2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/77179We prove a topological result concerning the kernel of a morphism d : E --> F of holomorphic vector bundles over a complex analytic space. As a consequence, we show that the projectivization P(ker d) is a quasifibration up to some dimension. We give an application to the Abel-Jacobi map of a Riemann surface, and to the space of rational curves in the symmetric product of a Riemann surface.10 pages, AMS-LaTeXAlgebraic Geometry14E40text