Debarre–Voisin realization conjecture for Hilbert squares of genus 16 K3 surfaces

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Let (S,h)(S,h) be a general polarized K3 surface of genus 1616, let S′S' be its unique nontrivial Fourier–Mukai partner, and let V10V_{10} and V10′V_{10}' be the rank 1010 vector spaces constructed from SS and S′S', respectively. Let t1∈∧3V10∗t_1\in\wedge^3 V_{10}^* be the trivector corresponding to the trivector t2′∈∧3V10′t_2'\in\wedge^3 V_{10}' constructed from S′S'. For a trivector t1∈∧3V10∗t_1\in\wedge^3 V_{10}^*, write DV(t1)⊂G(6,V10)DV(t_1)\subset G(6,V_{10}) for the associated Debarre–Voisin variety. Debarre–Voisin realization conjecture. There exists a canonical isomorphism

S[2]≅DV(t1)⊂G(6,V10).S^{[2]}\cong DV(t_1)\subset G(6,V_{10}).

The conjecture proposes a canonical Debarre–Voisin description of the Hilbert square of a general genus 1616 K3 surface; the supplied text says it has been verified for some examples by computer, but does not state a general proof.

References

Primary source

Junyu Meng, “Hilbert squares of genus 16 K3 surfaces”, arXiv:2510.26488 (2025).

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