2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71842We give sharp lower bounds for the postulation of the nodes of a general plane projection of a smooth connected curve C in P^r and we study the relationships with the geometry of the embedding. Strict connections with Castelnuovo's theory and Halphen's theory are shown.LaTeX, 26 pagesAlgebraic Geometry14H50text