Landau–Ginzburg Hodge-number equality for Fano-type models

Let (Y,w)(Y,w) be a Landau–Ginzburg model of Fano type, with Landau–Ginzburg Hodge numbers hp,q(Y,w)h^{p,q}(Y,w), fp,q(Y,w)f^{p,q}(Y,w), and ip,q(Y,w)i^{p,q}(Y,w) as defined in the paper. Landau–Ginzburg Hodge-number conjecture. For every p,qp,q there are equalities

hp,q(Y,w)=fp,q(Y,w)=ip,q(Y,w).h^{p,q}(Y,w)=f^{p,q}(Y,w)=i^{p,q}(Y,w).

This conjecture refines the equality of the sums of the three kinds of Hodge numbers. The source notes that the assertion fails for the Landau–Ginzburg model of P2\mathbb P^2, so the conjecture as stated is refuted.

Sources & referencesView supporting material

Primary source

Valery Lunts and Victor Przyjalkowski, “Landau-Ginzburg Hodge numbers for mirrors of del Pezzo surfaces”, arXiv:1607.08880 (2018).

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