2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/139020We show that a Lie algebra having a nilpotent radical has a fundamental set of invariants consisting of Casimir operators. We give a different proof of this fact in the special and well-known case where the radical is abelian.4 pagesOptimization and ControlGroup Theory24; 56text