Wilson's conjecture on the Solovay ordinal of a derived model

From papers

Let VV satisfy PFA, let κ\kappa be a limit of Woodin cardinals, and let D(V,κ)D(V,\kappa) denote the derived model at κ\kappa. Let ΘD(V,κ)\Theta^{D(V,\kappa)} be its Solovay ordinal. Wilson's conjecture. If VV satisfies PFA and κ\kappa is a limit of Woodin cardinals, then

ΘD(V,κ)<κ+.\Theta^{D(V,\kappa)} < \kappa^+.

The conjecture asks for a bound on the full Solovay ordinal of the derived model, extending the paper's proved bounds at earlier levels of the Solovay hierarchy. The supplied source presents it as unresolved.

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Sources & referencesView supporting material

Primary source

Derek Levinson and Nam Trang, “Derived Models in PFA”, arXiv:2501.05954 (2025).

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