List questions from differential-topology

Published on 17 Apr 2026 - 1:17

233

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Orientation of disconnected manifolds

Published on 11 Apr 2026 - 21:12

122

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Question about using Sard's theorem in Whitney's weak embedding theorem

Published on 14 Apr 2026 - 8:11

101

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Characterizing the smooth maps $f : M\to N$ such that $E = \{(x, y)\in M\times M : f(x) = f(y)\}$ is a smooth submanifold of $M\times M$.

Published on 16 Apr 2026 - 12:20

43

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Lie algebra of the $\mathop{Spin}(4)$ group as 2-forms on tangent bundle

Published on 16 May 2026 - 7:10

215

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Is a gravitational singularity distinct from a topological hole?

Published on 13 Apr 2026 - 9:44

119

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Induced map on cohomology is preimage in geometry

Published on 09 Apr 2026 - 13:57

145

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Milnor's Lectures on h-cobordism theorem: Lemma 6.2

Published on 10 May 2026 - 18:43

274

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Bundle Morphism which is a diffeomorphism on fibres is a diffeomorphism

Published on 15 Jul 2021 - 9:14

98

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Definition of pull-back in gauge transformation

Published on 15 May 2026 - 15:36

414

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Stability of transversality

Published on 11 May 2026 - 7:38

88

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Quasicoherent sheaves over manfiolds

Published on 26 Mar 2026 - 17:52

224

Views

"Parametric" versus "Non-parametric" hypersurface

Published on 16 Apr 2026 - 7:18

270

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Proving $S^1$ is not simply connected without the fundamental group machinery

Published on 12 Apr 2026 - 19:30

67

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If $X \simeq S^n$, then $X- \mathring{D^n} \simeq S^n - \mathring{D^n}$ for an $n$-manifold $X$

Published on 16 Apr 2026 - 18:27

List Question

Proof of Smale Theorem (Audin-Damian), Lemma 2.2.8

Orientation of disconnected manifolds

Question about using Sard's theorem in Whitney's weak embedding theorem

Characterizing the smooth maps $f : M\to N$ such that $E = \{(x, y)\in M\times M : f(x) = f(y)\}$ is a smooth submanifold of $M\times M$.

Lie algebra of the $\mathop{Spin}(4)$ group as 2-forms on tangent bundle

Is a gravitational singularity distinct from a topological hole?

Induced map on cohomology is preimage in geometry

Milnor's Lectures on h-cobordism theorem: Lemma 6.2

Bundle Morphism which is a diffeomorphism on fibres is a diffeomorphism

Definition of pull-back in gauge transformation

Stability of transversality

Quasicoherent sheaves over manfiolds

"Parametric" versus "Non-parametric" hypersurface

Proving $S^1$ is not simply connected without the fundamental group machinery

If $X \simeq S^n$, then $X- \mathring{D^n} \simeq S^n - \mathring{D^n}$ for an $n$-manifold $X$

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