Homologically trivial cycles are admissible cycles

Let XX be a smooth projective variety over the finitely generated field KK, and let CHli(X)CH^i_l(X) denote the subgroup of cycles homologically equivalent to zero for ll-adic cohomology, where lcharkl\ne\operatorname{char} k. Let CHi(X)(0)CH^i(X)^{(0)} be the subgroup of admissible cycles defined in Proposition 7. Homological admissibility conjecture. One has the inclusion

CHli(X)CHi(X)(0).CH^i_l(X)\subseteq CH^i(X)^{(0)}.

The paper states this inclusion as a consequence of the numerical equivalence conjecture. Its general validity is therefore unresolved unless that preceding conjecture is established.

Sources & referencesView supporting material

Primary source

Bruno Kahn and with an appendix by Qing Liu, “Refined height pairing”, arXiv:2009.00533 (2023).

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