List questions from geometric-topology

Published on 05 Apr 2016 - 9:33

442

Views

group actions of fundamental groups on homotopy groups

Published on 31 Mar 2026 - 5:36

44

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Path homotopy between $\alpha(t) = t-t^2$ and $\beta(t) = t^2-t$

Published on 07 Apr 2016 - 14:19

595

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figure-8 knot complement

Published on 26 Mar 2026 - 23:01

94

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Is $\overline{u^{-1}((-\infty,a))}$ a $C^k$-manifold with boundary for a $C^k$ function $u$?

Published on 27 Mar 2026 - 8:16

490

Views

Potential proof for the Slice-Ribbon conjecture (may be wrong).

Published on 26 Mar 2026 - 11:06

311

Views

if M is compact and N is connected, then M=N ...?

Published on 12 Apr 2016 - 17:51

72

Views

stable homotopy groups of the projective plane

Published on 27 Mar 2026 - 16:24

166

Views

Euler's formula about graphs embedded in $\mathbb{R^2}$

Published on 13 Apr 2016 - 10:15

2.6k

Views

Is the fundamental group of a retract a subgroup of the original space?

Published on 14 Apr 2016 - 22:39

385

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Is an isometric and bijective mapping between two metric spaces complete?

Published on 14 Apr 2016 - 23:47

89

Views

Homeomorphism between $\Bbb S$\ $\lbrace-1\rbrace$ and $\left(-1,1\right)$

Published on 15 Apr 2016 - 0:09

888

Views

identify the topological type obtained by gluing sides of the hexagon

Published on 15 Apr 2016 - 20:53

376

Views

Is this octogon topologically equivalent to the Klein Bottle?

Published on 15 Apr 2016 - 22:59

540

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 17 Apr 2016 - 15:29

List Question

How to determine all graph automorphisms for a given graph?

group actions of fundamental groups on homotopy groups

Path homotopy between $\alpha(t) = t-t^2$ and $\beta(t) = t^2-t$

figure-8 knot complement

Is $\overline{u^{-1}((-\infty,a))}$ a $C^k$-manifold with boundary for a $C^k$ function $u$?

Potential proof for the Slice-Ribbon conjecture (may be wrong).

if M is compact and N is connected, then M=N ...?

stable homotopy groups of the projective plane

Euler's formula about graphs embedded in $\mathbb{R^2}$

Is the fundamental group of a retract a subgroup of the original space?

Is an isometric and bijective mapping between two metric spaces complete?

Homeomorphism between $\Bbb S$\ $\lbrace-1\rbrace$ and $\left(-1,1\right)$

identify the topological type obtained by gluing sides of the hexagon

Is this octogon topologically equivalent to the Klein Bottle?

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

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