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arXiv 1206.4480math.AG
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高阶厄米特码

Hermitian codes from higher degree places

Gábor Korchmáros, Gábor P. Nagy

摘要:

马修斯和米歇尔研究了某些代数几何代码中的最小距离,这些代码是由更高的度位$P$产生的。根据$P$的Weierstrass缺口序列,他们证明了一个改进设计最小距离的界限。本文考虑了由厄米函数域构造的这类码。我们确定了Weierstrass缺口序列$G(P)$,其中$P$是3度位置,并计算了相应改进的Matthews和Michel界限。我们展示了更多的改进,使用不同的方法基于几何。我们还比较了我们的结果与Hermitian 1-点码的最小距离的真实值,以及由于邢和陈的估计。

英文摘要:

Matthews and Michel investigated the minimum distances in certain algebraic-geometry codes arising from a higher degree place $P$. In terms of the Weierstrass gap sequence at $P$, they proved a bound that gives an improvement on the designed minimum distance. In this paper, we consider those of such codes which are constructed from the Hermitian function field. We determine the Weierstrass gap sequence $G(P)$ where $P$ is a degree 3 place, and compute the Matthews and Michel bound with the corresponding improvement. We show more improvements using a different approach based on geometry. We also compare our results with the true values of the minimum distances of Hermitian 1-point codes, as well as with estimates due Xing and Chen.

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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