List questions from differential-topology

Published on 07 Apr 2018 - 6:35

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How are topological invariants obtained from TQFTs used in practice?

Published on 22 Mar 2026 - 22:52

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Formula for wedge product

Published on 24 Mar 2026 - 22:10

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Proving that the cone is not a smooth manifold

Published on 09 Apr 2018 - 0:19

474

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$S^3 \times S^1$ is not a symplectic manifold?

Published on 09 Apr 2018 - 11:34

141

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Relationship between Haefliger structures and principal $\Gamma^q$-bundles

Published on 09 Apr 2018 - 17:40

82

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On the flow of $v(x,y)=(x,y)$ and the Lefschetz number

Published on 09 Apr 2018 - 18:11

115

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Integral Identities

Published on 25 Mar 2026 - 14:09

128

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Definition of the tangent bundle in Guillemin and Pollack

Published on 24 Mar 2026 - 23:46

106

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A curve tangent to a vector field

Published on 09 Apr 2018 - 23:21

685

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Tangent space to the image of a vector field

Published on 10 Apr 2018 - 1:03

47

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Does this define a smooth map?

Published on 10 Apr 2018 - 5:57

93

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Neighbourhood of a point in Stiefel manifold

Published on 23 Mar 2026 - 1:02

292

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Show that at a zero $x$, the derivative $dv_x:T_x(X)\rightarrow \mathbb{R}^N$ actually carries $T_x(X)$ into itself.

Published on 11 Apr 2018 - 20:05

197

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About a regular value of a manifold with boundary

Published on 25 Mar 2026 - 7:43

List Question

Schematic view of (co)homology.

How are topological invariants obtained from TQFTs used in practice?

Formula for wedge product

Proving that the cone is not a smooth manifold

$S^3 \times S^1$ is not a symplectic manifold?

Relationship between Haefliger structures and principal $\Gamma^q$-bundles

On the flow of $v(x,y)=(x,y)$ and the Lefschetz number

Integral Identities

Definition of the tangent bundle in Guillemin and Pollack

A curve tangent to a vector field

Tangent space to the image of a vector field

Does this define a smooth map?

Neighbourhood of a point in Stiefel manifold

Show that at a zero $x$, the derivative $dv_x:T_x(X)\rightarrow \mathbb{R}^N$ actually carries $T_x(X)$ into itself.

About a regular value of a manifold with boundary

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