2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/209209We present a survey of some aspects and new results on configurations, i.e. disjoint unions of constellations of infinitely near points, local and global theory, with some applications and results on generalized Enriques diagrams, singular foliations, and linear systems defined by clusters.Algebraic Geometry14C20, 14M25, 13B22text