List questions from differential-topology

Published on 01 Feb 2019 - 17:28

188

Views

Symmetric bilinear from $(d^2g)_x$ is well-defined on $\text{Ker}(dg)_x \subset T_xM$?

Published on 04 Feb 2019 - 5:11

186

Views

Understanding what smoothness means

Published on 26 Mar 2026 - 16:57

111

Views

An example of smooth but not Riemannian

Published on 28 Mar 2026 - 17:41

192

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Local triviality for the fiber bundles

Published on 25 Mar 2026 - 16:02

44

Views

Intersection number via tangent spaces

Published on 25 Mar 2026 - 9:22

309

Views

Elementary reference for existence of a tubular neighborhood of a $C^2$-curve (or elementary proof)?

Published on 26 Mar 2026 - 19:20

723

Views

Euler characteristic expression in terms the number of fixed points of an $\mathbb{S}^1$ action

Published on 26 Mar 2026 - 6:06

242

Views

If $n>m$, then the spheres $S^n$ and $S^m$ are not homeomorphic?

Published on 06 Feb 2019 - 17:46

72

Views

General tips for showing that subspaces "vary continuously"

Published on 26 Mar 2026 - 14:18

40

Views

A relatively open subset of $\partial \Omega$ with a relative boundary.

Published on 07 Feb 2019 - 17:58

321

Views

Is the Hairy Ball Theorem equivalent to saying that the Hopf Fibration has no global sections?

Published on 27 Mar 2026 - 17:20

72

Views

Piecewise linear structure as generators of $C(M)$

Published on 25 Mar 2026 - 11:10

11

Views

A definition for a regular subset of $\partial \Omega$

Published on 08 Feb 2019 - 16:30

567

Views

Question about critical point of function on compact manifold

Published on 25 Mar 2026 - 6:11

List Question

Smooth Manifolds: Charts or Parametrizations?

Symmetric bilinear from $(d^2g)_x$ is well-defined on $\text{Ker}(dg)_x \subset T_xM$?

Understanding what smoothness means

An example of smooth but not Riemannian

Local triviality for the fiber bundles

Intersection number via tangent spaces

Elementary reference for existence of a tubular neighborhood of a $C^2$-curve (or elementary proof)?

Euler characteristic expression in terms the number of fixed points of an $\mathbb{S}^1$ action

If $n>m$, then the spheres $S^n$ and $S^m$ are not homeomorphic?

General tips for showing that subspaces "vary continuously"

A relatively open subset of $\partial \Omega$ with a relative boundary.

Is the Hairy Ball Theorem equivalent to saying that the Hopf Fibration has no global sections?

Piecewise linear structure as generators of $C(M)$

A definition for a regular subset of $\partial \Omega$

Question about critical point of function on compact manifold

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