SUCCESSIVE FAILURES OF APPROACHABILITY

Unger, S

Unger, S (corresponding author), Univ Toronto, Dept Math, 40 St George St, Toronto, ON M5S 2E4, Canada.

ISRAEL JOURNAL OF MATHEMATICS, 2021; 242 (2): 663

Abstract

Motivated by showing that in ZFC we cannot construct a special Aronszajn tree on some cardinal greater than N-1, we produce a model in which the appro......

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