List questions from geometric-topology

173

Views

Are $\{(x,y)\in \mathbb{R}^2 : (x,y)\neq(0,0)\}$ and $\{(x,y)\in \mathbb{R}^2 : (x,y)\notin [0,1]\times\{0\}\}$ homeomorphic?

Published on 10 Feb 2015 - 14:53

1.2k

Views

Maximum principle of harmonic function on compact manifold

Published on 30 Mar 2026 - 10:09

280

Views

Framing of embedding induces an isotopy of embeddings

Published on 12 Feb 2015 - 21:26

266

Views

punctured Mobius band in high dimension

Published on 18 Feb 2015 - 1:46

150

Views

Homotopically equivalent manifolds and product with $\mathbb{R}$

Published on 21 Feb 2015 - 11:12

1.8k

Views

Why is homeomorphism understood as stretching and bending?

Published on 22 Feb 2015 - 10:57

167

Views

A reference for a result by A. Casson

Published on 23 Feb 2015 - 8:43

75

Views

Zeros of vector field extended from field lines

Published on 27 Mar 2026 - 22:02

9.1k

Views

The Equation of a Tangent Line to a Circle at a Point

Published on 02 Mar 2015 - 22:11

349

Views

Several questions concerning Alexander's Theorem

Published on 03 Mar 2015 - 3:34

488

Views

Description of real projective space $P^3$

Published on 09 Mar 2015 - 5:18

153

Views

Is the closure of $[\sigma_1^2,\sigma_2^2]$ in $B_3$ equal to the Borromean rings?

Published on 25 Mar 2026 - 12:28

168

Views

Euler Characteristic of Side identification

Published on 15 Mar 2015 - 14:56

432

Views

Side identification on a hexagon

Published on 15 Mar 2015 - 16:56

435

Views

Maps from $D^n$ to $D^n$ with a single inverse set are open.

Published on 18 Mar 2015 - 2:47

List Question

Are $\{(x,y)\in \mathbb{R}^2 : (x,y)\neq(0,0)\}$ and $\{(x,y)\in \mathbb{R}^2 : (x,y)\notin [0,1]\times\{0\}\}$ homeomorphic?

Maximum principle of harmonic function on compact manifold

Framing of embedding induces an isotopy of embeddings

punctured Mobius band in high dimension

Homotopically equivalent manifolds and product with $\mathbb{R}$

Why is homeomorphism understood as stretching and bending?

A reference for a result by A. Casson

Zeros of vector field extended from field lines

The Equation of a Tangent Line to a Circle at a Point

Several questions concerning Alexander's Theorem

Description of real projective space $P^3$

Is the closure of $[\sigma_1^2,\sigma_2^2]$ in $B_3$ equal to the Borromean rings?

Euler Characteristic of Side identification

Side identification on a hexagon

Maps from $D^n$ to $D^n$ with a single inverse set are open.

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