Full reflection of stationary sets below ℵω

Journal of Symbolic Logic 55 (2):822 - 830 (1990)
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Abstract

It is consistent that, for every n ≥ 2, every stationary subset of ω n consisting of ordinals of cofinality ω k, where k = 0 or k ≤ n - 3, reflects fully in the set of ordinals of cofinality ω n - 1. We also show that this result is best possible.

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