let X, Y be set ; :: thesis: for C being non empty set
for V being RealNormSpace
for f1, f2 being PartFunc of C,V st f1 is_bounded_on X & f2 | Y is constant holds
f1 + f2 is_bounded_on X /\ Y
let C be non empty set ; :: thesis: for V being RealNormSpace
for f1, f2 being PartFunc of C,V st f1 is_bounded_on X & f2 | Y is constant holds
f1 + f2 is_bounded_on X /\ Y
let V be RealNormSpace; :: thesis: for f1, f2 being PartFunc of C,V st f1 is_bounded_on X & f2 | Y is constant holds
f1 + f2 is_bounded_on X /\ Y
let f1, f2 be PartFunc of C,V; :: thesis: ( f1 is_bounded_on X & f2 | Y is constant implies f1 + f2 is_bounded_on X /\ Y )
assume that
A1: f1 is_bounded_on X and
A2: f2 | Y is constant ; :: thesis: f1 + f2 is_bounded_on X /\ Y
f2 is_bounded_on Y by A2, Th54;
hence f1 + f2 is_bounded_on X /\ Y by A1, Th46; :: thesis: verum