Question

Two Different Statements of Van Kampen

score 93 · Answer 1 · 2022-07-25 20:05:46

93

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Two Different Statements of Van Kampen

Published on 25 Jul 2022 - 20:05

score 43 · Answer 2 · 2022-07-28 10:55:18

43

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fundamental group of complement of curve in $\mathbb{R}^4$

Published on 28 Jul 2022 - 10:55

score 72 · Answer 3 · 2022-07-29 17:29:52

72

Views

Fundamental group of a manifold of dimension 4

Published on 29 Jul 2022 - 17:29

score 227 · Answer 4 · 2026-02-23 18:47:12

227

Views

Fundamental group of the boundary of a torus with a point removed

Published on 23 Feb 2026 - 18:47

score 139 · Answer 5 · 2022-08-03 15:31:42

139

Views

Find a basis of the Homology group $H_1(M_4)$ of a orientable closed surface $M_4$ of genus 4 in terms of certain curves.

Published on 03 Aug 2022 - 15:31

score 104 · Answer 6 · 2026-03-30 05:13:27

104

Views

Doubt about two different approach to compute the fundamental group of closed orientable surface collapsed to a separating curve

Published on 30 Mar 2026 - 5:13

score 42 · Answer 7 · 2022-08-17 20:25:30

42

Views

How to prove that $S^2-\{x_1,x_2,...,x_{2n}\} $ as a deformation retract of $\mathbb{R}^3 -X ?$

Published on 17 Aug 2022 - 20:25

score 129 · Answer 8 · 2022-08-19 19:55:27

129

Views

Difference between $S^1 \vee S^1$ and $S^1 / \sim$

Published on 19 Aug 2022 - 19:55

score 55 · Answer 9 · 2026-03-27 00:06:03

55

Views

Galoisian and abelian covering of elliptic curve ramified only above one point

Published on 27 Mar 2026 - 0:06

score 82 · Answer 10 · 2022-08-21 19:18:35

82

Views

Is the fundamental group of a compact surface finitely generated?

Published on 21 Aug 2022 - 19:18

score 62 · Answer 11 · 2026-02-23 20:42:27

62

Views

Compute the fundamental group of the real projective plane $\mathbb R\mathbb P^2$ minus a point $p$

Published on 23 Feb 2026 - 20:42

score 47 · Answer 12 · 2022-09-03 02:27:16

47

Views

homotopic curves seen in $C(S^1,X)$ imply homotopic curves seen as closed paths $C([0,1],X)$

Published on 03 Sep 2022 - 2:27

score 64 · Answer 13 · 2022-09-04 16:56:58

64

Views

Fundamental group of a space obtained from identifying pairs of points

Published on 04 Sep 2022 - 16:56

score 119 · Answer 14 · 2022-09-05 22:58:59

119

Views

Proof of Van Kampen’s theorem

Published on 05 Sep 2022 - 22:58

score 421 · Answer 15 · 2026-04-05 21:48:05

421

Views

Fundamental group of Möbius strip using Van Kampen

Published on 05 Apr 2026 - 21:48

List Question

Two Different Statements of Van Kampen

fundamental group of complement of curve in $\mathbb{R}^4$

Fundamental group of a manifold of dimension 4

Fundamental group of the boundary of a torus with a point removed

Find a basis of the Homology group $H_1(M_4)$ of a orientable closed surface $M_4$ of genus 4 in terms of certain curves.

Doubt about two different approach to compute the fundamental group of closed orientable surface collapsed to a separating curve

How to prove that $S^2-\{x_1,x_2,...,x_{2n}\} $ as a deformation retract of $\mathbb{R}^3 -X ?$

Difference between $S^1 \vee S^1$ and $S^1 / \sim$

Galoisian and abelian covering of elliptic curve ramified only above one point

Is the fundamental group of a compact surface finitely generated?

Compute the fundamental group of the real projective plane $\mathbb R\mathbb P^2$ minus a point $p$

homotopic curves seen in $C(S^1,X)$ imply homotopic curves seen as closed paths $C([0,1],X)$

Fundamental group of a space obtained from identifying pairs of points

Proof of Van Kampen’s theorem

Fundamental group of Möbius strip using Van Kampen

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