# 特邀南开大学高维东教授来校做学术报告

For a positive integer k, let f(k) denote the largest integer t such that for every finite abelian group G and every zero-sum free subset S of G, if |S|=k then |\Sigma(S)|\ge t. We prove that f(k) \ge \frac{1}{6}k^2, which significantly improves a result of J.E. Olson. We also supply some interesting results on f(k).

2019年11月6日