List questions from differential-topology

Published on 26 Apr 2026 - 14:33

649

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Poincare lemma for compact vertical supports in Bott & Tu

Published on 12 Apr 2026 - 8:25

2.7k

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Restriction of an $n$-form to a submanifold

Published on 14 Apr 2026 - 1:44

172

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$1$-forms $\omega$ on $S^1$ are the differential of functions provided $\int_{S_1}\omega=0$

Published on 13 Apr 2026 - 18:00

1.1k

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What is the relationship between diffeomorphisms of the sphere modulo isotopy and exotic spheres?

Published on 03 Apr 2026 - 12:55

217

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Explicit verification of signs in Morse complex

Published on 26 Mar 2026 - 11:06

69

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Looking for two non diffeotopic embeddings $\mathbb{R}\rightarrow\mathbb{R}$

Published on 16 Apr 2026 - 14:57

1.2k

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On the proof of that fixed point set of an involution is a submanifold

Published on 14 Apr 2026 - 8:37

232

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Relation between tangent spaces of (un)stable manifolds in Morse theory

Published on 26 Mar 2026 - 12:38

52

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There is no smooth map from $R^3$ to $R$ such that there i

Published on 14 Apr 2026 - 3:49

105

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Why $h$ has zero topological degree?

Published on 09 Apr 2026 - 7:24

881

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Proper map and manifolds

Published on 25 Mar 2026 - 20:33

525

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What is the topological degree of the constant map?

Published on 11 Apr 2026 - 19:01

66

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Proving that an $E$-oriented manifold has an $E$-oriented normal bundle

Published on 27 Mar 2026 - 5:34

39

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Can I conclude $s$ is a submersion from these data?

Published on 12 Apr 2026 - 19:27

List Question

Inversion of Sphere

Poincare lemma for compact vertical supports in Bott & Tu

Restriction of an $n$-form to a submanifold

$1$-forms $\omega$ on $S^1$ are the differential of functions provided $\int_{S_1}\omega=0$

What is the relationship between diffeomorphisms of the sphere modulo isotopy and exotic spheres?

Explicit verification of signs in Morse complex

Looking for two non diffeotopic embeddings $\mathbb{R}\rightarrow\mathbb{R}$

On the proof of that fixed point set of an involution is a submanifold

Relation between tangent spaces of (un)stable manifolds in Morse theory

There is no smooth map from $R^3$ to $R$ such that there i

Why $h$ has zero topological degree?

Proper map and manifolds

What is the topological degree of the constant map?

Proving that an $E$-oriented manifold has an $E$-oriented normal bundle

Can I conclude $s$ is a submersion from these data?

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