theorem
  for p being Point of TOP-REAL 2 ex q being Point of TOP-REAL 2 st q`1
  < W-bound D & p <> q
proof
  let p be Point of TOP-REAL 2;
  take q = |[W-bound D - 1, p`2 - 1]|;
  W-bound D - 1 < W-bound D - 0 by XREAL_1:15;
  hence q`1 < W-bound D;
  thus thesis;
end;
