Question

Criterion for projectively cofibrant diagrams?

score 234 · Answer 1 · 2026-03-28 09:33:00

234

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Criterion for projectively cofibrant diagrams?

Published on 28 Mar 2026 - 9:33

score 189 · Answer 2 · 2026-04-16 09:42:53

189

Views

Simplicial approximation

Published on 16 Apr 2026 - 9:42

score 420 · Answer 3 · 2026-04-14 14:29:27

420

Views

Are all quotients of a weakly contractible space via a free group action classifying spaces of the group?

Published on 14 Apr 2026 - 14:29

score 2.1k · Answer 4 · 2026-04-13 06:39:24

2.1k

Views

Reference: In every free homotopy class is a unique minimizing closed geodesic

Published on 13 Apr 2026 - 6:39

score 1.8k · Answer 5 · 2026-04-14 14:49:59

1.8k

Views

Question on showing a bijection between $\pi_1(X,x_0)$ and $[S^1, X]$ when X is path connected.

Published on 14 Apr 2026 - 14:49

score 157 · Answer 6 · 2015-03-24 19:16:54

157

Views

Homotopy split monomorphisms

Published on 24 Mar 2015 - 19:16

score 386 · Answer 7 · 2026-04-15 13:00:14

386

Views

When a homotopy equivalence of the closed unit ball in the Euclidean n- dimensional space is injective?

Published on 15 Apr 2026 - 13:00

score 198 · Answer 8 · 2026-04-12 16:18:44

198

Views

Homotopy and Semidirect Product

Published on 12 Apr 2026 - 16:18

score 1.8k · Answer 9 · 2026-04-12 06:20:24

1.8k

Views

Homotopy proof of Cauchy's Theorem

Published on 12 Apr 2026 - 6:20

score 130 · Answer 10 · 2026-04-14 14:42:10

130

Views

Finding a good cover such that its lifting is still a good cover

Published on 14 Apr 2026 - 14:42

score 165 · Answer 11 · 2026-04-16 01:20:10

165

Views

Based on the Andreotti-Frankel theorem, what is the CW complex homotopy equivalent to $x^2 + y^2 - 1$?

Published on 16 Apr 2026 - 1:20

score 347 · Answer 12 · 2015-03-29 16:30:00

347

Views

A construction with homotopy colimits and homotopy pullbacks for descent.

Published on 29 Mar 2015 - 16:30

score 743 · Answer 13 · 2026-04-16 08:50:35

743

Views

What is this relation on the set of paths called in graph theory?

Published on 16 Apr 2026 - 8:50

score 447 · Answer 14 · 2026-04-15 22:23:47

447

Views

A quotient map $X\to X/A$ that is not a Serre fibration

Published on 15 Apr 2026 - 22:23

score 39 · Answer 15 · 2026-04-14 01:16:48

39

Views

proof of the decomposition of a fibration by a trivial fibration followed by a minimal fibration

Published on 14 Apr 2026 - 1:16

List Question

Criterion for projectively cofibrant diagrams?

Simplicial approximation

Are all quotients of a weakly contractible space via a free group action classifying spaces of the group?

Reference: In every free homotopy class is a unique minimizing closed geodesic

Question on showing a bijection between $\pi_1(X,x_0)$ and $[S^1, X]$ when X is path connected.

Homotopy split monomorphisms

When a homotopy equivalence of the closed unit ball in the Euclidean n- dimensional space is injective?

Homotopy and Semidirect Product

Homotopy proof of Cauchy's Theorem

Finding a good cover such that its lifting is still a good cover

Based on the Andreotti-Frankel theorem, what is the CW complex homotopy equivalent to $x^2 + y^2 - 1$?

A construction with homotopy colimits and homotopy pullbacks for descent.

What is this relation on the set of paths called in graph theory?

A quotient map $X\to X/A$ that is not a Serre fibration

proof of the decomposition of a fibration by a trivial fibration followed by a minimal fibration

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