Timeline for Let $U$ be a simply connected open subset of ${\Bbb S}^2$, is the complement of $U$ also simply connected?
Current License: CC BY-SA 4.0
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| Apr 30, 2020 at 17:05 | comment | added | H. H. Rugh | Thanks a lot for your comprehensive answer. Exactly what I was hoping for. And nice twist with the sine curve being s.c. but in a somewhat pathological way. I'll look into Fischer and Zastrow. | |
| Apr 30, 2020 at 16:56 | vote | accept | H. H. Rugh | ||
| Apr 30, 2020 at 15:01 | history | answered | Jeremy Brazas | CC BY-SA 4.0 |