let f, g be Function of I[01] ,R^1 ; :: thesis: ( ( for x being Point of holds f . x = r * x ) & ( for x being Point of holds g . x = r * x ) implies f = g )
assume that
A2: for x being Point of holds f . x = r * x and
A3: for x being Point of holds g . x = r * x ; :: thesis: f = g
for x being Point of holds f . x = g . x

proof

let x be Point of ; :: thesis: f . x = g . x
thus f . x = r * x by A2
.= g . x by A3 ; :: thesis: verum

end;

hence f = g by FUNCT_2:113; :: thesis: verum