Voisin's injectivity conjecture for the tautological Chow ring of irreducible symplectic varieties

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Let XX be an irreducible symplectic complex variety. Define R(X)⊆CH⁡Q(X)R(X)\subseteq \operatorname{CH}_{\mathbb Q}(X) to be the subalgebra generated by CH⁡Q1(X)\operatorname{CH}^1_{\mathbb Q}(X) together with the Chern classes ci(TX)c_i(T_X) for i∈Ni\in\mathbb N. Let cXc_X denote the cycle class map.

Voisin's injectivity conjecture. The restriction

cX∣R(X):R(X)↪H∗(X,Q)\left.c_X\right|_{R(X)}:R(X)\hookrightarrow H^*(X,\mathbb Q)

is injective.

This is a stronger version of Beauville's weak splitting conjecture, replacing the algebra generated by divisor classes with the algebra also generated by the Chern classes of the tangent bundle. Its status is not resolved in the supplied source.

References

Primary source

Ulrike Riess, “On the Chow ring of birational irreducible symplectic varieties”, arXiv:1304.4404 (2014).

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