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Preserving the Ultrapower Axiom by Forcing over Nonoverlapping Extender Models

Kaplan, Eyal
arXiv (All) · Papers
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logic
We identify a class of simple yet nontrivial forcing notions that preserve the Ultrapower Axiom (UA) over canonical inner models, reaching the level of a strong cardinal. The forcings we consider are discrete product forcings whose index sets are chosen and spaced according to the structure of the u
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