \setminus C$ is adjacent to exactly one vertex in $C$. A total perfect code in $Γ$ is a subset $C$ of $V$ such that every vertex of $V$ is adjacent to exactly one vertex in $C$. A perfect code in the Hamming graph $H(n, q)$ agrees with a $q$-ary perfect 1-code of length $n$ in the classical setting. In this paper we give a necessary and sufficient condition for a circulant graph of degree $p-1$ to admit a perfect code, where $p$ is an odd prime. We also obtain a necessary and sufficient condition for a circulant graph of order $n$ and degree $p^l-1$ to have a perfect code, where $p$ is a prime and $p^l$ the largest power of $p$ dividing $n$. Similar results for total perfect codes are also obtained in the paper.

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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