Cariñena, J.F.; de Lucas, J.; Rañada, M.F.
(Symmetry, Integrability and Geometry: Methods and Applications, 2008)
We review some recent results of the theory of Lie systems in order to apply such results to study Ermakov systems. The fundamental properties of Ermakov systems, i.e. their superposition rules, the Lewis-Ermakov invariants, ...