Orbifold KKP conjecture for nef-anticanonical orbifolds

Let XX be an orbifold with nef anticanonical divisor, and let (Uˇ,w)(\check{U},w) be a homological mirror Landau–Ginzburg model to XX. For p,qZp,q\in\mathbb{Z}, let horbp,q(X)h^{p,q}_{\mathrm{orb}}(X) and forbp,q(Uˇ,w)f^{p,q}_{\mathrm{orb}}(\check{U},w) denote the corresponding orbifold Hodge and irregular Hodge numbers.

Orbifold KKP conjecture. One should have

horbp,q(X)=forbdp,q(Uˇ,w).h^{p,q}_{\mathrm{orb}}(X)=f^{d-p,q}_{\mathrm{orb}}(\check{U},w).

This is the orbifold generalization of the Katzarkov–Kontsevich–Pantev conjecture, extending the expected Hodge-number correspondence to varieties with orbifold singularities and nef anticanonical divisor. The source presents it as a conjecture following its discussion of the ordinary KKP relation.

Sources & referencesView supporting material

Primary source

Andrew Harder and Sukjoo Lee, “Irregular Hodge numbers of stacky Clarke mirror pairs”, arXiv:2408.09016 (2025).

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