Question

CW complex with fundamental group $\Bbb Z/n$

score 1.1k · Answer 1 · 2026-03-23 06:48:53

1.1k

Views

CW complex with fundamental group $\Bbb Z/n$

Published on 23 Mar 2026 - 6:48

score 389 · Answer 2 · 2018-04-05 16:55:06

389

Views

For $n \ge 3$, is $\mathbb R^n \setminus A$ simply connected for any countable set $A$?

Published on 05 Apr 2018 - 16:55

score 99 · Answer 3 · 2018-04-05 17:08:33

99

Views

Simple connected ness of $\mathbb R^n$ minus a compact line segment , for $n \ge 3$

Published on 05 Apr 2018 - 17:08

score 45 · Answer 4 · 2018-04-05 18:20:51

45

Views

For a vector subspace $W$ of $\mathbb R^n$, where $n \ge 4$ and $\dim W\le n-3$, is $\mathbb R^n\setminus W $ simply connected?

Published on 05 Apr 2018 - 18:20

score 640 · Answer 5 · 2026-03-25 00:02:21

640

Views

When does conservative imply faithful for functors?

Published on 25 Mar 2026 - 0:02

score 114 · Answer 6 · 2026-03-25 07:53:26

114

Views

On the quotient space $X^n/S_n$, for a Hausdorff, contractible, locally path connected topological space $X$

Published on 25 Mar 2026 - 7:53

score 721 · Answer 7 · 2026-03-22 14:05:10

721

Views

Fundamental group of infinite row of tori

Published on 22 Mar 2026 - 14:05

score 363 · Answer 8 · 2018-04-14 14:29:22

363

Views

Spaces with fundamental group isomorphic to a free group with $(n-1)$ generators

Published on 14 Apr 2018 - 14:29

score 112 · Answer 9 · 2018-04-15 03:42:18

112

Views

Show that if $n>1$, every continuous map $f:\mathbb{S}^n\to \mathbb{S}^1$ is nulhomotopic

Published on 15 Apr 2018 - 3:42

score 115 · Answer 10 · 2018-04-15 07:53:58

115

Views

Fundamental group of $\mathbb{C}^2\setminus \Delta?$

Published on 15 Apr 2018 - 7:53

score 1k · Answer 11 · 2026-03-22 02:06:10

1k

Views

Fundamental groups (isomorphism)

Published on 22 Mar 2026 - 2:06

score 517 · Answer 12 · 2026-03-22 14:04:58

517

Views

Fundamental group of a triangle with edges identified

Published on 22 Mar 2026 - 14:04

score 884 · Answer 13 · 2018-04-17 02:57:25

884

Views

Find a covering space of $T$ corresponding to the subgroup of $\mathbb{Z}\times\mathbb{Z}$ generated by the element $m\times 0$

Published on 17 Apr 2018 - 2:57

score 854 · Answer 14 · 2018-04-18 01:48:56

854

Views

Use Van Kampen Theorem to find the fundamental group of a circle $S^1$ joining a sphere $S^2$

Published on 18 Apr 2018 - 1:48

score 57 · Answer 15 · 2018-04-18 18:55:10

57

Views

If i rotate a shape over a tangent line does this act maintain the fundamental group?

Published on 18 Apr 2018 - 18:55

List Question

CW complex with fundamental group $\Bbb Z/n$

For $n \ge 3$, is $\mathbb R^n \setminus A$ simply connected for any countable set $A$?

Simple connected ness of $\mathbb R^n$ minus a compact line segment , for $n \ge 3$

For a vector subspace $W$ of $\mathbb R^n$, where $n \ge 4$ and $\dim W\le n-3$, is $\mathbb R^n\setminus W $ simply connected?

When does conservative imply faithful for functors?

On the quotient space $X^n/S_n$, for a Hausdorff, contractible, locally path connected topological space $X$

Fundamental group of infinite row of tori

Spaces with fundamental group isomorphic to a free group with $(n-1)$ generators

Show that if $n>1$, every continuous map $f:\mathbb{S}^n\to \mathbb{S}^1$ is nulhomotopic

Fundamental group of $\mathbb{C}^2\setminus \Delta?$

Fundamental groups (isomorphism)

Fundamental group of a triangle with edges identified

Find a covering space of $T$ corresponding to the subgroup of $\mathbb{Z}\times\mathbb{Z}$ generated by the element $m\times 0$

Use Van Kampen Theorem to find the fundamental group of a circle $S^1$ joining a sphere $S^2$

If i rotate a shape over a tangent line does this act maintain the fundamental group?

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