2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/170387Let X be a proper scheme over a field k which satisfies Serre's condition S2 and G a reductive group over k. We prove that the functor of principal G-bundles defined away from a non-fixed closed subset in X of codimension at least 3, is an algebraic stack in the sense of Artin.15 pagesAlgebraic Geometry14D20text