/sci/ - Science & Math

That isn't how functions are defined.
A function is a set of pairs (x,y).
In other words, the object A is a function if and only if
>for all p <- A, there exist r,s such that p = (r,s)
OP, you're tilting at windmills.
Go to /lit/ and tell the fine folks there that you want some advice as if you were a character in a Don Quixote novel.