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seen Jun 16 at 15:45

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Jun
16
comment Ex 6.7 in Görtz and Wedhorn's AGI
Dear Fang, I think the point of @johnw. 's comment was that there are two authors of the book you link to (Wedhorn as well as Görtz), but your title only mentions one of them. Regards,
Jun
16
answered Hartshorne “Algebraic Geometry” theorem 8.15
Jun
16
comment Prove that $6$ and $2(1+\sqrt{-5})$ do not have a gcd in $\mathbb{Z}[\sqrt{-5}]$
Dear Manolis, That's correct. Regards,
Jun
16
answered Every $A$-mod is flat iff every mod-$A$ is flat.
Jun
16
comment Every $A$-mod is flat iff every mod-$A$ is flat.
Dear Pedro, I went to look for you in chat, but then saw you'd posted your question here. I will post an answer below. Cheers,