List questions from differential-topology

Published on 12 Apr 2026 - 4:54

7.8k

Views

What is the codimension of matrices of rank $r$ as a manifold?

Published on 15 Apr 2026 - 12:54

665

Views

Why isn't the graph of $y=|x|$ a smooth manifold?

Published on 16 Apr 2026 - 6:02

54

Views

Does the structure group of S^n homotopic to O(n+1)?

Published on 12 Apr 2026 - 19:07

151

Views

What dimensions are possible for contours of smooth non-constant $\mathbb R^n\to\mathbb R$ functions?

Published on 26 Mar 2026 - 17:32

457

Views

Compact manifolds can almost be immersed?

Published on 09 Apr 2026 - 1:55

105

Views

Prove a $T_0$ topological group is $T_1$

Published on 15 Apr 2026 - 0:46

1.2k

Views

Why is the priemage of a regular value of $F(x,v)=df_x(v)$ finite?

Published on 15 Apr 2026 - 7:28

406

Views

Stokes' Theorem for the upper half space.

Published on 13 Apr 2026 - 14:25

2.4k

Views

Distinguishing the Cylinder from a "full-twist" Möbius strip

Published on 13 Apr 2026 - 15:37

417

Views

First Pontryagin class on real Grassmannian manifold?

Published on 14 Apr 2026 - 14:46

1.7k

Views

Finding Reeb Vector Field Associated with a Contact Form

Published on 13 Apr 2026 - 7:17

1.2k

Views

Surgery on trivial knots

Published on 05 Apr 2026 - 19:53

127

Views

The Hopf invariant with coefficients other than Z.

Published on 13 Apr 2026 - 5:59

654

Views

Tubular neighbourhood theorem

Published on 10 Apr 2026 - 18:43

List Question

Rotating about the z-axis defines a smooth function on $S^{2}$

What is the codimension of matrices of rank $r$ as a manifold?

Why isn't the graph of $y=|x|$ a smooth manifold?

Does the structure group of S^n homotopic to O(n+1)?

What dimensions are possible for contours of smooth non-constant $\mathbb R^n\to\mathbb R$ functions?

Compact manifolds can almost be immersed?

Prove a $T_0$ topological group is $T_1$

Why is the priemage of a regular value of $F(x,v)=df_x(v)$ finite?

Stokes' Theorem for the upper half space.

Distinguishing the Cylinder from a "full-twist" Möbius strip

First Pontryagin class on real Grassmannian manifold?

Finding Reeb Vector Field Associated with a Contact Form

Surgery on trivial knots

The Hopf invariant with coefficients other than Z.

Tubular neighbourhood theorem

Trending Questions

Popular # Hahtags

Popular Questions