$\mathbb{CP}^2$ realizable as boundary of compact smooth $5$-manifold?
44955
Can $\mathbb CP^n$ be the boundary of a compact manifold?
135126
Proving that the quotient manifold is orientable if and only if the group action is orientation-preserving
149593
Global sections of a tensor product of vector bundles on a smooth manifold
151581
Prerequisite for Milnor Topology from a Differential Viewpoint
101860
Relating the normal bundle and trivial bundles of $S^n$ to the tautological and trivial line bundles of $\mathbb{R}P^n$
133413
Proof of paracompactness of CW-complexes (J. Lee, Introduction to Topological Manifolds)
148685
Equivalences of definitions of submanifolds in $\mathbb{R^n}$
9457
Compact Lie group bi-invariant metric
128410
Showing that the set of fixed points is a smooth manifold
92504
Criteria of a trivial G bundle of a 3-manifold
96887
Dimension of isometry group of complete connected Riemannian manifold
59697
Is the boundary of the unit sphere in every normed vector space compact?
37092
Homeomorphism between a cone in a compact space and this compactification
156382
Why is Compactification restricted to Toroids, Calabi-Yau et al?
24828
surjective immersion $\mathbb{R}^2 \to \mathbb{R}^2$ which is not a diffeomorphism
68234
Is $[0,1) \cup \{2\}$ a manifold with boundary? My issue is the $2$.
21198
Proving that the general linear group is a differentiable manifold