Abstract:
In the talk, I'll consider the actions
of the symmetric group S4 on K3 surfaces X having the following property:
(∗) there exists an equivariant bi-rational
contraction ¯c:X→¯X to a K3 surface ¯X with ADE-singularities such that
¯X/S4≃P2.
I'll show that up to equivariant deformations there exist exactly 15 such actions
and these actions can be realized as the actions of the Galois group on the Galois normal closures
of the dualizing coverings of the projective plane associated with rational quartics having no singularities of types
A4, A6 and E6.