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arXiv 2109.00613cs.ITmath.COmath.IT
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非二进制直径完美等重码

Non-Binary Diameter Perfect Constant-Weight Codes

Tuvi Etzion

摘要:

直径完美码形成完美码的自然推广。它们是基于码-逆码界的推广球包装界。Delsarte证明了距离正则图的码-反码界,它也适用于其他一些度量。本文利用Hamming度量证明了非二元等重码的上界,并刻画了这类码的直径完美码和最大码长。我们区分六个家庭的非二进制直径等重码和四个家庭的最大尺寸的非二进制等重反码。这些直径完美码族中的每一个都提出了一些不同的问题。我们考虑了其中的一些问题,并为进一步的研究留下了很多基础。最后,作为结果,构造了与著名的Erdös-Ko-Rado定理相关的一些t-交族.

英文摘要:

Diameter perfect codes form a natural generalization for perfect codes. They are based on the code-anticode bound which generalizes the sphere-packing bound. The code-anticode bound was proved by Delsarte for distance-regular graphs and it holds for some other metrics too. In this paper we prove the bound for non-binary constant-weight codes with the Hamming metric and characterize the diameter perfect codes and the maximum size anticodes for these codes. We distinguish between six families of non-binary diameter constant-weight codes and four families of maximum size non-binary constant-weight anticodes. Each one of these families of diameter perfect codes raises some different questions. We consider some of these questions and leave lot of ground for further research. Finally, as a consequence, some t-intersecting families related to the well-known Erdös-Ko-Rado theorem, are constructed.

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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