Torsion conjecture for Chern classes of flat bundles of geometric origin

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Let XX be a smooth complex quasi-projective variety and let V\mathbb V be a local system of geometric origin on XX. Let (V,∇)(V,\nabla) be the associated algebraic flat vector bundle. Geometric-origin torsion conjecture. All Chern classes of (V,∇)(V,\nabla) are torsion in the Chow ring:

ci(V) is torsion in CH⁡i(X)for every i≥1.c_i(V)\text{ is torsion in }\operatorname{CH}^i(X)\quad\text{for every }i\geq 1.

This is presented as a strengthening of Esnault's conjecture on Chern classes of Gauss–Manin connections and would imply the properly rigid case assuming Simpson's geometric-origin conjecture. It remains open in general.

References

Primary source

Adrian Langer, “On algebraic Chern classes of flat vector bundles”, arXiv:2107.03127 (2021).

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