EnglishEdit
Proper nounEdit
 (set theory) The first of the transfinite cardinal numbers; corresponds to the number of positive integers, also called natural numbers. Georg Cantor showed that even all the rational numbers could be put in onetoone correspondence with them, and are therefore countable, enumerable or denumerable.
SynonymsEdit
 (first transfinite cardinal number): alephnaught, alephnought, alephzero, ℵ₀
Related termsEdit
TranslationsEdit
first of the transfinite cardinal numbers
