2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/121655We show that a rational normal scroll can in general be set-theoretically defined by a proper subset of the 2-minors of the associated two-row matrix. This allows us to find a class of rational normal scrolls that are almost set-theoretic complete intersections.Algebraic GeometryCommutative Algebra13C40; 13A15; 14J26; 14M10; 14M12text