Question

Topology: Determine whether a subset is a retract of R^2

score 734 · Answer 1 · 2026-02-22 23:28:44

734

Views

Topology: Determine whether a subset is a retract of R^2

Published on 22 Feb 2026 - 23:28

score 109 · Answer 2 · 2026-02-22 23:31:11

109

Views

Retractions and local finiteness: Are these circles a retract of $\mathbb R^2$?

Published on 22 Feb 2026 - 23:31

score 372 · Answer 3 · 2026-02-22 23:28:46

372

Views

strong deformation retracts & neighbourhood deformation retracts

Published on 22 Feb 2026 - 23:28

score 266 · Answer 4 · 2026-02-22 23:24:36

266

Views

About continuous extensions and retractions

Published on 22 Feb 2026 - 23:24

score 206 · Answer 5 · 2026-02-22 21:48:13

206

Views

Local connectedness is preserved under retractions

Published on 22 Feb 2026 - 21:48

score 54 · Answer 6 · 2026-02-22 23:29:52

54

Views

Construct retraction of $conv(X)$ onto $X=[0,1]\times\{0\}\cup\bigcup_{n\in\mathbb{N}}\{1/n\}\times[-1/n,1/n]$

Published on 22 Feb 2026 - 23:29

score 170 · Answer 7 · 2026-02-22 23:28:46

170

Views

Continuous surjective map on a path connected subset of $\mathbb R^n$ which induces a covering map on a deformation retract space

Published on 22 Feb 2026 - 23:28

score 88 · Answer 8 · 2026-02-22 23:29:52

88

Views

The number of retracts of $\mathbb{R}^2 \setminus \{(0,0)\}$ up to homeomorphic

Published on 22 Feb 2026 - 23:29

score 177 · Answer 9 · 2026-02-22 23:31:11

177

Views

On the retract of product of two spaces

Published on 22 Feb 2026 - 23:31

score 86 · Answer 10 · 2026-02-22 23:25:12

86

Views

$\mathbb C^{\infty}\setminus\{0\}$ retracts on $S^{\infty}$

Published on 22 Feb 2026 - 23:25

score 157 · Answer 11 · 2026-02-22 23:29:58

157

Views

If $X$ and $Y$ are subspaces of $Z$, $X \cong Y$ and $X$ is a retract of $Z$, is $Y$ also a retract of $Z$?

Published on 22 Feb 2026 - 23:29

score 32 · Answer 12 · 2026-02-23 01:06:45

32

Views

proving $(\mathbb{B}^2 \times \{0 \}) \bigcup (\mathbb{S}^1 \times [0, \infty))$ is a retract of $\mathbb{R}^3$

Published on 23 Feb 2026 - 1:06

score 408 · Answer 13 · 2026-02-23 01:08:07

408

Views

Fundamental group of the following figure: (half-full sphere with two "quotiented" holes)

Published on 23 Feb 2026 - 1:08

score 197 · Answer 14 · 2026-02-23 01:08:25

197

Views

$A\times Y$ deformation retract of $X\times Y$ if and only if $A$ deformation retract of $X$?

Published on 23 Feb 2026 - 1:08

score 180 · Answer 15 · 2026-02-23 01:05:16

180

Views

Proof of fixed point theorem on $D^1$ using the technique used in Brouwer's fixed point theorem.

Published on 23 Feb 2026 - 1:05

List Question

Topology: Determine whether a subset is a retract of R^2

Retractions and local finiteness: Are these circles a retract of $\mathbb R^2$?

strong deformation retracts & neighbourhood deformation retracts

About continuous extensions and retractions

Local connectedness is preserved under retractions

Construct retraction of $conv(X)$ onto $X=[0,1]\times\{0\}\cup\bigcup_{n\in\mathbb{N}}\{1/n\}\times[-1/n,1/n]$

Continuous surjective map on a path connected subset of $\mathbb R^n$ which induces a covering map on a deformation retract space

The number of retracts of $\mathbb{R}^2 \setminus \{(0,0)\}$ up to homeomorphic

On the retract of product of two spaces

$\mathbb C^{\infty}\setminus\{0\}$ retracts on $S^{\infty}$

If $X$ and $Y$ are subspaces of $Z$, $X \cong Y$ and $X$ is a retract of $Z$, is $Y$ also a retract of $Z$?

proving $(\mathbb{B}^2 \times \{0 \}) \bigcup (\mathbb{S}^1 \times [0, \infty))$ is a retract of $\mathbb{R}^3$

Fundamental group of the following figure: (half-full sphere with two "quotiented" holes)

$A\times Y$ deformation retract of $X\times Y$ if and only if $A$ deformation retract of $X$?

Proof of fixed point theorem on $D^1$ using the technique used in Brouwer's fixed point theorem.

Trending Questions

Popular # Hahtags

Popular Questions