let X be non empty compact TopSpace; :: thesis: for F, G, H being Point of (R_Normed_Algebra_of_ContinuousFunctions X)
for f, g, h being RealMap of X st f = F & g = G & h = H holds
( H = F + G iff for x being Element of X holds h . x = (f . x) + (g . x) )
let F, G, H be Point of (R_Normed_Algebra_of_ContinuousFunctions X); :: thesis: for f, g, h being RealMap of X st f = F & g = G & h = H holds
( H = F + G iff for x being Element of X holds h . x = (f . x) + (g . x) )
let f, g, h be RealMap of X; :: thesis: ( f = F & g = G & h = H implies ( H = F + G iff for x being Element of X holds h . x = (f . x) + (g . x) ) )
reconsider f1 = F, g1 = G, h1 = H as VECTOR of (R_Algebra_of_ContinuousFunctions X) ;
( H = F + G iff h1 = f1 + g1 ) ;
hence ( f = F & g = G & h = H implies ( H = F + G iff for x being Element of X holds h . x = (f . x) + (g . x) ) ) by Th3; :: thesis: verum