theorem Th16: :: JGRAPH_2:16

for D being Subset of (TOP-REAL 2)
for K0 being Subset of ((TOP-REAL 2) | D) st K0 = { p where p is Point of (TOP-REAL 2) : ( ( ( p `1 <= p `2 & - (p `2) <= p `1 ) or ( p `1 >= p `2 & p `1 <= - (p `2) ) ) & p <> 0. (TOP-REAL 2) ) } holds
rng (Out_In_Sq | K0) c= the carrier of (((TOP-REAL 2) | D) | K0)