🌐EnglishEnglishEspañolFrançaisPortuguês한국어中文日本語EntityQ2859736· pop 7· linked from 50 articlestreepartially ordered set such that, for any element, the subset of elements less than it is well-orderedWikidata factsImageInfinite set-theoretic tree.pngSources (3)wikidata.orgdocs.openalex.orgweb.archive.orgvia Wikidata · CC0Available in 7 languagesEspañolFrançais中文PortuguêsSlovenian한국어via Wikidata sitelinks · CC0ConnectionstreeEntityZermelo–Fraenkel set theoryEntityCategoriesSet theoryTrees (set theory)