theorem Th11: :: JGRAPH_5:11

for f, g being Function of I[01],(TOP-REAL 2)
for a, b, c, d being Real
for O, I being Point of I[01] st O = 0 & I = 1 & f is continuous & f is one-to-one & g is continuous & g is one-to-one & a <> b & c <> d & (f . O) `1 = a & c <= (f . O) `2 & (f . O) `2 <= d & (f . I) `1 = b & c <= (f . I) `2 & (f . I) `2 <= d & (g . O) `2 = c & a <= (g . O) `1 & (g . O) `1 <= b & (g . I) `2 = d & a <= (g . I) `1 & (g . I) `1 <= b & ( for r being Point of I[01] holds
( ( a >= (f . r) `1 or (f . r) `1 >= b or c >= (f . r) `2 or (f . r) `2 >= d ) & ( a >= (g . r) `1 or (g . r) `1 >= b or c >= (g . r) `2 or (g . r) `2 >= d ) ) ) holds
rng f meets rng g