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arXiv 1902.07628math.CO
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关于由Hamming码导出的完全正则和完全传递码

On completely regular and completely transitive codes derived from Hamming codes

J. Borges, J. Rifà, V. A. Zinoviev

摘要:

给定$q$元汉明码的奇偶校验矩阵$H_m$,我们考虑将列划分为两个子集。然后,我们认为这两个代码,这些子矩阵的奇偶校验矩阵。我们说这两个代码中的任何一个都是另一个的补充代码。我们得到,如果这些码之一是汉明码,则补充码是完全正则且完全传递的。如果其中一个码是覆盖半径为$2$的完全正则码,则补充码也是覆盖半径至多为$2$的完全正则码。此外,在这种情况下,要么两个代码都是完全传递的,要么两者都不是。利用这种方法,我们得到了拟完美一致填充的完全正则和完全传递码的无限族。

英文摘要:

Given a parity-check matrix $H_m$ of a $q$-ary Hamming code, we consider a partition of the columns into two subsets. Then, we consider the two codes that have these submatrices as parity-check matrices. We say that anyone of these two codes is the supplementary code of the other one. We obtain that if one of these codes is a Hamming code, then the supplementary code is completely regular and completely transitive. If one of the codes is completely regular with covering radius $2$, then the supplementary code is also completely regular with covering radius at most $2$. Moreover, in this case, either both codes are completely transitive, or both are not. With this technique, we obtain infinite families of completely regular and completely transitive codes which are quasi-perfect uniformly packed.

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