List questions from differential-topology

Published on 13 Apr 2026 - 0:19

177

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Is this a trivial Stokes exercise?

Published on 12 Apr 2026 - 21:32

1.4k

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Torus with positive sectional curvature.

Published on 09 Apr 2026 - 20:25

254

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Extending a $C^2$-function from a $C^{1,1}$-curve to some neighbourhood

Published on 16 Apr 2026 - 2:23

392

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Does a diffeomorphism between the interiors of two manifolds extend to the manifolds?

Published on 11 Apr 2026 - 8:23

1.6k

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Proof that cone not diffeomorphic to plane

Published on 13 Apr 2026 - 13:16

674

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Different definitions of handle attachment

Published on 11 Apr 2026 - 7:07

1.1k

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Stiefel-Whitney numbers for product bundle

Published on 10 Apr 2026 - 9:02

2.8k

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Prove not a violation of Stokes theorem

Published on 11 Apr 2026 - 22:23

166

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Reference Request: Smoothness Structure on a Set

Published on 13 Apr 2026 - 3:32

1k

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On the smooth structure of $\mathbb{R}P^n$ in Milnor's book on characteristic classes.

Published on 15 Apr 2026 - 11:15

71

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Topological degree of a map with finite energy

Published on 10 Apr 2026 - 2:15

653

Views

Smoothing corners of a handle attachment

Published on 13 Apr 2026 - 2:55

329

Views

Relations between elliptic curves and topological quantum field theory

Published on 10 May 2026 - 17:13

139

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Question about Lie Groups

Published on 11 Apr 2026 - 7:16

List Question

Immersing punctured torus

Is this a trivial Stokes exercise?

Torus with positive sectional curvature.

Extending a $C^2$-function from a $C^{1,1}$-curve to some neighbourhood

Does a diffeomorphism between the interiors of two manifolds extend to the manifolds?

Proof that cone not diffeomorphic to plane

Different definitions of handle attachment

Stiefel-Whitney numbers for product bundle

Prove not a violation of Stokes theorem

Reference Request: Smoothness Structure on a Set

On the smooth structure of $\mathbb{R}P^n$ in Milnor's book on characteristic classes.

Topological degree of a map with finite energy

Smoothing corners of a handle attachment

Relations between elliptic curves and topological quantum field theory

Question about Lie Groups

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