The natural hierarchy and quasi-hierarchy of constructibility degrees

Journal of Symbolic Logic 51 (1):130-134 (1986)
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Abstract

We investigate the set S 2 of "quickly sharped" reals: \begin{align*}S_2 &= \{x \mid x \in M, M \text{the} <^\ast-\text{least mouse} \not\in L\lbrack x\rbrack\} \\ &= \{x \mid L\lbrack x\rbrack \models "V = K"\},\\ \end{align*} in the manner of [K] defining a natural hierarchy and quasi-hierarchy of constructibility degrees and identifying their termination points

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10.2307/2273949

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