Complement, Union & Intersection

Royal Wedding (Union) of Prince Harry & Meghan Markle

Union (∪)

The union of two sets is like a marriage between a bride and a groom. They are joined in holy union and all their belongings are moved into their new apartment.

In set theory, if A = {1, 2, 3} and B = {2, 3, 4}

then A B = {1, 2, 3, 4}. All the elements from A is combined with all the elements from B (with no repeats)

Intersection (∩)

The intersection of 2 sets is like the messy part of a divorce. It refers to elements that both sets have in common.

In set theory, if A = {1, 2, 3} and B = {2, 3, 4}

then A B = {2, 3}.