DeMorgan’s second law is about the complement of the intersection of sets.
Complement of the intersection of sets
If we want to take the complement of a set defined in terms of set intersections, DeMorgan’s second laws a way to do that. For any arbitrary sets A and B, if we want to compute (A∩B), it isn’t equal to A∩B. We can demonstrate this fact with the help of an example.
Let us take some sets to make a concrete example. We assume that U={0,1,2,3,4,5,6,7,8,9}, A={2,3,4,5,6}, and B={1,3,5,7}. From this information, we can derive the following:
A∩B={3,5}
A= ...