Lie algebras MOC Graded Lie algebra Let (π, +) be a (necessarily abelian) monoid. A π-graded Lie algebra is an example of a graded algebra, lie i.e. [π΄πΌ,π΄π½]βπ΄πΌ+π½ Properties Universal enveloping algebra of a graded Lie algebra Category of graded Lie algebras See Category of graded Lie algebras. See also Graded structure tidy | en | SemBr