For example:
The symbol used for the intersection of two sets is '∩'. Therefore, symbolically, we write intersection of the two sets A and B is A B which means A intersection B.
The union of two sets is a new set that contains all of the elements that are in at least one of the two sets. The union is written as AB or A or B . The intersection of two sets is a new set that contains all of the elements that are in both sets. The intersection is written as AB or A and B .