Abstract
For a finite abelian group G, let (G) denote the smallest integer l such that every sequence S over G of length | S| l has a zero-sum subsequence of length exp (G). We derive new upper and lower bounds for (G), and all our bounds are sharp for special types of groups. The results are not restricted to groups G of the form , but they respect the structure of the group. In particular, we show for all odd n, which is sharp if n is a power of 3. Moreover, we investigate the relationship between extremal sequences and maximal caps in finite geometry.
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