Sealing & Pmax
Notes on HOD computation under AD+ and consequences for Σ21 absoluteness.
Notes on HOD computation under AD+ and consequences for Σ21 absoluteness.
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Perhaps the mathematics will turn out some other way. Perhaps the multiverse has no core, but some other, more subtle structure. There are many basic open questions at the foundations of set theory: the extent of generic absoluteness, the existence of iterable structures, the Ω-conjecture, the form of canonical inner models with supercompacts, and the properties of HOD in models of determinacy, to give my own partial list. Our path toward a stronger foundation will be lit by the answers to such questions.
Drafting a preprint on Vopěnka algebra & precipitous ideals on θ (AD+).