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Nov 6, 2020 at 18:30 answer added Michael Rozenberg timeline score: 1
Nov 6, 2020 at 16:59 answer added Michael Rozenberg timeline score: 3
Oct 28, 2020 at 13:12 comment added BPN Many thanks to Henri, Iosif, Sean And Fedor for their nice solutions!
Oct 28, 2020 at 1:52 vote accept BPN
Oct 28, 2020 at 1:52 vote accept BPN
Oct 28, 2020 at 1:52
Oct 27, 2020 at 21:56 history became hot network question
Oct 27, 2020 at 19:59 vote accept BPN
Oct 28, 2020 at 1:52
Oct 27, 2020 at 18:14 answer added Fedor Petrov timeline score: 8
Oct 27, 2020 at 17:55 answer added Sean Eberhard timeline score: 10
Oct 27, 2020 at 17:13 answer added Iosif Pinelis timeline score: 3
Oct 27, 2020 at 16:43 comment added Henri Cohen The minimum of the parabola $x^2+y^2+z^2+2xyz-2(xy+yz+zx)$ is equal to $-y(y-2)z(z-2)$. I let you go from there.
Oct 27, 2020 at 13:56 history asked BPN CC BY-SA 4.0