Generalized Bloch conjecture on support of zero-cycles

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Let XX be a smooth projective complex variety and let mm be a nonnegative integer. Say that CH⁡0(X)\operatorname{CH}_0(X) is supported on an mm-dimensional algebraic subset V⊂XV\subset X when the pushforward map CH⁡0(V)→CH⁡0(X)\operatorname{CH}_0(V)\to\operatorname{CH}_0(X) is surjective. Generalized Bloch conjecture. If

Hp,0(X)=0 for all p>m,H^{p,0}(X)=0\text{ for all }p>m,

then CH⁡0(X)\operatorname{CH}_0(X) is supported on an mm-dimensional algebraic subset of XX. This generalizes Bloch's conjecture by replacing the condition that all positive-degree holomorphic forms vanish with vanishing above degree mm; the source presents it as the relevant generalization for the paper, without giving resolution evidence.

References

Primary source

Kristin DeVleming and David Stapleton, “Maximal Chow constant and cohomologically constant fibrations”, arXiv:1909.01483 (2019).

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