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Oct 9, 2012 at 18:39 vote accept Mikhail Bondarko
Oct 8, 2012 at 11:42 comment added Donu Arapura The other thing that I should point out is that for this devissage argument to work, one has to prove it for general coefficients.
Oct 8, 2012 at 11:12 comment added Donu Arapura Devissage is a bit like induction, which can also be confusing. Most of the work goes into the induction step (step 3).
Oct 8, 2012 at 9:11 comment added Mikhail Bondarko Thank you! Part 3 of this argument seems to be the most difficult one; I should think about it.
Oct 8, 2012 at 8:52 history answered Piotr Achinger CC BY-SA 3.0