Non-Injective differentiable map between manifolds
86993
Differentiable injective function betweem manifolds
106736
Poincaré maps and interpretation
94165
Why is a map to a smaller dimensional space not injective?
55089
Basis of the space of vector fields on smooth manifolds
157742
Prove that $U(n)$ is a manifold
6227
Showing diffeomorphism between $S^1 \subset \mathbb{R}^2$ and $\mathbb{RP}^1$
93669
Is every embedded submanifold globally a level set?
151637
How do we prove that this set is not manifold?
72115
Why isn't there a continuously differentiable surjection from $I \to I \times I$?
78344
Nonconstant linear functional on a topological vector space is an open mapping
31561
Is there a Smooth Real Manifold which is not a Riemannian Manifold?
93986
Connectivity, Path Connectivity and Differentiability
136592
Examples of manifolds that are not boundaries
46923
Differentiable Sequences
21198
Proving that the general linear group is a differentiable manifold
10215
Differentiable manifolds as locally ringed spaces
11319
Is $M=\{(x,|x|): x \in (-1, 1)\}$ not a differentiable manifold?