The Complexity of the Core Model
classification
🧮 math.LO
keywords
complexitycoremodelisomorphicomegastatementabsolutenessdelta
read the original abstract
We use the Sigma^1_3 absoluteness theorem to show that the complexity of the statement "(omega,E)$ is isomorphic to an initial segment of the core model" is Pi^1_4, and that the complexity of the statement "(omega,E)$ is isomorphic to a member of the core model" is Delta^1_5.
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