Такође погледајте: א
Introduced by Georg Cantor, based on the Хебрејски letter א, initial letter of אינסוף (infinity).
ℵ (English symbol name aleph)
- (set theory) Symbol for the cardinality of a well-orderable infinite set.
- Unicode has two code points for the Hebrew letter aleph. For Hebrew text, א should be used. This character should be used for the mathematical symbol since it retains the left-to-right orientation of the text.
- ℵ0: aleph-null, aleph-zero
- ℵ1: aleph-one