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On tree ideals

Martin Goldstern, Miroslav Repicky, Saharon Shelah, Otmar Spinas

math.LOarXiv:math/9311212

Abstract

Let l0 and m0 be the ideals associated with Laver and Miller forcing, respectively. We show that add (l0) < cov(l0) and add (m0) < cov(m0) are consistent. We also show that both Laver and Miller forcing collapse the continuum to a cardinal <= h .

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