A bijective function or bijection is a function that is both injective and surjective.
The set of all bijections from a set $X$ onto a set $Y$ is denoted by
\[\bij(X, Y).\]
Note. A bijection is also known as one-to-one correspondence.
A bijective function or bijection is a function that is both injective and surjective.
The set of all bijections from a set $X$ onto a set $Y$ is denoted by
\[\bij(X, Y).\]
Note. A bijection is also known as one-to-one correspondence.