ThmDex – An index of mathematical definitions, results, and conjectures.
▼ Set of symbols
▼ Alphabet
▼ Deduction system
▼ Theory
▼ Zermelo-Fraenkel set theory
▼ Set
▼ Transitive set
▼ Ordinal number
▼ Cardinal number
▼ Set cardinality
Definition D2184
Set cardinality operation