Bloch's conjecture for hyperkähler varieties with non-symplectic automorphisms

Let XX be a hyperkähler variety of dimension 2m2m, and let σAut(X)\sigma\in\operatorname{Aut}(X) be a non-symplectic automorphism of order kk with k>mk>m. Then

(σ+σ2++σk):Ahom2m(X)A2m(X) is zero.\bigl(\sigma+\sigma^2+\ldots+\sigma^k\bigr)_*:A^{2m}_{hom}(X)\to A^{2m}(X)\text{ is zero}.

Bloch's conjecture. The sum of the actions of the powers of σ\sigma annihilates homologically trivial zero-cycles. This prediction follows in the source from the correspondence formulation of Bloch's conjecture; the supplied status evidence does not report a resolution of this hyperkähler case in general.

Sources & referencesView supporting material

Primary source

Robert Laterveer, “Algebraic cycles on certain hyperkaehler fourfolds with an order 3 non-symplectic automorphism”, arXiv:1712.05981 (2017).

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