Definition:Partial Function

From ProofWiki
Jump to: navigation, search

Definition

Let $S \subset \N^k$.

Let $f: S \to \N$ be a function.


Suppose that $\forall x \in \N^k \setminus S$, $f$ is undefined at $x$.

Then $f$ is known as a partial function from $\N^k$ to $\N$.


Thus we can specify a function that has values for some, but not all, elements of $\N$.


It can be seen that the definition of a partial function as given here is compatible with that of a partial mapping.


Also see