theorem Th24: :: JGRAPH_3:24

for P, Kb being Subset of (TOP-REAL 2)
for f being Function of ((TOP-REAL 2) | Kb),((TOP-REAL 2) | P) st Kb = { q where q is Point of (TOP-REAL 2) : ( ( - 1 = q `1 & - 1 <= q `2 & q `2 <= 1 ) or ( q `1 = 1 & - 1 <= q `2 & q `2 <= 1 ) or ( - 1 = q `2 & - 1 <= q `1 & q `1 <= 1 ) or ( 1 = q `2 & - 1 <= q `1 & q `1 <= 1 ) ) } & f is being_homeomorphism holds
P is being_simple_closed_curve