411 REFERENCE · Wiktionary
Kurepa tree
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
en Yugoslav mathematician Đuro Kurepa Đuro Kurepa.
Noun
en math set theory A tree (T, <) of height ω1, each of whose levels is at most countable, and has at least ℵ2 branches.
Hypernyms
en tree
References