%0 Journal Article %A Ancochea Bermúdez, José María %A Campoamor-Stursberg, Rutwig %A Vergnolle, L.G. %T Solvable Lie algebras with naturally graded nilradicals and their invariants %D 2006 %@ 0305-4470 %U https://hdl.handle.net/20.500.14352/49809 %X The indecomposable solvable Lie algebras with graded nilradical of maximal nilindex and a Heisenberg subalgebra of codimension one are analysed, and their generalized Casimir invariants are calculated. It is shown that rank one solvable algebras have a contact form, which implies the existence of an associated dynamical system. Moreover, due to the structure of the quadratic Casimir operator of the nilradical, these algebras contain a maximal non-abelian quasi-classical Lie algebra of dimension 2n - 1, indicating that gauge theories (with ghosts) are possible on these subalgebras. %~