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arXiv 0810.3223math.NT
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有限阿贝尔群的临界数

The critical number of finite abelian groups

Michael Freeze, Weidong Gao, Alfred Geroldinger

摘要:

设G是可加的有限交换群. $G$的临界数$\mathsf{cr}(G)$是最小的正整数$\ell$,使得对于具有$|S| \ge \ell$的每个子集$S \subset G \setminus \{0\}$,以下成立:$G$的每个元素都可以写为来自$S$的不同元素的非空和。临界数是由Erdens和H.海尔布隆在1964年,由于贡献的许多作者的价值$\mathsf {cr}(G)$是已知的所有有限的阿贝尔群$G$除了$G \cong \mathbb{Z}/pq\mathbb{Z}$其中$p,q$是素数,使$p+\lfloor2\sqrt{p-2}\rfloor+1<q<2p$。我们确定,$\mathsf {cr}(G)=p+q-2$为这样的群体。

英文摘要:

Let G be an additive, finite abelian group. The critical number $\mathsf{cr}(G)$ of $G$ is the smallest positive integer $\ell$ such that for every subset $S \subset G \setminus \{0\}$ with $|S| \ge \ell$ the following holds: Every element of $G$ can be written as a nonempty sum of distinct elements from $S$. The critical number was first studied by P. Erdős and H. Heilbronn in 1964, and due to the contributions of many authors the value of $\mathsf {cr}(G)$ is known for all finite abelian groups $G$ except for $G \cong \mathbb{Z}/pq\mathbb{Z}$ where $p,q$ are primes such that $p+\lfloor2\sqrt{p-2}\rfloor+1<q<2p$. We determine that $\mathsf {cr}(G)=p+q-2$ for such groups.

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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