Timeline for Orbifolds vs. branched covers
Current License: CC BY-SA 3.0
6 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Oct 16, 2013 at 16:05 | answer | added | NWMT | timeline score: 2 | |
| Oct 16, 2013 at 0:00 | comment | added | Andy Putman | (but it is possible to define branched cover so that the maps $M \rightarrow M/G$ are branched covers whenever $G$ is a group acting on the manifold $M$ properly discontinuously). | |
| Oct 15, 2013 at 23:59 | comment | added | Andy Putman | You have to be careful with what you mean when you say "branched cover". For instance, the group $\mathbb{Z}/2$ acts on $\mathbb{R}^2$ via the map that takes $(x,y)$ to $(-x,y)$. The quotient is a half-space $X$ which is an orbifold whose "orbifold points" are the entire boundary. But usually when you define branched covers of surfaces, the branch locus is discrete. | |
| Oct 15, 2013 at 23:56 | answer | added | SashaKolpakov | timeline score: 4 | |
| Oct 15, 2013 at 23:35 | review | First posts | |||
| Oct 15, 2013 at 23:35 | |||||
| Oct 15, 2013 at 23:16 | history | asked | Taylor McNeill | CC BY-SA 3.0 |