Contents

# Contents

## Definition

Given a subset $A$ of a topological space $X$, a point $x \in A$ is an interior point of $A$ it it is contained in the interior of $A$, hence if $A$ is a neighborhood of $x$ in $X$, i.e., if there is some open subset containing $x$ that is included in $A$.

Last revised on May 9, 2017 at 13:10:28. See the history of this page for a list of all contributions to it.