theorem :: JORDAN23:44

for f being non empty FinSequence of (TOP-REAL 2)
for p, q being Point of (TOP-REAL 2) st f is almost-one-to-one & f is special & f is unfolded & f is s.n.c. & len f <> 2 & p in L~ f & q in L~ f & p <> q & p <> f . 1 & q <> f . 1 holds
B_Cut (f,p,q) is being_S-Seq