On symplectic automorphisms of hyperk\"ahler fourfolds of K3^[2] type
classification
🧮 math.AG
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symplecticahlerautomorphismsfourfoldshyperkschemeautomorphismcontained
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The present paper proves that finite symplectic groups of automorphisms of hyperk\"ahler fourfolds deformation equivalent to the Hilbert scheme of two points on a $K3$ surface are contained in the simple group $Co_1$. Then we give an example of a symplectic automorphism of order 11 on the Fano scheme of lines of a cubic fourfold.
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