Subject: First-year university - Mathematical Proofs
Name: Damaris
Who are you: Student

A function that is injective but not surjective where f: N-->N

Thanks so much!

Hi Damaris.

Are you just looking for an example of such a function? How about f(n) = 2n? That is injective, but not surjective and the domain and codomain are both N.

Stephen La Rocque.>