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Sep 1, 2023 at 5:48 history edited Jérémy Blanc CC BY-SA 4.0
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Sep 1, 2023 at 5:48 comment added Jérémy Blanc you are right, I corrected.
Jul 28, 2023 at 20:25 comment added AG learner $A_6$ should not occur as a singularity of a cubic surface: It is not a sub Dynkin diagram of $E_6$.
Dec 16, 2018 at 18:22 history answered Jérémy Blanc CC BY-SA 4.0