List questions from differential-topology

Published on 24 Mar 2026 - 23:45

157

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Poincare lemma or its converse?

Published on 23 Jan 2019 - 16:29

107

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Mayer-Vietoris for twisted De Rham cohomology in Bott-Tu Differential Forms in Algebraic Topology

Published on 23 Jan 2019 - 21:04

96

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The action of the group $\Gamma=\mathbb{Z}$ on the manifold $\mathbb{C}^n-\{0\}$

Published on 25 Mar 2026 - 16:13

94

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Publications in differential geometry

Published on 27 Mar 2026 - 5:24

55

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The expression of points near a critical point

Published on 26 Jan 2019 - 4:14

53

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Definition of fibration from a compact Kahler manifold to a compact complex curve

Published on 25 Mar 2026 - 16:02

390

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Mobius strip with constant negative curvature

Published on 25 Mar 2026 - 6:01

2.2k

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Why is the two sheeted cone not a regular surface?

Published on 27 Jan 2019 - 0:37

1.2k

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Proving the No Retraction Theorem

Published on 27 Jan 2019 - 18:23

126

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Homotopy fibers and preimages of regular values.

Published on 27 Jan 2019 - 19:15

200

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Is there a name for this 'path' derivative operator?

Published on 27 Jan 2019 - 21:38

79

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Negative Tight Contact Structures on $S^3$

Published on 27 Mar 2026 - 17:00

77

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$\int_{T_pM}\phi\ dx = \int_M \lambda^{-d}\phi(\lambda^{-1}\exp_p^{-1}(\cdot))\ dV_g$?

Published on 28 Mar 2026 - 12:31

83

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$\exp_q^{-1}(\exp_p(tX)) = \exp_q^{-1}(p)+t\Gamma_{p\to q}(X)+O(t^2)$ as $t\to 0$?

Published on 28 Mar 2026 - 14:19

List Question

What "given a foliation $f:L \to M$ " means?

Poincare lemma or its converse?

Mayer-Vietoris for twisted De Rham cohomology in Bott-Tu Differential Forms in Algebraic Topology

The action of the group $\Gamma=\mathbb{Z}$ on the manifold $\mathbb{C}^n-\{0\}$

Publications in differential geometry

The expression of points near a critical point

Definition of fibration from a compact Kahler manifold to a compact complex curve

Mobius strip with constant negative curvature

Why is the two sheeted cone not a regular surface?

Proving the No Retraction Theorem

Homotopy fibers and preimages of regular values.

Is there a name for this 'path' derivative operator?

Negative Tight Contact Structures on $S^3$

$\int_{T_pM}\phi\ dx = \int_M \lambda^{-d}\phi(\lambda^{-1}\exp_p^{-1}(\cdot))\ dV_g$?

$\exp_q^{-1}(\exp_p(tX)) = \exp_q^{-1}(p)+t\Gamma_{p\to q}(X)+O(t^2)$ as $t\to 0$?

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