
theorem Th4: :: EvenOdd03:
  for n,m being odd Integer st m < n holds m+2 <= n
proof
  let n,m be odd Integer;
  assume m < n;
  then m+1 <= n by INT_1:7;
  then m+1 < n by XXREAL_0:1;
  then m+1+1 <= n by INT_1:7;
  hence thesis;
end;
