Question

Preimage of a set in the product topology

score 695 · Answer 1 · 2026-04-15 02:24:11

695

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Preimage of a set in the product topology

Published on 15 Apr 2026 - 2:24

score 62 · Answer 2 · 2026-04-13 23:56:57

62

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Does exist a compact connected $K' \subset U$ such that $K \subset K'$, if $U$ is an open connected and $K$ in $U$ a compact?

Published on 13 Apr 2026 - 23:56

score 101 · Answer 3 · 2026-04-11 08:43:20

101

Views

Simple groups and fundamental groups

Published on 11 Apr 2026 - 8:43

score 285 · Answer 4 · 2026-04-11 13:11:03

285

Views

Why does the covering transformation group act properly discontinuously on the fiber?

Published on 11 Apr 2026 - 13:11

score 101 · Answer 5 · 2026-04-23 20:21:00

101

Views

Is there a relationship between loop(topology) and loop(abstract algebra)

Published on 23 Apr 2026 - 20:21

score 32 · Answer 6 · 2026-04-12 13:23:14

32

Views

Is an open subset of an open set of a topological space open?

Published on 12 Apr 2026 - 13:23

score 7.7k · Answer 7 · 2026-03-25 06:19:25

7.7k

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An example of open but not closed map.

Published on 25 Mar 2026 - 6:19

score 66 · Answer 8 · 2026-04-24 23:50:46

66

Views

$( \mathscr{X}, d_x)$ and $( \mathscr{Y}, d_y)$ metric spaces ..Proof Verification

Published on 24 Apr 2026 - 23:50

score 1.5k · Answer 9 · 2026-04-16 05:37:30

1.5k

Views

Prove that If B is open, then $\overline{A} \cap B \subset \overline{A \cap B}$

Published on 16 Apr 2026 - 5:37

score 53 · Answer 10 · 2026-04-12 10:39:13

53

Views

Proving that given topological sets forms a partition.

Published on 12 Apr 2026 - 10:39

score 96 · Answer 11 · 2026-04-29 12:56:52

96

Views

Does the intersection of two dense, open sets have the Baire property?

Published on 29 Apr 2026 - 12:56

score 234 · Answer 12 · 2026-04-16 13:09:27

234

Views

If $Y$ is a Hausdorff space and $X$ which is a subspace of that space is limit point compact space . Then $X$ is closed.

Published on 16 Apr 2026 - 13:09

score 412 · Answer 13 · 2026-04-11 04:15:57

412

Views

Would not $Z \times Y$ be limit point compact set but not compact set?

Published on 11 Apr 2026 - 4:15

score 51 · Answer 14 · 2026-04-14 07:21:22

51

Views

Metric space Cat. I and Cat. 2

Published on 14 Apr 2026 - 7:21

score 655 · Answer 15 · 2026-04-16 14:51:03

655

Views

Why are open sets denoted $U$, $G$, and measurable sets $E$?

Published on 16 Apr 2026 - 14:51

List Question

Preimage of a set in the product topology

Does exist a compact connected $K' \subset U$ such that $K \subset K'$, if $U$ is an open connected and $K$ in $U$ a compact?

Simple groups and fundamental groups

Why does the covering transformation group act properly discontinuously on the fiber?

Is there a relationship between loop(topology) and loop(abstract algebra)

Is an open subset of an open set of a topological space open?

An example of open but not closed map.

$( \mathscr{X}, d_x)$ and $( \mathscr{Y}, d_y)$ metric spaces ..Proof Verification

Prove that If B is open, then $\overline{A} \cap B \subset \overline{A \cap B}$

Proving that given topological sets forms a partition.

Does the intersection of two dense, open sets have the Baire property?

If $Y$ is a Hausdorff space and $X$ which is a subspace of that space is limit point compact space . Then $X$ is closed.

Would not $Z \times Y$ be limit point compact set but not compact set?

Metric space Cat. I and Cat. 2

Why are open sets denoted $U$, $G$, and measurable sets $E$?

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