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Jul 28, 2023 at 14:55 comment added rschwieb I've been scanning through the article: it seems to say any field $k$ will do. I'm a bit surprised there aren't problems in the characteristic $2$ case! It looks like the smallest field this works for is $\mathbb F_4$? And it is 6 dimensional?
Apr 14, 2022 at 8:40 history edited Erik D CC BY-SA 4.0
corrected a typo in the calculation of f(XY)
Apr 13, 2022 at 19:53 vote accept Mare
Apr 12, 2022 at 21:59 history edited Erik D CC BY-SA 4.0
The original claim, that $f(X) = aX$, was not correct; it should be $f(X) = aX+r$, $r\in\mathop{\rm rad}^2(A)$
Apr 12, 2022 at 4:49 history answered Erik D CC BY-SA 4.0