
theorem LmSign1D:
  for i being Nat holds power(F_Real).(-1_F_Real,i) in F_Rat
  proof
    let i be Nat;
    power(F_Real).(-1_F_Real,i)*1.F_Real = power(F_Rat).(-1_F_Rat,i)*1.F_Rat
    by ZMATRLIN43;
    hence thesis;
  end;
