Question

Rudin's theorem on compact sets and limit points

score 339 · Answer 1 · 2026-03-28 21:58:24

339

Views

Rudin's theorem on compact sets and limit points

Published on 28 Mar 2026 - 21:58

score 90 · Answer 2 · 2026-03-28 10:16:36

90

Views

Try to find a contradiction in showing a unit ball is not weakly compact.

Published on 28 Mar 2026 - 10:16

score 60 · Answer 3 · 2018-07-13 00:19:51

60

Views

How many closed separable subsets does a Hausdorff space have?

Published on 13 Jul 2018 - 0:19

score 665 · Answer 4 · 2026-04-09 03:58:54

665

Views

Definition of path-connected spaces

Published on 09 Apr 2026 - 3:58

score 70 · Answer 5 · 2018-07-13 12:29:07

70

Views

difference between $f^{-1}([-\infty ,a))$ and $f^{-1}(-\infty ,a)$?

Published on 13 Jul 2018 - 12:29

score 209 · Answer 6 · 2026-03-28 05:21:55

209

Views

Proving this function is a local homeomorphism. Is my proof correct?

Published on 28 Mar 2026 - 5:21

score 506 · Answer 7 · 2026-04-08 17:07:57

506

Views

Is a subset of $\mathbb R^2$ homeomorphic to an open subset of $\mathbb R^2$ an open subset?

Published on 08 Apr 2026 - 17:07

score 662 · Answer 8 · 2018-07-13 17:10:14

662

Views

Is any open subset of $R^n$ a union of countable hypercubes?

Published on 13 Jul 2018 - 17:10

score 76 · Answer 9 · 2026-04-09 10:00:23

76

Views

Boundary of non compact set in $\mathbb{R}^2$

Published on 09 Apr 2026 - 10:00

score 515 · Answer 10 · 2026-03-28 21:56:58

515

Views

Munkres proof that $ \mathbb{R}^{ \omega } $ is not locally compact (clarification needed)

Published on 28 Mar 2026 - 21:56

score 253 · Answer 11 · 2026-04-09 02:25:53

253

Views

Any closed 3-manifold is a boundary of some compact 4-manifold.

Published on 09 Apr 2026 - 2:25

score 199 · Answer 12 · 2018-07-14 06:02:25

199

Views

Positive Distance between two sets in a metric space

Published on 14 Jul 2018 - 6:02

score 165 · Answer 13 · 2026-04-09 04:56:26

165

Views

Homeomorphism between function spaces

Published on 09 Apr 2026 - 4:56

score 79 · Answer 14 · 2018-07-14 09:03:39

79

Views

Topologically nilpotent operator acting an a topological group

Published on 14 Jul 2018 - 9:03

score 242 · Answer 15 · 2018-07-14 09:13:36

242

Views

Lower semi-continuous functions coinciding on a dense subset

Published on 14 Jul 2018 - 9:13

List Question

Rudin's theorem on compact sets and limit points

Try to find a contradiction in showing a unit ball is not weakly compact.

How many closed separable subsets does a Hausdorff space have?

Definition of path-connected spaces

difference between $f^{-1}([-\infty ,a))$ and $f^{-1}(-\infty ,a)$?

Proving this function is a local homeomorphism. Is my proof correct?

Is a subset of $\mathbb R^2$ homeomorphic to an open subset of $\mathbb R^2$ an open subset?

Is any open subset of $R^n$ a union of countable hypercubes?

Boundary of non compact set in $\mathbb{R}^2$

Munkres proof that $ \mathbb{R}^{ \omega } $ is not locally compact (clarification needed)

Any closed 3-manifold is a boundary of some compact 4-manifold.

Positive Distance between two sets in a metric space

Homeomorphism between function spaces

Topologically nilpotent operator acting an a topological group

Lower semi-continuous functions coinciding on a dense subset

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