theorem Th32: :: FVSUM_1:32

for i being Nat
for K being non empty addLoopStr
for a1, a2 being Element of K
for p1, p2 being FinSequence of the carrier of K st i in dom (p1 - p2) & a1 = p1 . i & a2 = p2 . i holds
(p1 - p2) . i = a1 - a2