d=innerDerivation(u)
i1 : L = lieAlgebra{a,b} o1 = L o1 : LieAlgebra
i2 : d=innerDerivation a a b o2 = d o2 : LieDerivation
i3 : describe d o3 = a => - (a a b a) b => - (b a b a) map => id_L sign => 0 weight => {3, 0} source => L target => L
i4 : a (a a b) o4 = - (a a b a) o4 : L
i5 : b (a a b) o5 = - (b a b a) o5 : L
The object innerDerivation is a method function.