科研之友
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摘要
The purpose of the paper is to provide a unified way to formulate zero-sum invariants. Let G be a finite additive abelian group. Let B(G) denote the monoid of all zero-sum sequences over G. For Omega subset of B(G), let d(Omega)(G) be the smallest integer t such that every sequence S over G of length vertical bar S vertical bar >= t has a subsequence in Omega. We provide some first results and open problems on d(Omega)(G).
