Remarks on a generalization of the Davenport constant

Details Remarks on a generalization of the Davenport constant Remarks on a generalization of the Davenport constant

2009-05-26

arxiv.org/abs/0905.4248v2

Mathematics

Number Theory

Various expository changes, updated and slightly expanded bibliography

Scientific paper

A generalization of the Davenport constant is investigated. For a finite abelian group $G$ and a positive integer $k$, let $D_k(G)$ denote the smallest $\ell$ such that each sequence over $G$ of length at least $\ell$ has $k$ disjoint non-empty zero-sum subsequences. For general $G$, expanding on known results, upper and lower bounds on these invariants are investigated and it is proved that the sequence $(D_k(G))_{k\in\mathbb{N}}$ is eventually an arithmetic progression with difference $\exp(G)$, and several questions arising from this fact are investigated. For elementary 2-groups, $D_k(G)$ is investigated in detail; in particular, the exact values are determined for groups of rank four and five (for rank at most three they were already known).

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