Fu–Vial's multiplicative Orlov conjecture

Let XX and XX' be derived equivalent hyper-Kähler varieties. The Chow motive h(X)h(X) is equipped with its cup-product structure, written (h(X),)(h(X),\cup). Fu–Vial's multiplicative Orlov conjecture. There is an isomorphism of Chow motives respecting the cup-product,

(h(X),)(h(X),).(h(X),\cup)\simeq(h(X'),\cup).

This strengthens Orlov's conjecture by requiring compatibility with multiplication. It is known for K3 surfaces, while the higher-dimensional case remains open.

Sources & referencesView supporting material

Primary source

Davesh Maulik, Junliang Shen and Qizheng Yin, “On the Orlov conjecture for hyper-Kähler varieties via hyperholomorphic bundles”, arXiv:2601.20289 (2026).

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