theorem
  cocf(r).0 = scf(r).0
proof
  thus cocf(r).0 = c_n(r).0 * ((c_d(r))").0 by SEQ_1:8
    .=c_n(r).0 * (c_d(r).0)" by VALUED_1:10
    .=c_n(r).0 *(1/c_d(r).0)
    .=c_n(r).0 /c_d(r).0
    .=(scf(r)).0 / c_d(r).0 by Def5
    .=(scf(r)).0 / 1 by Def6
    .=scf(r).0;
end;
