Question

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

score 1.2k · Answer 1 · 2026-04-29 12:51:43

1.2k

Views

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

Published on 29 Apr 2026 - 12:51

score 392 · Answer 2 · 2026-04-13 22:32:57

392

Views

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

Published on 13 Apr 2026 - 22:32

score 101 · Answer 3 · 2026-04-15 08:21:51

101

Views

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

Published on 15 Apr 2026 - 8:21

score 48 · Answer 4 · 2026-04-15 23:39:38

48

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 15 Apr 2026 - 23:39

score 645 · Answer 5 · 2026-04-29 12:44:27

645

Views

When does conservative imply faithful for functors?

Published on 29 Apr 2026 - 12:44

score 116 · Answer 6 · 2026-04-14 21:28:58

116

Views

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

Published on 14 Apr 2026 - 21:28

score 724 · Answer 7 · 2026-04-11 23:28:31

724

Views

Fundamental group of infinite row of tori

Published on 11 Apr 2026 - 23:28

score 366 · Answer 8 · 2026-04-12 06:20:10

366

Views

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

Published on 12 Apr 2026 - 6:20

score 114 · Answer 9 · 2026-04-15 06:01:24

114

Views

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

Published on 15 Apr 2026 - 6:01

score 118 · Answer 10 · 2026-04-11 13:36:46

118

Views

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

Published on 11 Apr 2026 - 13:36

score 1k · Answer 11 · 2026-04-09 11:02:03

1k

Views

Fundamental groups (isomorphism)

Published on 09 Apr 2026 - 11:02

score 520 · Answer 12 · 2026-04-13 10:48:30

520

Views

Fundamental group of a triangle with edges identified

Published on 13 Apr 2026 - 10:48

score 887 · Answer 13 · 2026-04-13 06:26:32

887

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 13 Apr 2026 - 6:26

score 856 · Answer 14 · 2026-04-14 14:41:36

856

Views

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

Published on 14 Apr 2026 - 14:41

score 60 · Answer 15 · 2026-04-14 11:49:11

60

Views

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

Published on 14 Apr 2026 - 11:49

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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