let X be set ; :: thesis: for n being Nat
for r being Real
for f being Function of X,(TOP-REAL n) holds f [+] r is Function of X,(TOP-REAL n)
let n be Nat; :: thesis: for r being Real
for f being Function of X,(TOP-REAL n) holds f [+] r is Function of X,(TOP-REAL n)
let r be Real; :: thesis: for f being Function of X,(TOP-REAL n) holds f [+] r is Function of X,(TOP-REAL n)
let f be Function of X,(TOP-REAL n); :: thesis: f [+] r is Function of X,(TOP-REAL n)
set h = f [+] r;
dom f = X by FUNCT_2:def 1;
then A1: dom (f [+] r) = X by VALUED_2:def 37;
for x being object st x in X holds
(f [+] r) . x in the carrier of (TOP-REAL n)

proof

let x be object ; :: thesis: ( x in X implies (f [+] r) . x in the carrier of (TOP-REAL n) )
assume A2: x in X ; :: thesis: (f [+] r) . x in the carrier of (TOP-REAL n)
then reconsider X = X as non empty set ;
reconsider x = x as Element of X by A2;
reconsider f = f as Function of X,(TOP-REAL n) ;
A3: (f . x) + r = (f . x) + r ;
(f [+] r) . x = (f . x) + r by A1, VALUED_2:def 37;
hence (f [+] r) . x in the carrier of (TOP-REAL n) by A3; :: thesis: verum

end;

hence f [+] r is Function of X,(TOP-REAL n) by A1, FUNCT_2:3; :: thesis: verum