List questions from differential-topology

35

Views

Let $G$ act smoothly on $M$, $(g,m) \rightarrow t_g (m) $ from the left. Why is $t_g \simeq id $ if $G$ connected?

Published on 25 Mar 2026 - 13:13

117

Views

Some differential geometry questions

Published on 10 Apr 2026 - 3:56

88

Views

Gluck twists for higher genus surfaces

Published on 10 Apr 2026 - 23:28

675

Views

Guillemin's $\epsilon$-neighbor-theorem: Why does $\pi$ map to the closest point in Y?

Published on 16 Apr 2026 - 7:57

99

Views

A four dimensional mapping Torus Parallelizable?

Published on 26 Mar 2026 - 6:02

169

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What if $m<n$ in Preimage Theorem?

Published on 14 Apr 2026 - 16:44

450

Views

Show that for smooth manifolds $X$ and $Y$, $T[X \times Y]_{(x, y)} = TX_x \times TY_y$

Published on 16 Apr 2026 - 4:10

75

Views

Number of points with unbounded curvature...

Published on 15 Apr 2026 - 18:38

816

Views

$RP^2$ as a boundary of a 3-manifold

Published on 10 Apr 2026 - 11:12

200

Views

the Intersection of smooth curves can be countable but not finite set?

Published on 13 Apr 2026 - 20:04

1k

Views

Confusion about the index and degree of vector fields

Published on 05 May 2026 - 6:38

120

Views

Where may I find information regarding quantitative aspects of diffeomorphism?

Published on 16 Apr 2026 - 21:29

198

Views

Is the support of the differential of a k-form a subset of the support of the k-form?

Published on 13 Apr 2026 - 7:15

540

Views

There are finitely many critical points for a non-degenerate action.

Published on 12 Apr 2026 - 8:22

35

Views

Find the points in $\mathbb{RP}^2$ where $F$ doesn't have rank $2$

Published on 16 Apr 2026 - 2:41

List Question

Let $G$ act smoothly on $M$, $(g,m) \rightarrow t_g (m) $ from the left. Why is $t_g \simeq id $ if $G$ connected?

Some differential geometry questions

Gluck twists for higher genus surfaces

Guillemin's $\epsilon$-neighbor-theorem: Why does $\pi$ map to the closest point in Y?

A four dimensional mapping Torus Parallelizable?

What if $m<n$ in Preimage Theorem?

Show that for smooth manifolds $X$ and $Y$, $T[X \times Y]_{(x, y)} = TX_x \times TY_y$

Number of points with unbounded curvature...

$RP^2$ as a boundary of a 3-manifold

the Intersection of smooth curves can be countable but not finite set?

Confusion about the index and degree of vector fields

Where may I find information regarding quantitative aspects of diffeomorphism?

Is the support of the differential of a k-form a subset of the support of the k-form?

There are finitely many critical points for a non-degenerate action.

Find the points in $\mathbb{RP}^2$ where $F$ doesn't have rank $2$

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