EN
Let $σ_{i}$, i = 1,2,3, denote positive Borel measures on ℝⁿ, let 𝓓 denote the usual collection of dyadic cubes in ℝⁿ and let K: 𝓓 → [0,∞) be a map. We give a characterization of a trilinear embedding theorem, that is, of the inequality
$∑_{Q∈𝓓} K(Q)∏_{i=1}^{3} |∫_{Q} f_{i}dσ_{i}| ≤ C∏_{i=1}^{3} ||f_{i}||_{L^{p_{i}}(dσ_{i})}$
in terms of a discrete Wolff potential and Sawyer's checking condition, when 1 < p₁,p₂,p₃ < ∞ and 1/p₁ + 1/p₂ + 1/p₃ ≥ 1.