# Definition:Interior (Complex Analysis)

*This page is about the interior of a subset of the complex plane. For other uses, see Definition:Interior.*

## Definition

Let $H \subseteq \C$ be a subset of the complex plane.

The **interior of $H$** is the subset of $H$ which consists of the interior points of $H$.

## Also defined as

Some sources define the **interior** only in the context of a region in the complex plane.