The extender algebra and Sigma²₁-absoluteness
classification
🧮 math.LO
keywords
absolutenesswoodinalgebraexistenceextenderproofsigmaaccount
read the original abstract
We present a self-contained account of Woodin's extender algebra and its use in proving absoluteness results, including a proof of the $\Sigma^2_1$-absoluteness theorem. We also include a proof that the existence of an inner model with Woodin limit of Woodin cardinals implies the existence of divergent models of $\AD^+$.
This paper has not been read by Pith yet.
discussion (0)
Sign in with ORCID, Apple, or X to comment. Anyone can read and Pith papers without signing in.