Definition:Topological Manifold with Boundary/Interior

Definition

Let $M$ be a $n$-dimensional topological manifold with boundary.

The interior of $M$, denoted $\Int M$, is the set of all its interior points.

Sources

• 2013: John M. Lee: Introduction to Smooth Manifolds (2nd ed.): Chapter $1$: Smooth Manifolds: $\S$ Manifolds with Boundary