Question

Reference Request: Spectral Sequence Relating Bredon and Borel Equivariant Cohomology.

score 157 · Answer 1 · 2026-03-25 11:30:57

157

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Reference Request: Spectral Sequence Relating Bredon and Borel Equivariant Cohomology.

Published on 25 Mar 2026 - 11:30

score 121 · Answer 2 · 2018-04-29 14:10:38

121

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Calculate $\operatorname{Ext}(\mathbb{Z}/n,\mathbb{Z}/m)$ for $n,m \geq 2$.

Published on 29 Apr 2018 - 14:10

score 70 · Answer 3 · 2026-03-25 09:39:42

70

Views

Classify, except isomorphism, all the associated covering spaces of $3$ sheets on $\mathbb{S}^1\times\mathbb{S}^1$. Do the same for the

Published on 25 Mar 2026 - 9:39

score 184 · Answer 4 · 2026-03-22 16:27:34

184

Views

On the retract of product of two spaces

Published on 22 Mar 2026 - 16:27

score 1k · Answer 5 · 2018-04-30 13:58:44

1k

Views

Show that every map $S^n \to S^n$ can be homotoped to have a fixed point if $n > 0$.

Published on 30 Apr 2018 - 13:58

score 136 · Answer 6 · 2026-03-25 00:07:40

136

Views

Is the type of a knot dependent on the space in which it is embedded or not?

Published on 25 Mar 2026 - 0:07

score 1.1k · Answer 7 · 2026-03-25 09:38:47

1.1k

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Find the universal covering of $\mathbb{R}P^2\vee\mathbb{R}P^2$

Published on 25 Mar 2026 - 9:38

score 537 · Answer 8 · 2018-04-30 21:44:33

537

Views

Star convex subset $A$ of $\mathbb{R}^n$ is simply connected

Published on 30 Apr 2018 - 21:44

score 232 · Answer 9 · 2026-03-25 09:43:11

232

Views

Show that if $X$ is homotopically equivalent to $Y$, then $\widetilde{X}$ is homotopically equivalent to $\widetilde{Y}$

Published on 25 Mar 2026 - 9:43

score 731 · Answer 10 · 2018-05-01 04:08:21

731

Views

How to show that the space 'line with two origins' is path connected?

Published on 01 May 2018 - 4:08

score 59 · Answer 11 · 2018-05-01 04:41:20

59

Views

Is it true that $[\overline{g\alpha}] = [\bar{g}\bar{\alpha}]$?

Published on 01 May 2018 - 4:41

score 150 · Answer 12 · 2026-03-25 11:06:32

150

Views

Action of a degree $m$ map on $\pi_{n+1}S^n$

Published on 25 Mar 2026 - 11:06

score 163 · Answer 13 · 2026-03-25 20:00:21

163

Views

Spaces homotopy dominated by a Moore space

Published on 25 Mar 2026 - 20:00

score 216 · Answer 14 · 2018-05-01 22:10:26

216

Views

Proving the Kernel is a free group

Published on 01 May 2018 - 22:10

score 674 · Answer 15 · 2026-02-23 06:37:55

674

Views

Geometric Proof of Perron-Frobenius

Published on 23 Feb 2026 - 6:37

List Question

Reference Request: Spectral Sequence Relating Bredon and Borel Equivariant Cohomology.

Calculate $\operatorname{Ext}(\mathbb{Z}/n,\mathbb{Z}/m)$ for $n,m \geq 2$.

Classify, except isomorphism, all the associated covering spaces of $3$ sheets on $\mathbb{S}^1\times\mathbb{S}^1$. Do the same for the

On the retract of product of two spaces

Show that every map $S^n \to S^n$ can be homotoped to have a fixed point if $n > 0$.

Is the type of a knot dependent on the space in which it is embedded or not?

Find the universal covering of $\mathbb{R}P^2\vee\mathbb{R}P^2$

Star convex subset $A$ of $\mathbb{R}^n$ is simply connected

Show that if $X$ is homotopically equivalent to $Y$, then $\widetilde{X}$ is homotopically equivalent to $\widetilde{Y}$

How to show that the space 'line with two origins' is path connected?

Is it true that $[\overline{g\alpha}] = [\bar{g}\bar{\alpha}]$?

Action of a degree $m$ map on $\pi_{n+1}S^n$

Spaces homotopy dominated by a Moore space

Proving the Kernel is a free group

Geometric Proof of Perron-Frobenius

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