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Ω*1 as an initial segment of the c-degrees
Journal of Symbolic Logic 59 (3):956 - 976 (1994)
Abstract
By an "inverse iteration" of Sacks forcing over a model of V = L, we produce a model in which the degrees of constructibility of nonconstructible reals have order type ω 1 *Other Versions
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Citations of this work
Ulm Classification of Analytic Equivalence Relations in Generic Universes.Vladimir Kanovei - 1998 - Mathematical Logic Quarterly 44 (3):287-303.
References found in this work
Iterated perfect-set forcing.James E. Baumgartner & Richard Laver - 1979 - Annals of Mathematical Logic 17 (3):271-288.
Applications of iterated perfect set forcing.Marcia J. Groszek - 1988 - Annals of Pure and Applied Logic 39 (1):19-53.
Combinatorics on ideals and forcing.Serge Grigorieff - 1971 - Annals of Mathematical Logic 3 (4):363.
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