let p be Point of (TOP-REAL 2); :: thesis: for r being real number holds
( (r * p) `1 = r * (p `1) & (r * p) `2 = r * (p `2) )
let r be real number ; :: thesis: ( (r * p) `1 = r * (p `1) & (r * p) `2 = r * (p `2) )
r * p = |[(r * (p `1)),(r * (p `2))]| by EUCLID:61;
hence ( (r * p) `1 = r * (p `1) & (r * p) `2 = r * (p `2) ) by EUCLID:56; :: thesis: verum