# Definition:Interior (Complex Analysis)

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*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.