Timeline for Degree 2 branched map from the torus to the sphere
Current License: CC BY-SA 2.5
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 3, 2010 at 19:31 | comment | added | algori | By the way, the Euler characteristic of the quotient by the hyperelliptic involution described in the stankewicz's answer can also be computed using Riemann-Hurwitz: we get ((2-2g)-(2+2g))/2+2+2g=2. | |
| Feb 3, 2010 at 19:25 | comment | added | algori | Anweshi -- applying Riemann-Hurwitz we get the Euler characteristic of the quotient: it is (0-4)/2+4=2 (since the images of all singular points are distinct). | |
| Feb 3, 2010 at 19:22 | comment | added | Anweshi | This quotient is not a torus? | |
| Feb 3, 2010 at 19:14 | history | answered | algori | CC BY-SA 2.5 |