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Distance-increasing mappings from binary vectors to permutations that increase hamming distances by at least two

机译:从二进制向量到置换的距离增加映射,使汉明距离至少增加两个

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摘要

In this correspondence, for any k /spl ges/ 2, we first propose two constructions of (n,k) distance-increasing mappings (DIMs) from the set of binary vectors of length n to the set of permutations of the same length that strictly increase the Hamming distance by at least k except when it is obviously not possible. Next, we prove that for any k /spl ges/ 2, there is a smallest positive integer n/sub k/ such that an (n,k) DIM can be constructed for any n /spl ges/ n/sub k/. An explicit upper bound on n/sub k/ is also given.
机译:在此对应关系中,对于任何k / spl ges / 2,我们首先提出两种构造(n,k)距离增加映射(DIM),其长度为n的二元向量集到长度相同的置换集严格将汉明距离至少增加k,除非明显不可能。接下来,我们证明对于任何k / spl ges / 2,都有一个最小的正整数n / sub k /,这样就可以为任何n / spl ges / n / sub k /构造(n,k)DIM。还给出了n / sub k /的明确上限。

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