2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/68757We study the restrictions of rank 2 semistable vector bundles E on P^2 to conics. A Grauert-Mulich type theorem on the generic splitting is proven. The jumping conics are shown to have the scheme structure of a hypersurface J_{2} in P^5 of degree c_{2}(E) when c_{1}(E)=0 and of degree c_{2}(E)-1 when c_{1}(E)=-1. Some examples of jumping conics and jumping lines are studied in detail.21 pages,AMSLaTeX Exposition improved, important reference added, minor errors correctedAlgebraic Geometry14J60;14F05text