List questions from differential-topology

Published on 29 Mar 2026 - 4:11

34

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Interior point of closed curve on triangular lattice with maximum curvature

Published on 11 Apr 2026 - 5:27

61

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Complement of low dimension subsets and higher homotopy group

Published on 25 Mar 2026 - 6:02

106

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What does $C^1([0,1])$ mean?

Published on 30 Apr 2023 - 14:28

47

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What does the set $\{z \in W: |z| < i, d(z,\mathbb{R}^n-W) > 1/i \}$ mean in partition of unity?

Published on 30 Apr 2023 - 22:45

108

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Reference request: When is the set of critical values of $f : \mathbb{R}^n \mapsto \mathbb{R}^m$ a countable set?

Published on 02 May 2023 - 14:23

32

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Locally preservation of coordinate systems

Published on 09 Apr 2026 - 13:18

44

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Embedded torus on $S^3$ in $\mathbb{R}^3$

Published on 11 Apr 2026 - 18:53

236

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Give an example of a diffeomorphism between $\{ (x, y) \in \mathbb R^2: 1 < x^2 +y^2 < 2, x < y < 2x \}$ and a square

Published on 26 Mar 2026 - 4:53

41

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Joining the edges of a disc in a way that prevents mirroring

Published on 26 Mar 2026 - 4:53

92

Views

The space $\mathrm{Diff}_0(M)$ of all diffeomorphisms of $(M,g)$ in the same component as the identity

Published on 04 May 2023 - 3:04

38

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Associated groupoid of $SO(3)$ double cover

Published on 06 May 2023 - 2:09

69

Views

Geodesics and antipodal identification

Published on 10 Apr 2026 - 5:20

166

Views

Proving $\theta$ is zero if and only if $\theta X=0$

Published on 06 May 2023 - 17:24

26

Views

Copy-pasting cycles on the double manifold makes cycle even?

Published on 09 May 2023 - 15:08

List Question

Can I extend a $C^1$ function?

Interior point of closed curve on triangular lattice with maximum curvature

Complement of low dimension subsets and higher homotopy group

What does $C^1([0,1])$ mean?

What does the set $\{z \in W: |z| < i, d(z,\mathbb{R}^n-W) > 1/i \}$ mean in partition of unity?

Reference request: When is the set of critical values of $f : \mathbb{R}^n \mapsto \mathbb{R}^m$ a countable set?

Locally preservation of coordinate systems

Embedded torus on $S^3$ in $\mathbb{R}^3$

Give an example of a diffeomorphism between $\{ (x, y) \in \mathbb R^2: 1 < x^2 +y^2 < 2, x < y < 2x \}$ and a square

Joining the edges of a disc in a way that prevents mirroring

The space $\mathrm{Diff}_0(M)$ of all diffeomorphisms of $(M,g)$ in the same component as the identity

Associated groupoid of $SO(3)$ double cover

Geodesics and antipodal identification

Proving $\theta$ is zero if and only if $\theta X=0$

Copy-pasting cycles on the double manifold makes cycle even?

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