# Domain of a Function

## Domain of a Function

The set of values for which a function is defined.

### Example

The domain of the function $$f : \mathbb{N} → \mathbb{Q}\space | \space f(x) = \dfrac{1}{x}$$ is $$\mathbb{N} \setminus 0$$.

Therefore: dom(f) = $$\mathbb{N}^{*}$$.