Question

Every closed subset of a Banach separable space is separable

score 916 · Answer 1 · 2026-03-25 22:10:16

916

Views

Every closed subset of a Banach separable space is separable

Published on 25 Mar 2026 - 22:10

score 126 · Answer 2 · 2026-03-26 11:06:08

126

Views

Is compactness needed in Birkhoff's theorem on dynamic systems?

Published on 26 Mar 2026 - 11:06

score 405 · Answer 3 · 2026-03-27 12:20:13

405

Views

Is a morphism between graphs that doesn't respect adjacency a homomorphism but not a graph homomorphism?

Published on 27 Mar 2026 - 12:20

score 262 · Answer 4 · 2018-04-30 13:03:40

262

Views

Topology: Open and Closed Sets

Published on 30 Apr 2018 - 13:03

score 136 · Answer 5 · 2026-03-25 00:07:40

136

Views

Is the type of a knot dependent on the space in which it is embedded or not?

Published on 25 Mar 2026 - 0:07

score 1.1k · Answer 6 · 2026-03-25 09:38:47

1.1k

Views

Find the universal covering of $\mathbb{R}P^2\vee\mathbb{R}P^2$

Published on 25 Mar 2026 - 9:38

score 144 · Answer 7 · 2026-03-26 04:50:24

144

Views

Is a local diffeomorphism with nice boundary values a diffeomorphism?

Published on 26 Mar 2026 - 4:50

score 96 · Answer 8 · 2026-04-01 10:50:12

96

Views

Characterizing continuous maps between two topological spaces:

Published on 01 Apr 2026 - 10:50

score 123 · Answer 9 · 2018-04-30 20:12:10

123

Views

How to prove one point compactification in $T_2$ space

Published on 30 Apr 2018 - 20:12

score 168 · Answer 10 · 2026-03-25 06:02:15

168

Views

Characterizing derivatives and other functions as "best local approximations"

Published on 25 Mar 2026 - 6:02

score 232 · Answer 11 · 2026-03-25 09:43:11

232

Views

Show that if $X$ is homotopically equivalent to $Y$, then $\widetilde{X}$ is homotopically equivalent to $\widetilde{Y}$

Published on 25 Mar 2026 - 9:43

score 180 · Answer 12 · 2026-03-23 10:19:18

180

Views

Proving a perfect map preserves metrizability

Published on 23 Mar 2026 - 10:19

score 732 · Answer 13 · 2026-03-30 10:39:11

732

Views

How to show that the space 'line with two origins' is path connected?

Published on 30 Mar 2026 - 10:39

score 191 · Answer 14 · 2026-03-27 01:04:27

191

Views

Is the set path-connected?

Published on 27 Mar 2026 - 1:04

score 55 · Answer 15 · 2018-05-01 09:23:40

55

Views

Find the boundary and interior of $\mathbb R \times \mathbb N$ in $\mathbb R^2$

Published on 01 May 2018 - 9:23

List Question

Every closed subset of a Banach separable space is separable

Is compactness needed in Birkhoff's theorem on dynamic systems?

Is a morphism between graphs that doesn't respect adjacency a homomorphism but not a graph homomorphism?

Topology: Open and Closed Sets

Is the type of a knot dependent on the space in which it is embedded or not?

Find the universal covering of $\mathbb{R}P^2\vee\mathbb{R}P^2$

Is a local diffeomorphism with nice boundary values a diffeomorphism?

Characterizing continuous maps between two topological spaces:

How to prove one point compactification in $T_2$ space

Characterizing derivatives and other functions as "best local approximations"

Show that if $X$ is homotopically equivalent to $Y$, then $\widetilde{X}$ is homotopically equivalent to $\widetilde{Y}$

Proving a perfect map preserves metrizability

How to show that the space 'line with two origins' is path connected?

Is the set path-connected?

Find the boundary and interior of $\mathbb R \times \mathbb N$ in $\mathbb R^2$

Trending Questions

Popular # Hahtags

Popular Questions