Let Γ be a discrete abelian group, and Γ∧ = G its compact abelian dual group. E ⊂ Γ is called a p-Sidon set, 1 ≦ p < 2, if CE(G)∧⊆ lp(E). In this paper, a sufficient condition for p-Sidon is displayed and some applications are given.
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