... >> Mathematics >> Set Theory >> One To One Function
One To One Function
Definition: A one-to-one function F: X -> Y is one with the property that if F(x) = F(z) then x = z. That is, for each member of y in Y there is at most one x in X such that F(x) = y.
Example: For example the function n^2 on the natural numbers is one-to-one.