:: deftheorem Def1 defines ComplexFuncAdd CFUNCDOM:def 1 :
for A being set
for b₂ being BinOp of (Funcs (A,COMPLEX)) holds
( b₂ = ComplexFuncAdd A iff for f, g being Element of Funcs (A,COMPLEX) holds b₂ . (f,g) = addcomplex .: (f,g) );