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arXiv 1802.07196math.CO
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关于有限阿贝尔群的Davenport常数

On Davenport constant of finite abelian groups

Dongchun Han

摘要:

$G$是一个加法有限交换群.达文波特常数$\mathsf D(G)$是最小整数$t$,使得长度为$|S|\ge t$的$G$上的每个序列(多集)$S$具有非空零和子序列。最近,B。Girard证明了对于每一个固定的整数$r > 1$的达文波特常数$\mathsf D(C_n^r)$是渐近$rn$时$n$趋于无穷大。本文对每一个固定的正整数$r$,证明了$$\mathsf D(C_n^r)=rn+O(\frac{n}{\ln n}).$$这是B.吉拉德此外,对某些特殊类型的$n$,我们还得到了误差项的较好估计。最后,我们得到了某些特殊类型的有限阿贝尔群的一个渐近结果。我们的证明结合了零和理论中的经典论点,以及一些基本工具和解析数论的结果。

英文摘要:

$G$ be an additive finite abelian group. The Davenport constant $\mathsf D(G)$ is the smallest integer $t$ such that every sequence (multiset) $S$ over $G$ of length $|S|\ge t$ has a non-empty zero-sum subsequence. Recently, B. Girard proved that for every fixed integer $r > 1$ the Davenport constant $\mathsf D(C_n^r)$ is asymptotic to $rn$ when $n$ tends to infinity. In this paper, for every fixed positive integer $r$, we prove that $$\mathsf D(C_n^r)=rn+O(\frac{n}{\ln n}).$$ This is an explicit version of the above result of B. Girard. Furthermore, we can get better estimates of the error term for some $n$ of special types. Finally, we get an asymptotic result for some finite abelian groups of special types. Our proof combines a classical argument in the zero-sum theory together with some basic tools and results from analytic number theory.

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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