2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/295In this paper we define a Poisson structure on some moduli spaces related to principal G-bundles on elliptic curves, the simplest example being the moduli space of stable pairs: a vector bundle and its global section. We also study birational morphisms between projective spaces appearing as such moduli spaces.20 pages, AMSLatexAlgebraic Geometrytext