I have a doubt it may be stupid though.
know that if ∑m (1,3,5,6) then its equivalent POS form is = πM (0,2,4,7)
But my doubt is say i need to represent 7, in SOP i write ABC in POS i write (A'+B'+C')
∑m (1,3,5,6) = A'B'C + A'BC+AB'C+ABC'
if i take complement of it = Duality + complement every literal then it becomes :
(A+B+C')(A+B'+C')(A'+B+C')(A'+B'+C) = πM(1,3,5,6)
then why we say that SOP is complement of POS and why ∑m (1,3,5,6) != πM(1,3,5,6) ? as according to above they seems to be equal.