2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/139327We prove a T(1) theorem for bilinear singular integral operators (trilinear forms) with a one-dimensional modulation symmetry.62 pages, 1 figureClassical Analysis and ODEsAnalysis of PDEs42B15, 42B20, 42A20text