Question

The direct sum of any family of objects

score 169 · Answer 1 · 2026-05-14 21:11:34

169

Views

The direct sum of any family of objects

Published on 14 May 2026 - 21:11

score 48 · Answer 2 · 2026-05-10 14:06:51

48

Views

Thom spectrum $MSpin$ and $E_2$-page for a large degree $i\geq 8$

Published on 10 May 2026 - 14:06

score 939 · Answer 3 · 2026-04-14 05:44:23

939

Views

Linking number and cup product

Published on 14 Apr 2026 - 5:44

score 167 · Answer 4 · 2026-05-10 11:16:47

167

Views

When compactly supported cohomology ring is zero?

Published on 10 May 2026 - 11:16

score 1k · Answer 5 · 2026-04-14 02:38:18

1k

Views

Question about showing $\mathbb{R}P^{3}$ is not homotopy equivalent to $\mathbb{R}P^{2} \vee S^3$.

Published on 14 Apr 2026 - 2:38

score 275 · Answer 6 · 2026-04-16 23:26:35

275

Views

Reduced cohomology relation to regular cohomology

Published on 16 Apr 2026 - 23:26

score 69 · Answer 7 · 2026-04-16 00:58:12

69

Views

Retraction $S^2 \vee S^4 \rightarrow S^2$ collapsing $S^4$ to the wedge point induces homomorphism on second cohomology.

Published on 16 Apr 2026 - 0:58

score 48 · Answer 8 · 2026-04-15 02:13:33

48

Views

Example of rationally acyclic open non-oriented manifold.

Published on 15 Apr 2026 - 2:13

score 344 · Answer 9 · 2026-04-13 19:27:22

344

Views

Gaining an appreciation for homology class representatives in $\mathbb CP^n$.

Published on 13 Apr 2026 - 19:27

score 667 · Answer 10 · 2026-04-12 18:11:28

667

Views

$S^2 \times S^4$ is not homotopy equivalent to $\mathbb{C}P^3$ using cohomology rings

Published on 12 Apr 2026 - 18:11

score 752 · Answer 11 · 2026-05-10 23:39:30

752

Views

How to compute cellular homology of a handle decomposition $D^m\cup H^{\gamma_1}\cup\dots\cup H^{\gamma_N}$

Published on 10 May 2026 - 23:39

score 421 · Answer 12 · 2026-05-10 16:34:13

421

Views

The Fubini-Study metric $ \omega_{ \mathrm{FS} } $ on the projective space $ \mathbb{P}^1 $

Published on 10 May 2026 - 16:34

score 91 · Answer 13 · 2026-05-10 15:27:36

91

Views

Computing Ext for a complex of modules, help with a proof in Stacks Project

Published on 10 May 2026 - 15:27

score 103 · Answer 14 · 2026-05-10 17:11:57

103

Views

Top non-zero Betti number of connected manifold of finite type.

Published on 10 May 2026 - 17:11

score 257 · Answer 15 · 2026-04-17 00:15:19

257

Views

Künneth theorem for compactly supported cohomology of manifold.

Published on 17 Apr 2026 - 0:15

List Question

The direct sum of any family of objects

Thom spectrum $MSpin$ and $E_2$-page for a large degree $i\geq 8$

Linking number and cup product

When compactly supported cohomology ring is zero?

Question about showing $\mathbb{R}P^{3}$ is not homotopy equivalent to $\mathbb{R}P^{2} \vee S^3$.

Reduced cohomology relation to regular cohomology

Retraction $S^2 \vee S^4 \rightarrow S^2$ collapsing $S^4$ to the wedge point induces homomorphism on second cohomology.

Example of rationally acyclic open non-oriented manifold.

Gaining an appreciation for homology class representatives in $\mathbb CP^n$.

$S^2 \times S^4$ is not homotopy equivalent to $\mathbb{C}P^3$ using cohomology rings

How to compute cellular homology of a handle decomposition $D^m\cup H^{\gamma_1}\cup\dots\cup H^{\gamma_N}$

The Fubini-Study metric $ \omega_{ \mathrm{FS} } $ on the projective space $ \mathbb{P}^1 $

Computing Ext for a complex of modules, help with a proof in Stacks Project

Top non-zero Betti number of connected manifold of finite type.

Künneth theorem for compactly supported cohomology of manifold.

Trending Questions

Popular # Hahtags

Popular Questions