reserve X for set;
reserve a,b,c,k,m,n for Nat;
reserve i,j for Integer;
reserve r,s for Real;
reserve p,p1,p2,p3 for Prime;
reserve z for Complex;

theorem
  m <= n implies Fermat m <= Fermat n
  proof
    assume m <= n;
    then m < n or m = n by XXREAL_0:1;
    hence thesis by Th30;
  end;
