Bloch's conjecture on zero-cycles and vanishing holomorphic forms

Let XX be a smooth, projective variety over C\mathbb{C}, and write hp,0(X)h^{p,0}(X) for the Hodge number measuring global holomorphic pp-forms. Bloch's conjecture. If

hp,0(X)=0h^{p,0}(X)=0

for every p1p\geq 1, then

CH0(X)Z.\operatorname{CH}_0(X)\cong \mathbb{Z}.

This is the converse to the implication from triviality of the zero-cycle group to vanishing holomorphic forms; it is known in several cases but remains open in general.

Sources & referencesView supporting material

Primary source

Haoyang Liu and Biman Roy, “Vector Bundles on Rational Topologically Contractible Affine Threefolds”, arXiv:2607.05444 (2026).

Additional references

35 papers in this index state this conjecture (1999–2026). The statement above is taken from the most recent of them; the others are arXiv:2606.22323, arXiv:2601.10309, arXiv:2601.00390, arXiv:2512.12451, arXiv:2501.10058, arXiv:2407.19488, arXiv:2404.13607, arXiv:2402.13793, arXiv:2305.10078, arXiv:2303.05030, arXiv:2205.07461, arXiv:2201.06152, and 22 more.

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