Possible 3-divisible A2^n configurations of smooth rational curves on K3 surfaces in char 3 are described and the resulting triple covers are fully classified.
Dolgachev and JH Keum, Finite symplectic groups of automorphisms of K3 surfaces in positive characteristic, Annals of Math.169(2009), 269–313
2 Pith papers cite this work. Polarity classification is still indexing.
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Complete classification of finite symplectic automorphism groups on supersingular K3 surfaces of Artin invariant one, extending via prior work to all K3 surfaces in char p>11.
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The 3-divisibility of divisors on K3 surfaces in characteristic 3
Possible 3-divisible A2^n configurations of smooth rational curves on K3 surfaces in char 3 are described and the resulting triple covers are fully classified.
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Finite symplectic automorphism groups of supersingular K3 surfaces
Complete classification of finite symplectic automorphism groups on supersingular K3 surfaces of Artin invariant one, extending via prior work to all K3 surfaces in char p>11.