reserve a,b,c,d,m,x,n,j,k,l for Nat,
  t,u,v,z for Integer,
  f,F for FinSequence of NAT;
reserve p,q,r,s for real number;
reserve a,b,c,d,m,x,n,k,l for Nat,
  t,z for Integer,
  f,F,G for FinSequence of REAL;
reserve q,r,s for real number;
reserve D for set;

theorem
  (Newton_Coeff n) is FinSequence of NAT
proof
  for k st k in dom(Newton_Coeff n) holds (Newton_Coeff n).k in NAT;
  hence thesis by FINSEQ_2:12;
end;
