let X be non empty TopSpace; :: thesis: for f1, f2 being Function of X,R^1 st f1 is continuous & f2 is continuous & ( for q being Point of X holds f2 . q <> 0 ) holds
ex g being Function of X,R^1 st
( ( for p being Point of X
for r1, r2 being real number st f1 . p = r1 & f2 . p = r2 holds
g . p = (r1 / r2) ^2 ) & g is continuous )
let f1, f2 be Function of X,R^1 ; :: thesis: ( f1 is continuous & f2 is continuous & ( for q being Point of X holds f2 . q <> 0 ) implies ex g being Function of X,R^1 st
( ( for p being Point of X
for r1, r2 being real number st f1 . p = r1 & f2 . p = r2 holds
g . p = (r1 / r2) ^2 ) & g is continuous ) )
assume ( f1 is continuous & f2 is continuous & ( for q being Point of X holds f2 . q <> 0 ) ) ; :: thesis: ex g being Function of X,R^1 st
( ( for p being Point of X
for r1, r2 being real number st f1 . p = r1 & f2 . p = r2 holds
g . p = (r1 / r2) ^2 ) & g is continuous )
then consider g2 being Function of X,R^1 such that
A1: for p being Point of X
for r1, r2 being real number st f1 . p = r1 & f2 . p = r2 holds
g2 . p = r1 / r2 and
A2: g2 is continuous by JGRAPH_2:37;
consider g3 being Function of X,R^1 such that
A3: for p being Point of X
for r1 being real number st g2 . p = r1 holds
g3 . p = r1 * r1 and
A4: g3 is continuous by A2, JGRAPH_2:32;
for p being Point of X
for r1, r2 being real number st f1 . p = r1 & f2 . p = r2 holds
g3 . p = (r1 / r2) ^2

proof

let p be Point of X; :: thesis: for r1, r2 being real number st f1 . p = r1 & f2 . p = r2 holds
g3 . p = (r1 / r2) ^2
let r1, r2 be real number ; :: thesis: ( f1 . p = r1 & f2 . p = r2 implies g3 . p = (r1 / r2) ^2 )
assume ( f1 . p = r1 & f2 . p = r2 ) ; :: thesis: g3 . p = (r1 / r2) ^2
then g2 . p = r1 / r2 by A1;
hence g3 . p = (r1 / r2) ^2 by A3; :: thesis: verum

end;

hence ex g being Function of X,R^1 st
( ( for p being Point of X
for r1, r2 being real number st f1 . p = r1 & f2 . p = r2 holds
g . p = (r1 / r2) ^2 ) & g is continuous ) by A4; :: thesis: verum