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Mar 29, 2020 at 18:16 vote accept Mikhail Borovoi
Mar 29, 2020 at 15:19 history edited Mikhail Borovoi CC BY-SA 4.0
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Mar 29, 2020 at 9:55 comment added Mikhail Borovoi @spin: I think it is an erroneous reference...
Mar 29, 2020 at 9:19 comment added spin Steinberg says there is a different proof for $k = \mathbb{C}$, and gives reference to "Lemma 5" in Volume 2 of Seminaire Chevalley. I do not find such a lemma there, and I wonder what is the intended reference.
Mar 29, 2020 at 9:01 history edited Mikhail Borovoi CC BY-SA 4.0
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Mar 29, 2020 at 8:06 history answered Mikhail Borovoi CC BY-SA 4.0