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A zero-sum theorem over Z
A zero-sum sequence of integers is a sequence of nonzero terms that sum to 0.
Let be an integer and let denote the set of all nonzero integers
between and . Let be the smallest integer such that
any zero-sum sequence with elements from and length greater than
contains a proper nonempty zero-sum subsequence. In this paper, we prove
a more general result which implies that for .Comment: 11 pape