List questions from algebraic-topology

Published on 23 Mar 2026 - 13:27

585

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Is $S^{n-1}$ a deformation retract of $S^{n}$ \ {$k$ points}?

Published on 22 Mar 2026 - 10:29

172

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Open subset of Euclidean space can't have non-spherical manifold compactification.

Published on 24 Mar 2026 - 22:13

695

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Fixed points of simplicial maps

Published on 22 Mar 2026 - 8:38

164

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Degree of maps on the sphere in spherical coordinates

Published on 21 Jan 2018 - 22:47

272

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Degree of the continuous map $S^1 \times S^1 \rightarrow S^2$.

Published on 22 Jan 2018 - 15:22

329

Views

Algebraic geometry and algebraic topology used in string theory

Published on 22 Mar 2026 - 7:23

899

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Fundamental group of common Klein bottle immersion

Published on 22 Jan 2018 - 18:02

322

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Computing the homology of $\mathbb{S}^1$ attached with two $2$-cells via degree $2$ and $3$

Published on 22 Jan 2018 - 19:51

153

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Is an order two homeomorphism of $S^{1}$ orientation reversing?

Published on 22 Jan 2018 - 21:34

86

Views

Homology union three subspaces.

Published on 17 Mar 2026 - 0:12

401

Views

Determining Left Adjoint of Forgetful Functor from $\tau_{*}$ to $\tau$

Published on 23 Mar 2026 - 8:57

410

Views

CW structure on the quotient of group action

Published on 23 Jan 2018 - 5:46

518

Views

Connection between Mayer-Vietoris and higher dimensional Seifert-Van Kampen Theorems

Published on 22 Mar 2026 - 9:11

152

Views

Monodromy representations and geodesics of singular flat metrics on $\mathbb{H}$

Published on 20 Mar 2026 - 15:42

List Question

Homologically zero circles in smooth manifolds

Is $S^{n-1}$ a deformation retract of $S^{n}$ \ {$k$ points}?

Open subset of Euclidean space can't have non-spherical manifold compactification.

Fixed points of simplicial maps

Degree of maps on the sphere in spherical coordinates

Degree of the continuous map $S^1 \times S^1 \rightarrow S^2$.

Algebraic geometry and algebraic topology used in string theory

Fundamental group of common Klein bottle immersion

Computing the homology of $\mathbb{S}^1$ attached with two $2$-cells via degree $2$ and $3$

Is an order two homeomorphism of $S^{1}$ orientation reversing?

Homology union three subspaces.

Determining Left Adjoint of Forgetful Functor from $\tau_{*}$ to $\tau$

CW structure on the quotient of group action

Connection between Mayer-Vietoris and higher dimensional Seifert-Van Kampen Theorems

Monodromy representations and geodesics of singular flat metrics on $\mathbb{H}$

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