Jech–Kunen tree
From Infogalactic: the planetary knowledge core
In mathematics, a Jech–Kunen tree is a tree of power ω1 and height ω1 in which the number of branches is greater than ω1 and less than 2ω1. They are named after Thomas Jech (1971) who found the first example, and Kenneth Kunen (1975) who related them to the cardinalities of compact spaces.
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