2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/102119It is well-known that the intersection multiplicities of Schubert classes in the Grassmanian are Littlewood-Richardson coefficients. We generalize this statement in the context of quiver representations. Here the intersection multiplicity of Schubert classes is replaced by the number of subrepresentations of a general quiver reprsentation, and the Littlewood-Richardson coefficients are replaced by the the dimension of a certain space of semiinvariants.15 pages, new section on good filtrationsAlgebraic Geometry16G20,13A50, 14N15, 14C17text