theorem Th34:
for
p1,
p2,
p3,
p4 being
Point of
(TOP-REAL 2) for
a,
b,
c,
d being
Real st
a < b &
c < d &
p1 `2 = d &
p2 `2 = d &
p3 `2 = d &
p4 `2 = d &
a <= p1 `1 &
p1 `1 < p2 `1 &
p2 `1 < p3 `1 &
p3 `1 < p4 `1 &
p4 `1 <= b holds
p1,
p2,
p3,
p4 are_in_this_order_on rectangle (
a,
b,
c,
d)