How can the intersection of two sets be found?

In set theory, the intersection of two sets, denoted by the symbol $\cap$, is the set containing all elements that are members of both sets simultaneously.1

To find the intersection of two sets, $A$ and $B$, you identify every element that appears in both collections. For example, if set $A=\{1,2,3,4,5\}$ and set $B=\{1,3,5,7,9\}$, the intersection $A\cap B$ consists of the elements $\{1,3,5\}$, as these are the only values present in both sets.1