Timeline for What is known about finite morphisms from X to the projective line
Current License: CC BY-SA 2.5
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Apr 12, 2010 at 9:47 | comment | added | Ariyan Javanpeykar | I already looked at Hartshorne. That's actually where I got the "inspiration" to ask the question. Basically, there the Hurwitz formula is applied to show that f is an isomorphism when it is etale. I do admit that the question is kind of vague. (There is a reason why I ask this question though. It has to do with push-forward maps in K-theory and intersection theory.) Anyway, thnx for the reference on Narasimhan's book. I'll take a look at it. | |
Apr 12, 2010 at 9:18 | history | answered | Jinhyun Park | CC BY-SA 2.5 |