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Unfoldable Cardinals and the GCH
Joel David Hamkins
The Journal of Symbolic Logic
Vol. 66, No. 3 (Sep., 2001), pp. 1186-1198
Published by: Association for Symbolic Logic
Stable URL: http://www.jstor.org/stable/2695100
Page Count: 13
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Unfoldable cardinals are preserved by fast function forcing and the Laver-like preparations that fast functions support. These iterations show, by set-forcing over any model of ZFC, that any given unfoldable cardinal κ can be made indestructible by the forcing to add any number of Cohen subsets to κ.
The Journal of Symbolic Logic © 2001 Association for Symbolic Logic