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Aug 30, 2017 at 17:37 history edited Sándor Kovács CC BY-SA 3.0
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Aug 30, 2017 at 17:34 comment added Sándor Kovács @PiotrAchinger: Oops, you're right. I was a little careless with that...
Aug 30, 2017 at 13:40 vote accept Jana
Aug 30, 2017 at 13:39 comment added Jana @SandorKovacs Thanks a lot for the detailed answer.
Aug 30, 2017 at 8:58 comment added Piotr Achinger Confused about the last statement: if $S$ is a point and $E=F$, you seem to claim that $\mathcal{E}nd(E)$ is trivial of rank ${\rm rk}(E)^2$. But this is false already for $E=\mathcal{O}\oplus\mathcal{O}(1)$ on $\mathbb{P}^1$.
Aug 30, 2017 at 0:56 history answered Sándor Kovács CC BY-SA 3.0