Kähler package conjecture for corrected perverse objects of conifold degenerations

From papers

Let π:XΔ\pi:\mathcal X\to\Delta be a projective conifold degeneration, and let P\mathcal P be the corrected perverse object constructed from nearby and vanishing cycles. Suppose there exists a polarizable mixed Hodge module

PHMHM(X0)\mathcal P^H\in MHM(X_0)

whose underlying rational perverse sheaf is P\mathcal P. Kähler-package conjecture. The hypercohomology groups

Hk(X0,P)\mathbb H^k(X_0,\mathcal P)

should satisfy a Kähler-type package analogous to that of intersection cohomology, including duality, Lefschetz-type isomorphisms, and Hodge–Riemann bilinear relations. The expected result extends the Hodge-theoretic properties of intersection cohomology to the corrected perverse object; the source states that these properties remain conjectural because a mixed-Hodge-module realization of P\mathcal P has not been established.

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Sources & referencesView supporting material

Primary source

Abdul Rahman, “Finite-Node Perverse Schobers and Corrected Extensions for Conifold Degenerations”, arXiv:2604.06597 (2026).

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