Kuznetsov's homological projective duality conjecture for Pfaffian varieties

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Let WW be a vector space of dimension 2n2n. For 1≤k≤n−11\le k\le n-1, let Pf⁡k(W∗)⊂P(Λ2W∗)\operatorname{Pf}_k(W^*)\subset\mathbb{P}(\Lambda^2W^*) be the variety of skew-forms of rank at most 2n−2k2n-2k, and let Pf⁡~k(W∗)\widetilde{\operatorname{Pf}}_k(W^*) denote a categorical resolution of singularities. Kuznetsov's conjecture. The Pfaffian varieties Pf⁡k(W∗)\operatorname{Pf}_k(W^*) admit categorical resolutions of singularities Pf⁡~k(W∗)\widetilde{\operatorname{Pf}}_k(W^*) such that

Pf⁡~k(W∗)\widetilde{\operatorname{Pf}}_k(W^*)

is Homologically Projectively Dual to Pf⁡~n−1−k(W)\widetilde{\operatorname{Pf}}_{n-1-k}(W). In particular, the Grassmannian of lines Gr⁡(2,W)\operatorname{Gr}(2,W) is Homologically Projectively Dual to a certain categorical resolution of singularities Pf⁡~(W∗)\widetilde{\operatorname{Pf}}(W^*) of the Pfaffian hypersurface Pf⁡(W∗)\operatorname{Pf}(W^*). This extends the classical projective-duality relation (Pf⁡k(W∗))∨=Pf⁡n−1−k(W)(\operatorname{Pf}_k(W^*))^\vee=\operatorname{Pf}_{n-1-k}(W); the conjecture was proved for n=3n=3, while the general statement is not resolved in the supplied source.

References

Primary source

A. Kuznetsov, L. Manivel and D. Markushevich, “Abel-Jacobi maps for hypersurfaces and non commutative Calabi-Yau's”, arXiv:0806.1154 (2009).

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