Let A be a subset of an abelian group. Let hA denote the set of all sums of h elements of A with repetitions allowed, and let h ∧ A denote the set of all sums of h distinct elements of A, that is, all sums of the form a 1+⋯+a h, where a 1,…, a h ∈A and a i ≠a j for i≠j.
CITATION STYLE
Nathanson, M. B. (2013). Ballot numbers, alternating products, and the erdős-heilbronn conjecture. In The Mathematics of Paul Erdos I, Second Edition (pp. 187–205). Springer New York. https://doi.org/10.1007/978-1-4614-7258-2_13
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