Understanding the definition of manifolds with boundary
90092
Showing that $\bar{\mathbb{B}}^n$ is a manifold with boundary (Lee ITM Probelm 3-4)
78624
CW complexes and manifolds
63098
Properly discontinuous actions and discrete groups in complete Riemannian manifolds.
135126
Proving that the quotient manifold is orientable if and only if the group action is orientation-preserving
128410
Showing that the set of fixed points is a smooth manifold
13964
Manifold of Density Matrices
80418
The "Easiest" non-smoothable manifold
44955
Can $\mathbb CP^n$ be the boundary of a compact manifold?
72602
Why is important for a manifold to have countable basis?
135108
Why doesn't $ds^2 = 0$ imply two distinct points $p$ and $p'$ on a manifold are the same point?
50150
Precise definition of the boundary set
71791
Smooth structure of embedded submanifolds
53809
Continuous map of differentiable manifolds is differentiable if differentiable functions pull back to differentiable functions
122352
Topologies in a Riemannian Manifold
21198
Proving that the general linear group is a differentiable manifold
55089
Basis of the space of vector fields on smooth manifolds
64835
Intuitive interpretation of the Laplacian