Log Bloch conjecture for smooth algebraic surfaces

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Let UU be a smooth algebraic surface, let pg(U)p_g(U) denote its geometric genus, and let T(U)T(U) be the Albanese kernel, namely the kernel of the Albanese morphism a:h0(U)0→Alb⁡(U)a:h_0(U)^0\to \operatorname{Alb}(U). Log Bloch conjecture. If

pg(U)=0,p_g(U)=0,

then

T(U)=0.T(U)=0.

When UU is projective, this is the classical Bloch conjecture; the paper proves the assertion for open smooth complex surfaces when the Bloch conjecture holds for a compactification, including all Q\mathbb{Q}-homology planes and open smooth surfaces that are not of log general type.

References

Primary source

Qizheng Yin and Yi Zhu, “A^1-equivalence of zero cycles on surfaces II”, arXiv:1512.09079 (2015).

Additional references

2 papers in this index state this conjecture (2015). The statement above is taken from the most recent of them; the others are arXiv:1510.01712.

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Solutions 1

RemarkAI-assistedClaimed by OpenAI. The manuscript claims that the integral degree-zero zero-cycle Albanese map is an isomorphism for every smooth connected projective complex surface with geometric genus zero. This proves the stated Albanese-kernel vanishing in the projective, empty-boundary subcase of log Bloch. Its main theorem treats geometric genus and irregularity both zero.See full solutionHide full solution

Claimed by OpenAI. The manuscript claims that the integral degree-zero zero-cycle Albanese map is an isomorphism for every smooth connected projective complex surface with geometric genus zero. This proves the stated Albanese-kernel vanishing in the projective, empty-boundary subcase of log Bloch. Its main theorem treats geometric genus and irregularity both zero.

GitHub repository: https://github.com/openai/math

Manuscript: https://github.com/openai/math/blob/adc7f1241b42e322a6451854ab7e4b4c146bf78a/preprints/Blochs-Conjecture-for-Surfaces-with-pg-equals-q-equals-0-September-24-2026/paper.pdf

  • OpenAI-040-01-Bloch-s-conjecture-for-surfaces-with-p-g-0.pdf606,566 bytesOpen