>>14403403To add to this guy, each one of these fundamental products correspond to the one of the areas, into which three sets divide U.
That's why I mentioned DNF, fundamental products are similar to the conjuncts in the full DNF. The only difference that instead of variables being true or false in that conjunct, here, you can say, that some element belongs to some sets in a intersection (indicated by set) and doesn't belong to some others (indicated by set's complement).
For example, A and B intersection can be defined by fundamental product
