Question

Does $S^1 \vee S^1$ have a cover homotopically equivalent to the wedge sum of $k$ circles?

score 590 · Answer 1 · 2026-04-13 20:45:52

590

Views

Does $S^1 \vee S^1$ have a cover homotopically equivalent to the wedge sum of $k$ circles?

Published on 13 Apr 2026 - 20:45

score 108 · Answer 2 · 2026-04-13 02:47:11

108

Views

Homotopy as purely abstract property

Published on 13 Apr 2026 - 2:47

score 111 · Answer 3 · 2026-05-10 19:08:11

111

Views

Relationship (if any) between h-principle and homotopy analysis method

Published on 10 May 2026 - 19:08

score 43 · Answer 4 · 2026-04-14 13:05:08

43

Views

Homotopy group for a certain subset of Euclidean space

Published on 14 Apr 2026 - 13:05

score 91 · Answer 5 · 2026-04-23 21:17:33

91

Views

What notation is available for denoting paths up to homotopy?

Published on 23 Apr 2026 - 21:17

score 277 · Answer 6 · 2026-04-14 10:24:27

277

Views

$n$-connected cw pairs have $(n-1)$ cohomology onto induced by the inclusion map?

Published on 14 Apr 2026 - 10:24

score 145 · Answer 7 · 2026-04-10 10:42:12

145

Views

When is it true that $\varinjlim_i[X,Y_i]\cong[X,\varinjlim_iY_i]$

Published on 10 Apr 2026 - 10:42

score 449 · Answer 8 · 2026-04-14 07:21:56

449

Views

How is this space a deformation retract and not a strong deformation retract?

Published on 14 Apr 2026 - 7:21

score 151 · Answer 9 · 2026-04-13 06:18:13

If $Z$ is a strong deformation retract of $Y$ and $Y$ is a strong deformation retract of $X$, then $Z$ is a strong deformation retract of $X$.

score 1k · Answer 10 · 2026-04-12 22:29:12

1k

Views

Is a fibre bundle with contractible fibre a homotopy equivalence?

Published on 12 Apr 2026 - 22:29

score 279 · Answer 11 · 2026-04-25 14:32:10

279

Views

Why is the category of simplicial sets closed under finite inductive limits and projective limits?

Published on 25 Apr 2026 - 14:32

score 247 · Answer 12 · 2026-03-27 08:42:47

247

Views

Fundamental group generators of null homology manifolds

Published on 27 Mar 2026 - 8:42

score 145 · Answer 13 · 2026-04-14 10:48:35

145

Views

$\int_{\lambda} dz/(z^2-1)^2$, where $\lambda$ is a path in $\mathbb{R^2}-\{1,-1\}$

Published on 14 Apr 2026 - 10:48

score 242 · Answer 14 · 2026-04-09 12:19:50

242

Views

Properties of Deformation Retraction

Published on 09 Apr 2026 - 12:19

score 88 · Answer 15 · 2026-04-13 17:52:15

88

Views

Multiple roots for nonlinear algebraic equations

Published on 13 Apr 2026 - 17:52

List Question

Does $S^1 \vee S^1$ have a cover homotopically equivalent to the wedge sum of $k$ circles?

Homotopy as purely abstract property

Relationship (if any) between h-principle and homotopy analysis method

Homotopy group for a certain subset of Euclidean space

What notation is available for denoting paths up to homotopy?

$n$-connected cw pairs have $(n-1)$ cohomology onto induced by the inclusion map?

When is it true that $\varinjlim_i[X,Y_i]\cong[X,\varinjlim_iY_i]$

How is this space a deformation retract and not a strong deformation retract?

If $Z$ is a strong deformation retract of $Y$ and $Y$ is a strong deformation retract of $X$, then $Z$ is a strong deformation retract of $X$.

Is a fibre bundle with contractible fibre a homotopy equivalence?

Why is the category of simplicial sets closed under finite inductive limits and projective limits?

Fundamental group generators of null homology manifolds

$\int_{\lambda} dz/(z^2-1)^2$, where $\lambda$ is a path in $\mathbb{R^2}-\{1,-1\}$

Properties of Deformation Retraction

Multiple roots for nonlinear algebraic equations

Trending Questions

Popular # Hahtags

Popular Questions