2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/61676For a surjective and proper map f: X -> Y there is a spectral sequence, called descent spectral sequence, abutting to the cohomology of Y with coefficients in a sheaf F. We prove that if the fibers of the map f satisfy some connectivity condition then the spectral sequence has a vanishing line.Algebraic Geometry14F45text