reserve p,q for Rational;
reserve g,m,m1,m2,n,n1,n2 for Nat;
reserve i,i1,i2,j,j1,j2 for Integer;
reserve R for Ring, F for Field;

theorem
for f being Homomorphism of F_Rat,F_Rat holds f = id F_Rat
proof
let f be Homomorphism of F_Rat,F_Rat;
id F_Rat = canHom_Rat F_Rat by Th98;
hence thesis by Th98;
end;
