Question

configuration spaces in mathematics and in physics

score 181 · Answer 1 · 2026-04-14 06:52:59

181

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configuration spaces in mathematics and in physics

Published on 14 Apr 2026 - 6:52

score 889 · Answer 2 · 2026-04-03 08:16:12

889

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identify the topological type obtained by gluing sides of the hexagon

Published on 03 Apr 2026 - 8:16

score 377 · Answer 3 · 2026-04-22 10:58:16

377

Views

Is this octogon topologically equivalent to the Klein Bottle?

Published on 22 Apr 2026 - 10:58

score 83 · Answer 4 · 2026-03-27 18:09:31

83

Views

The significance of CW-complexes in homotopy theory

Published on 27 Mar 2026 - 18:09

score 541 · Answer 5 · 2026-04-03 08:14:55

541

Views

Homeomorhism of pairs $(D^n \times I,\mathbb{S}^{n-1} \times I \cup D^n \times \{0\})$ and $(D^n \times I,D^n \times \{0\})$

Published on 03 Apr 2026 - 8:14

score 3.8k · Answer 6 · 2026-04-11 06:49:33

3.8k

Views

Homology of contractible space

Published on 11 Apr 2026 - 6:49

score 286 · Answer 7 · 2026-03-31 00:06:47

286

Views

Do $G$-spaces with equivalent orbit categories also have equivalent fundamental categories?

Published on 31 Mar 2026 - 0:06

score 189 · Answer 8 · 2026-05-11 09:07:05

189

Views

Which of these graphs are homotopic but not homeomorphic?

Published on 11 May 2026 - 9:07

score 6.4k · Answer 9 · 2026-04-14 07:41:12

6.4k

Views

Every "star-shaped" set is simply connected

Published on 14 Apr 2026 - 7:41

score 296 · Answer 10 · 2026-04-10 23:40:14

296

Views

Continuous functions between topological spaces and their homotopy equivalence relations

Published on 10 Apr 2026 - 23:40

score 393 · Answer 11 · 2026-04-13 21:55:13

393

Views

Which surface is homotopy equivalent to $\Bbb{R}^4$ minus the planes $x=y=0$, $z=w=0$?

Published on 13 Apr 2026 - 21:55

score 360 · Answer 12 · 2026-04-16 09:06:36

360

Views

Two self maps $f,g:S^n\to S^n$ are homotopic if there is no $x\in S^n$ with $f(x)=-g(x)$

Published on 16 Apr 2026 - 9:06

score 1.1k · Answer 13 · 2026-04-17 07:10:57

1.1k

Views

Hatcher's proof of the van Kampen Theorem (injectivity of $\Phi$ – unique factorizations of $[f]$)

Published on 17 Apr 2026 - 7:10

score 272 · Answer 14 · 2026-05-10 15:00:02

272

Views

Obstruction for extending a map along a CW-inclusion: sufficient conditions?

Published on 10 May 2026 - 15:00

score 245 · Answer 15 · 2026-04-14 22:37:26

245

Views

Simplicial homotopy's exponential law

Published on 14 Apr 2026 - 22:37

List Question

configuration spaces in mathematics and in physics

identify the topological type obtained by gluing sides of the hexagon

Is this octogon topologically equivalent to the Klein Bottle?

The significance of CW-complexes in homotopy theory

Homeomorhism of pairs $(D^n \times I,\mathbb{S}^{n-1} \times I \cup D^n \times \{0\})$ and $(D^n \times I,D^n \times \{0\})$

Homology of contractible space

Do $G$-spaces with equivalent orbit categories also have equivalent fundamental categories?

Which of these graphs are homotopic but not homeomorphic?

Every "star-shaped" set is simply connected

Continuous functions between topological spaces and their homotopy equivalence relations

Which surface is homotopy equivalent to $\Bbb{R}^4$ minus the planes $x=y=0$, $z=w=0$?

Two self maps $f,g:S^n\to S^n$ are homotopic if there is no $x\in S^n$ with $f(x)=-g(x)$

Hatcher's proof of the van Kampen Theorem (injectivity of $\Phi$ – unique factorizations of $[f]$)

Obstruction for extending a map along a CW-inclusion: sufficient conditions?

Simplicial homotopy's exponential law

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