List questions from differential-topology

Published on 30 Jun 2019 - 13:29

96

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Proving this 1-manifold is the Hopf link

Published on 25 Mar 2026 - 17:37

348

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$\omega=-ydx+xdy $ is a left-invariant $1$-form on $S^1$

Published on 28 Mar 2026 - 23:58

61

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Reference for proof of Rigid Topological Theorem

Published on 30 Mar 2026 - 14:18

239

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Is there algebraic content to the clutching construction on a sphere?

Published on 25 Mar 2026 - 20:42

215

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A natural section of the Etale space

Published on 27 Mar 2026 - 7:49

162

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Smooth Map $f: S^k \to \mathbb{R}^n$ Extends to the Disc

Published on 04 Jul 2019 - 20:01

114

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Why do Guillemin and Pollack avoid the term "submanifold with boundary"?

Published on 25 Mar 2026 - 7:41

62

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component of the covariant derivative is a tensor

Published on 25 Mar 2026 - 4:39

563

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Isolatedness of critical points of Morse functions

Published on 08 Jul 2019 - 23:36

124

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Taming $\mathbb{R}$-diffeomorphisms

Published on 27 Mar 2026 - 10:16

115

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Compute the fundamental group of the union of 2 cubes joined at one corner and otherwise disjoint.

Published on 25 Mar 2026 - 17:42

177

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What does $\nabla^j$ mean in Riemannian geometry?

Published on 30 Mar 2026 - 17:37

572

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On a submanifold, every differential form can be extended to an open set containing the submanifold.

Published on 27 Mar 2026 - 3:59

42

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The space of $k$ differential forms as a Fréchet space

Published on 10 Jul 2019 - 14:27

List Question

Showing the projection map is a submersion.

Proving this 1-manifold is the Hopf link

$\omega=-ydx+xdy $ is a left-invariant $1$-form on $S^1$

Reference for proof of Rigid Topological Theorem

Is there algebraic content to the clutching construction on a sphere?

A natural section of the Etale space

Smooth Map $f: S^k \to \mathbb{R}^n$ Extends to the Disc

Why do Guillemin and Pollack avoid the term "submanifold with boundary"?

component of the covariant derivative is a tensor

Isolatedness of critical points of Morse functions

Taming $\mathbb{R}$-diffeomorphisms

Compute the fundamental group of the union of 2 cubes joined at one corner and otherwise disjoint.

What does $\nabla^j$ mean in Riemannian geometry?

On a submanifold, every differential form can be extended to an open set containing the submanifold.

The space of $k$ differential forms as a Fréchet space

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