The tree property at successors of singular cardinals

by Magidor and Shelah. [MgSh:324]
Archive for Math Logic, 1996
Assuming some large cardinals, a model of ZFC is obtained in which aleph_{omega+1} carries no Aronszajn trees. It is also shown that if lambda is a singular limit of strongly compact cardinals, then lambda^+ carries no Aronszajn trees.

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