Hartogs number

given a set, the least ordinal such that there is no injection from the ordinal into the set
rdfs:label
"Hartogs number"@en
skos:altLabel
"Hartogs ordinal"@en
schema:description
"given a set, the least ordinal such that there is no injection from the ordinal into the set"@en
schema:dateModified "2026-10-28T18:03:23+00:00"^^xsd:dateTime
schema:version 2561756476
wikibase:identifiers 5
wikibase:sitelinks 10
wikibase:statements 8
p:P12888 wd:statement/Q1186007-2E58A8CC-9838-4572-B154-B42AFC179333
p:P138 wd:statement/Q1186007-9d15c8bd-46d2-daea-2ae1-c33d7a00ca60
p:P279 wd:statement/Q1186007-847ce856-4a74-abb4-fbf7-a65c84900fdf
p:P31 wd:statement/Q1186007-231db148-4427-046b-a122-1551f31b100c
p:P4215 wd:statement/Q1186007-24A3E62F-D52F-449E-95B5-555572231DAF
p:P6366 wd:statement/Q1186007-81FED6A9-5D2C-43B5-8FED-F7BA605E7FCC
p:P646 wd:statement/Q1186007-C0D28B35-AEAB-4F4A-8A73-95A885083585
p:P6781 wd:statement/Q1186007-3396e818-4de0-f5ae-8ece-d2ec072a240c
p:direct-normalized/P6366 <https://makg.org/entity/202634877>
wdt:P12888 "df-har"
wdt:P138 Friedrich Hartogs
wdt:P279 ordinal number
wdt:P31 mathematical concept
wdt:P4215 "Hartogs number"
wdt:P6366 "202634877"
wdt:P646 "/m/08h94y"
wdt:P6781 "Definition:Hartogs_Number"
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data from SPARQL profile: Wikidata