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Existence of almost free abelian groups and reflection of stationary set

Saharon Shelah

Published 1996-06-15Version 1

section 2: We answer a question of Mekler Eklof on the closure operations of the incompactness spectrum. We answer a question of Foreman and Magidor on reflection of stationary subsets of S_{< aleph_2}(lambda) = {a subseteq lambda : |a| < aleph_2}]. section 3 - NPT is not transitive. We prove NPT(lambda, mu) + NPT(mu, kappa) not => NPT(lambda, kappa)

Journal: Math. Japon. 45 (1997), 1--14
Categories: math.LO, math.RA
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