Short Zero-Sum Sequences Over Abelian $p$-Groups of Large Exponent

Let $G$ be a finite abelian group with exponent $n$. Let $η(G)$ denote the smallest integer $\ell$ such that every sequence over $G$ of length at least $\ell$ has a zero-sum subsequence of length at most $n$. We determine the precise value of $η(G)$ when $G$ is a $p$-group whose Davenport constant is at most $2n-1$. This confirms one of the equalities in a conjecture by Schmid and Zhuang from 2010.

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