Tower Sealing in generic extensions of hod pairs with reflecting strong cardinals

From papers

Let (P,Ψ)({\mathcal{P}},\Psi) be a hod pair such that

P“there is a strong cardinal which reflects the class of strong cardinals and there is a proper class of Woodin cardinals”.{\mathcal{P}}\vDash “\text{there is a strong cardinal which reflects the class of strong cardinals and there is a proper class of Woodin cardinals}”.

Let κ\kappa be the least strong cardinal which reflects the class of strong cardinals, and let gColl(ω,κ+)g\subseteq\operatorname{Coll}(\omega,\kappa^+) be generic. Tower Sealing conjecture.

P[g]δ if δ is Woodin, then Tower Sealing holds at δ.{\mathcal{P}}[g]\vDash “\forall\delta\ \text{if }\delta\text{ is Woodin, then Tower Sealing holds at }\delta”.

This conjecture proposes that Tower Sealing holds at every Woodin cardinal in the indicated generic extension, in the setting where strong cardinals reflect the class of strong cardinals. The preceding discussion explains that the argument in the paper does not cover this case and that a different proof is required; the conjecture is presented as a natural direction for extending the result.

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Sources & referencesView supporting material

Primary source

Grigor Sargsyan and Nam Trang, “Partial Tower Sealing”, arXiv:2512.06323 (2025).

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