2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/224701We give a div-curl type lemma for the wedge product of closed differential forms on R^n when they have coefficients respectively in a Hardy space and L^infinity or BMO. In this last case, the wedge product belongs to an appropriate Hardy-Orlicz space.Classical Analysis and ODEsComplex Variables42B30 (Primary) 58A10 (Secondary)text