and are called injections (or injective functions). With this terminology, a bijection is a function which is both a surjection and an injection, or using other words, a bijection is a function which is both "one-to-one" and "onto".

Examples

Every map from the empty set to itself is a bijection.

Batting line-up of a baseball or cricket team

Consider the batting line-up of a baseball

1.Previous
3.Next