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S May 22, 2018 at 0:42 history bounty ended CommunityBot
S May 22, 2018 at 0:42 history notice removed CommunityBot
May 17, 2018 at 13:43 comment added assaferan They can be eliminated just as in the original argument.
May 17, 2018 at 13:43 comment added assaferan It seems that the same argument works over any positive characteristic. The proof referenced here is using Miyanishi's result, which holds for any characteristic other than 2,3,5. The difference in small characteristic is due to the appearance of more singular surfaces, corresponding to the small subgroups of GL2. When $p=5$ the possibility of $x^2+y^3+z^5$ vanishes, when $p=3$ the binary tetrahedral group ($x^2+y^3+z^4$) appears, and when $p=2$, the binary octahedral group and the binary dihedral groups ($x^2 + y^3 + z^3y$ and $x^2 + y^2z + z^{n-1}$) appear.
S May 13, 2018 at 23:00 history bounty started CommunityBot
S May 13, 2018 at 23:00 history notice added user111524 Draw attention
May 12, 2018 at 15:41 history edited user111524 CC BY-SA 4.0
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May 11, 2018 at 20:26 history asked user111524 CC BY-SA 4.0