reserve i,j,k,n,m for Nat;
reserve p,q for Point of TOP-REAL 2;
reserve G for Go-board;
reserve C for Subset of TOP-REAL 2;

theorem Th40:
  for f being rectangular special_circular_sequence, p being Point
of TOP-REAL 2 st W-bound L~f > p`1 or p`1 > E-bound L~f or S-bound L~f > p`2 or
  p`2 > N-bound L~f holds p in LeftComp f
proof
  let f be rectangular special_circular_sequence, p be Point of TOP-REAL 2;
  LeftComp f = {q : not(W-bound L~f <= q`1 & q`1 <= E-bound L~f & S-bound
  L~f <= q`2 & q`2 <= N-bound L~f)} by Th37;
  hence thesis;
end;
