Timeline for open set in $\mathbb{S}^2$ whose boundary is a finite union of points
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 4, 2017 at 23:52 | comment | added | YCor | I think this exercise, even if non-trivial, rather belongs on MathSE than here. | |
| Jan 4, 2017 at 23:41 | answer | added | ACL | timeline score: 2 | |
| Jan 4, 2017 at 23:35 | answer | added | Mizar | timeline score: 0 | |
| Jan 4, 2017 at 23:15 | answer | added | YCor | timeline score: 1 | |
| Jan 4, 2017 at 23:07 | comment | added | Ryan Budney | You argue that if the closure isn't $S^2$ then the complement of the closure is a non-empty open set. . . | |
| Jan 4, 2017 at 21:35 | review | Close votes | |||
| Jan 5, 2017 at 7:25 | |||||
| Jan 4, 2017 at 21:20 | comment | added | Benoît Kloeckner | @ACL: maybe, but I can see that a colleague not used to practice topology at all could need a hint there. | |
| Jan 4, 2017 at 21:19 | answer | added | Benoît Kloeckner | timeline score: 2 | |
| Jan 4, 2017 at 21:17 | answer | added | Ben McKay | timeline score: 6 | |
| Jan 4, 2017 at 21:10 | history | asked | guest12345 | CC BY-SA 3.0 |