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Full reflection of stationary sets below aleph_omega

Thomas Jech, Saharon Shelah

Published 1990-01-15Version 1

It is consistent that for every n >= 2, every stationary subset of omega_n consisting of ordinals of cofinality omega_k where k = 0 or k <= n-3 reflects fully in the set of ordinals of cofinality omega_{n-1}. We also show that this result is best possible.

Journal: J. Symbolic Logic 55 (1990), 822--830
Categories: math.LO
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