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Oct 1 at 5:19 comment added Doug Liu Dear @ely, An Artin-Schreier sheaf is a lisse sheaf. Isn't every lisse sheaf universally locally acyclic relative to the identity?
Oct 14, 2015 at 14:21 comment added ely This is not true. Take $S=\mathbb A_k^1, X=\mathbb A_S^1$ and $f=identity$. Let $\mathcal F$ is Artin-Schreier sheaf on $X$....
Oct 10, 2015 at 14:03 history edited ely CC BY-SA 3.0
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Sep 21, 2015 at 14:39 history asked ely CC BY-SA 3.0