Question

Can I Approximate a Homeomorphism by Permuting a Grid?

score 82 · Answer 1 · 2026-04-13 04:14:38

82

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Can I Approximate a Homeomorphism by Permuting a Grid?

Published on 13 Apr 2026 - 4:14

score 67 · Answer 2 · 2026-04-13 23:11:03

67

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Expressing a regular level set as a regular zero set for any smooth real-valued function

Published on 13 Apr 2026 - 23:11

score 421 · Answer 3 · 2026-04-15 04:23:49

421

Views

zero geometric intersection number between two simple closed curves on an oriented connected closed surface of genus $g \ge 1$

Published on 15 Apr 2026 - 4:23

score 154 · Answer 4 · 2026-04-16 12:35:00

154

Views

Why is the trace of such a simplicial map is zero?

Published on 16 Apr 2026 - 12:35

score 160 · Answer 5 · 2026-04-11 04:58:12

160

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How the components of alternating link diagram $D$ are boundaries of the regions of one color after performing positive smoothing at all crossings?

Published on 11 Apr 2026 - 4:58

score 69 · Answer 6 · 2026-04-15 08:23:42

69

Views

Can I approximate a Homeomorphism by Permuting a (non uniform) grid?

Published on 15 Apr 2026 - 8:23

score 126 · Answer 7 · 2026-04-16 12:48:26

126

Views

How to compute cohomology of $C^0(S^n,X)$?

Published on 16 Apr 2026 - 12:48

score 108 · Answer 8 · 2026-03-25 19:16:05

108

Views

Chern Class and Stiefel-Whitney class for $U(N)$ and $PSU(N)$ vector bundle

Published on 25 Mar 2026 - 19:16

score 247 · Answer 9 · 2026-04-15 22:21:14

247

Views

Some Homology and Cohomology Calculations for the quotient map $q:S^n\rightarrow \mathbb{R}P^n$

Published on 15 Apr 2026 - 22:21

score 233 · Answer 10 · 2026-04-14 19:33:39

233

Views

Is a Chern class a property of a vector bundle or of a section of the bundle?

Published on 14 Apr 2026 - 19:33

score 397 · Answer 11 · 2026-04-12 07:48:05

397

Views

A function $f:X \to Y$ which induces isomorphisms on all homology groups but $X$ and $Y$ have non-isomorphic cohomology rings.

Published on 12 Apr 2026 - 7:48

score 241 · Answer 12 · 2026-04-12 01:27:57

241

Views

Definition of equivariant chain complex.

Published on 12 Apr 2026 - 1:27

score 103 · Answer 13 · 2026-04-09 19:29:28

103

Views

Proof review of a theorem

Published on 09 Apr 2026 - 19:29

score 149 · Answer 14 · 2026-04-13 05:23:40

149

Views

free group acting on the 3D sphere

Published on 13 Apr 2026 - 5:23

score 1.1k · Answer 15 · 2026-04-16 21:52:07

1.1k

Views

Calculate the fundamental group of $\pi_1(S^1)$

Published on 16 Apr 2026 - 21:52

List Question

Can I Approximate a Homeomorphism by Permuting a Grid?

Expressing a regular level set as a regular zero set for any smooth real-valued function

zero geometric intersection number between two simple closed curves on an oriented connected closed surface of genus $g \ge 1$

Why is the trace of such a simplicial map is zero?

How the components of alternating link diagram $D$ are boundaries of the regions of one color after performing positive smoothing at all crossings?

Can I approximate a Homeomorphism by Permuting a (non uniform) grid?

How to compute cohomology of $C^0(S^n,X)$?

Chern Class and Stiefel-Whitney class for $U(N)$ and $PSU(N)$ vector bundle

Some Homology and Cohomology Calculations for the quotient map $q:S^n\rightarrow \mathbb{R}P^n$

Is a Chern class a property of a vector bundle or of a section of the bundle?

A function $f:X \to Y$ which induces isomorphisms on all homology groups but $X$ and $Y$ have non-isomorphic cohomology rings.

Definition of equivariant chain complex.

Proof review of a theorem

free group acting on the 3D sphere

Calculate the fundamental group of $\pi_1(S^1)$

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