Vishik's conjecture on local Chow groups and numerical equivalence

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Let kk be a flexible field. The local Chow groups are the groups obtained from the local Chow theory over kk, while Ch⁡Num∗\operatorname{Ch}^*_{Num} denotes Chow groups with Fp\mathbb{F}_p-coefficients modulo numerical equivalence. Vishik's conjecture. Over a flexible field, these two cohomology theories coincide:

Ch⁡k/k∗=Ch⁡Num∗.\operatorname{Ch}^*_{k/k}=\operatorname{Ch}^*_{Num}.

The conjecture would identify isotropic or local Chow motives with numerical Chow motives. The paper establishes a natural surjection from the isotropic Chow groups to the numerical ones, but does not prove that this surjection is an isomorphism over flexible fields.

References

Primary source

Alexander Vishik, “Isotropic motives”, arXiv:1904.09263 (2020).

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