Injective.md (257B)
1 # Injective 2 3 L2 4 5 **Definition:** For a function to be injective each value in the domain must map to a unique value in the codomain. 6 7 Sometimes called one-to-one because there is one y for each x. 8 9 For any y in Y there is at most one x such that f(x) = y.