2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/220231We introduce a notion of regularity for coherent sheaves on Grassmannians of lines. We use this notion to prove some extension of Evans-Griffith criterion to characterize direct sums of line bundles. We also give a cohomological characterization of exterior and symmetric powers of the universal bundles of the Grassmannian.10 pages, no figuresAlgebraic Geometry14F05, 14J60text