Weak p-adic Grothendieck period conjecture

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Let XX be a variety over Q‾\overline{\mathbb{Q}} with good reduction XpX_p at a prime pp. Let Z0Z_0 be the Q\mathbb{Q}-vector space of algebraic classes on XX, let ZpZ_p be the Q\mathbb{Q}-vector space of algebraic classes on XpX_p, and use the comparison embedding into de Rham cohomology. Weak p-adic Grothendieck period conjecture. Is the inclusion

Z0⊂Zp∩HdR∗(X,Q‾)Z_0\subset Z_p\cap H^*_{\mathrm{dR}}(X,\overline{\mathbb{Q}})

an equality? The paper states that the analogous conjecture is false in general in the classical setting, while the p-adic question is posed here as an open problem.

References

Primary source

Giuseppe Ancona, “Some arithmetic and geometric aspects of algebraic cycles and motives”, arXiv:2301.02411 (2023).

Additional references

2 papers in this index state this conjecture (2022–2023). The statement above is taken from the most recent of them; the others are arXiv:2207.09213.

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