List questions from differential-topology

Published on 11 Jul 2018 - 23:36

116

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$w_3(G)$ of a principal $G$ bundle over some 4-manifold $X_4$

Published on 25 Mar 2026 - 9:39

644

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Boil down the formal definition of Euler class

Published on 25 Mar 2026 - 7:42

83

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Relating Euler class to other characteristic classes

Published on 25 Mar 2026 - 7:39

1.2k

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Whitney sum formula and Euler class

Published on 25 Mar 2026 - 7:39

1.8k

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Classifying space $B$SU(n)

Published on 21 Mar 2026 - 21:53

418

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Stiefel Whitney class for closed 3-manifolds

Published on 25 Mar 2026 - 7:42

312

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When is a Brieskorn manifold diffeomorphic to an exotic sphere?

Published on 14 Jul 2018 - 2:19

1.3k

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Eilenberg–MacLane space $K(\mathbb{Z}_2,n)$

Published on 20 Mar 2026 - 5:45

501

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Group Action of $SO(3)$ on unit sphere

Published on 25 Mar 2026 - 15:47

28

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How to prove $p\in S^1$ s.t., $d_p(f|_{S^1})=0$

Published on 15 Jul 2018 - 8:17

151

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Computing derivative in second tangent bundle

Published on 25 Mar 2026 - 1:13

959

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Turning tangent theorem

Published on 15 Jul 2018 - 22:55

60

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Final step of homotopy lemma

Published on 16 Jul 2018 - 13:53

7.9k

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A continuous, nowhere differentiable but invertible function?

Published on 16 Jul 2018 - 17:31

List Question

Bump function on a differentiable manifold.

$w_3(G)$ of a principal $G$ bundle over some 4-manifold $X_4$

Boil down the formal definition of Euler class

Relating Euler class to other characteristic classes

Whitney sum formula and Euler class

Classifying space $B$SU(n)

Stiefel Whitney class for closed 3-manifolds

When is a Brieskorn manifold diffeomorphic to an exotic sphere?

Eilenberg–MacLane space $K(\mathbb{Z}_2,n)$

Group Action of $SO(3)$ on unit sphere

How to prove $p\in S^1$ s.t., $d_p(f|_{S^1})=0$

Computing derivative in second tangent bundle

Turning tangent theorem

Final step of homotopy lemma

A continuous, nowhere differentiable but invertible function?

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