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 Th25:
  for f being non constant standard special_circular_sequence
  holds RightComp f misses L~f
proof
  let f be non constant standard special_circular_sequence;
  (L~f)` =LeftComp f \/ RightComp f by GOBRD12:10;
  then RightComp f c= (L~f)` by XBOOLE_1:7;
  hence thesis by SUBSET_1:23;
end;
