theorem :: SPRECT_3:21

for f, g being FinSequence of (TOP-REAL 2) st f is being_S-Seq & g is being_S-Seq & ( (f /. (len f)) `1 = (g /. 1) `1 or (f /. (len f)) `2 = (g /. 1) `2 ) & L~ f misses L~ g & (LSeg ((f /. (len f)),(g /. 1))) /\ (L~ f) = {(f /. (len f))} & (LSeg ((f /. (len f)),(g /. 1))) /\ (L~ g) = {(g /. 1)} holds
f ^ g is being_S-Seq