theorem :: JORDAN6:26

for P being Subset of (TOP-REAL 2)
for p1, p2, q1, q2 being Point of (TOP-REAL 2) holds Segment (P,p1,p2,q1,q2) = { q where q is Point of (TOP-REAL 2) : ( LE q1,q,P,p1,p2 & LE q,q2,P,p1,p2 ) }