List questions from manifolds

Published on 25 Mar 2026 - 9:23

27

Views

Show there are basis vectors such that $Dg(a)(e_{j_k})$ spans $\mathbb{R}^p$

Published on 21 May 2019 - 18:15

105

Views

Homology of the complement of a compact subset inside ball

Published on 21 May 2019 - 19:39

98

Views

Can U(N) be endowed with a symplectic structure?

Published on 26 Mar 2026 - 9:16

739

Views

Derivative of a tangent bundle projection

Published on 22 May 2019 - 16:30

35

Views

Show $\{(r\cos \alpha,r\sin \alpha):r=\frac{6}{1-2\cos \alpha)}\}$ is the image of $\phi(t)=(-4+2\cosh(t),2\sqrt{3}\sinh(t))$

Published on 29 Mar 2026 - 13:24

463

Views

Can an injective smooth map from a smooth manifold into another smooth manifold have a discontinuous inverse?

Published on 23 May 2019 - 1:23

34

Views

Going from local to global definition in proving sets are manifolds

Published on 23 May 2019 - 9:35

26

Views

Does there exist an open neighborhood $U$ of $S$ and a smooth map $U\to S$ which is a retraction?

Published on 25 Mar 2026 - 6:07

192

Views

Finding all integral curves to $x^2 \partial_x + y \partial_y$

Published on 27 Mar 2026 - 13:39

97

Views

Nonvanishing form in $\Omega^3(O(3))$

Published on 26 Mar 2026 - 12:47

85

Views

Lie Groups Homomrphism Question (Tangent Space)

Published on 25 Mar 2026 - 11:10

116

Views

On Properly Discontinuous Groups

Published on 30 Mar 2026 - 22:55

134

Views

Tangent Bundle of $TO(n)$

Published on 25 Mar 2026 - 4:39

78

Views

Normals of an implicit surface

Published on 25 Mar 2026 - 14:20

List Question

Solving PDE produced for $C^1$ isometric embedding and its complexity analysis

Show there are basis vectors such that $Dg(a)(e_{j_k})$ spans $\mathbb{R}^p$

Homology of the complement of a compact subset inside ball

Can U(N) be endowed with a symplectic structure?

Derivative of a tangent bundle projection

Show $\{(r\cos \alpha,r\sin \alpha):r=\frac{6}{1-2\cos \alpha)}\}$ is the image of $\phi(t)=(-4+2\cosh(t),2\sqrt{3}\sinh(t))$

Can an injective smooth map from a smooth manifold into another smooth manifold have a discontinuous inverse?

Going from local to global definition in proving sets are manifolds

Does there exist an open neighborhood $U$ of $S$ and a smooth map $U\to S$ which is a retraction?

Finding all integral curves to $x^2 \partial_x + y \partial_y$

Nonvanishing form in $\Omega^3(O(3))$

Lie Groups Homomrphism Question (Tangent Space)

On Properly Discontinuous Groups

Tangent Bundle of $TO(n)$

Normals of an implicit surface

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