
theorem NC0:
  Newton_Coeff 0 = <*1*>
  proof
    len (Newton_Coeff 0) = 0 + 1 by NEWTON:def 5; then
    dom (Newton_Coeff 0) = Seg 1 & (Newton_Coeff 0).1 = 1 by FINSEQ_1:def 3;
    hence thesis;
  end;
