LieAlgebraMap + LieAlgebraMap -- addition of Lie homomorphisms

Description

The symbol + is used as infix notation for the addition of Lie homomorphisms.

 i1 : M = lieAlgebra{a,b} o1 = M o1 : LieAlgebra i2 : L = lieAlgebra{a,b} o2 = L o2 : LieAlgebra i3 : f = map(L,M,{a,b}) o3 = f o3 : LieAlgebraMap i4 : g = map(L,M,{b,a}) o4 = g o4 : LieAlgebraMap i5 : describe(f+g) o5 = a => a + b b => a + b source => M target => L