theorem :: JORDAN5B:23

for f being FinSequence of (TOP-REAL 2)
for p, q being Point of (TOP-REAL 2) st p <> f . (len f) & p in L~ f & q in L~ f & f is being_S-Seq & not p in L~ (L_Cut (f,q)) holds
q in L~ (L_Cut (f,p))