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Cardinal preserving ideals

We give some general criteria, when kappa-complete forcing preserves largeness properties -- like kappa-presaturation of normal ideals on lambda (even when they concentrate on small cofinalities). Then we quite accurately obtain the consistency strength ``NS_lambda is aleph_1-preserving'', for lambda > aleph_2 .

4 nodes3 linksoverview mapCardinal preserving ideals
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Co-authorshipAuthorshipAuthorshipTopic signalWCardinal preserving idealspreprint / 1996AMoti GitikResearcherASaharon ShelahResearcherTmath.LO1661 works
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Cardinal preserving ideals

preprint / 1996

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