A function $f$, from domain $A$ to codomain $B$, is denoted $f: A \rightarrow B$, is an assignment of each element of $A$ to exactly one element of $B$
A function $f$, from domain $A$ to codomain $B$, is denoted $f: A \rightarrow B$, is an assignment of each element of $A$ to exactly one element of $B$