2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/62427Cubic forms in three variables are parametrised by points of $¶^9$. We study the subvarieties in this space defined by decomposable forms. Specifically, we calculate the equivariant minimal resolutions of these varieties and describe their ideals invariant-theoretically.Algebraic Geometry14-04, 14L35text