Submitted by György Chityil ... on Fri, 01/19/2018 - 18:14 Hierarchy: NounDescription: {{set theory}} For some set ''X'', the least ordinal ''?'' such that there is no injection from ''?'' into ''X''.Ngram: Hartogs numberNgram Text: Hartogs numberSource: WiktionaryIssue: 0Wiktionary tag: set theoryNgram Count: 2