K3 surfaces as double covers of P2 - MathOverflow most recent 30 from http://mathoverflow.net2013-05-19T15:20:54Zhttp://mathoverflow.net/feeds/question/104230http://www.creativecommons.org/licenses/by-nc/2.5/rdfhttp://mathoverflow.net/questions/104230/k3-surfaces-as-double-covers-of-p2K3 surfaces as double covers of P2joe2012-08-07T20:22:27Z2012-08-07T20:54:10Z
<p>Consider a K3 surface given as the double branched cover over P^2, branched along a smooth sextic. What is the ramification divisor in the K3 surface?</p>
http://mathoverflow.net/questions/104230/k3-surfaces-as-double-covers-of-p2/104233#104233Answer by Jason Starr for K3 surfaces as double covers of P2Jason Starr2012-08-07T20:54:10Z2012-08-07T20:54:10Z<p>The ramification divisor projects isomorphically to the plane sextic curve. Is that what you were asking?</p>