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arXiv 2103.07393math.COcs.ITmath.IT
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射影空间中的短极小码与强块集覆盖码

Short minimal codes and covering codes via strong blocking sets in projective spaces

Tamás Héger, Zoltán Lóránt Nagy

摘要:

极小线性码与有限域上射影空间的特殊类型的阻塞集一一对应,这些阻塞集被称为强阻塞集或截阻塞集。本文证明了$q$元Galois域上维数为$k$且在$q$和$k$中均为线性的极小码的最小码长的一个上界,从而改进了已有的超线性界.这个结果决定了最小长度,直到一个小的常数因子。我们还改进了射影空间中所谓的higgledy-piggledy线集大小的上下上界,并应用这些结果给出了射影空间中覆盖码和饱和集大小的改进界.贡献依赖于几何和概率参数。

英文摘要:

Minimal linear codes are in one-to-one correspondence with special types of blocking sets of projective spaces over a finite field, which are called strong or cutting blocking sets. In this paper we prove an upper bound on the minimal length of minimal codes of dimension $k$ over the $q$-element Galois field which is linear in both $q$ and $k$, hence improve the previous superlinear bounds. This result determines the minimal length up to a small constant factor. We also improve the lower and upper bounds on the size of so called higgledy-piggledy line sets in projective spaces and apply these results to present improved bounds on the size of covering codes and saturating sets in projective spaces as well. The contributions rely on geometric and probabilistic arguments.

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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