Compact manifold without boundary is boundary of another manifold
136592
Examples of manifolds that are not boundaries
155794
Are the complements of two homeomorphic compact, connected subsets of $\mathbb{R}^2$ homeomorphic?
143254
Closed ball not a manifold.
143929
dimension of a connected Manifold
66770
Intuition for Smooth Manifolds
96887
Dimension of isometry group of complete connected Riemannian manifold
6227
Showing diffeomorphism between $S^1 \subset \mathbb{R}^2$ and $\mathbb{RP}^1$
99230
If a manifold M has zero Euler characteristic, there is a non-vanishing vector field on it
61255
Tangent bundle : is a manifold
95234
Quasi-components in compact space
109027
example of a non differentiable manifold
147914
Closed image of locally compact space
95897
Which sets occur as boundaries of other sets in topological spaces?
106298
Prove that some topology is not metrizable
63098
Properly discontinuous actions and discrete groups in complete Riemannian manifolds.
135025
Axiomatization of a Topology using the Boundary
107148
Does there always exist a continuous/smooth map from $\mathbb{R}^n$ onto a manifold $M^n$?