A Generalization of Vosper’s Theorem
摘要
Let ℤ/mℤ be the ring of residual classes modulo m, and let A and B be nonempty subsets of ℤ/mℤ. In this paper, the authors give the structure of A and B for which ∣A + B∣ = ∣A∣ + ∣B∣ − 1 = m − 2.