2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/76910Let X be a projective complex 3-fold, quasihomogeneous with respect to an action of a linear algebraic group. We show that X is a compactification of SL_2/G, G a discrete subgroup, or that X can be equivariantly transformed into the 3-dim. projective space, the quadric Q_3, or into certain quasihomogeneous bundles with very simple structure.Algebraic Geometry14M17(Primary) 14L30, 32M12 (Secondary)text