Where MA first fails

Journal of Symbolic Logic 53 (2):429-433 (1988)
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Abstract

If θ is any singular cardinal of cofinality ω 1 , we produce a forcing extension in which MA holds below θ but fails at θ. The failure is due to a partial order which splits a gap of size θ in P(ω)

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Citations of this work

Sacks forcing, Laver forcing, and Martin's axiom.Haim Judah, Arnold W. Miller & Saharon Shelah - 1992 - Archive for Mathematical Logic 31 (3):145-161.
Semimorasses and nonreflection at singular cardinals.Piotr Koszmider - 1995 - Annals of Pure and Applied Logic 72 (1):1-23.
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