The canary tree

Details The canary tree The canary tree

1993-08-15

arxiv.org/abs/math/9308210v1

Canad. J. Math. 36 (1993), 209-215

Mathematics

Logic

Scientific paper

A canary tree is a tree of cardinality the continuum which has no
uncountable branch, but gains a branch whenever a stationary set is destroyed
(without adding reals). Canary trees are important in infinitary model theory.
The existence of a canary tree is independent of ZFC + GCH.

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