# Aleph

first letter in the Hebrew alphabet

Aleph is the first letter of the Hebrew alphabet.

## Modern uses

• In mathematics, Georg Cantor decided to use alephs to determine the cardinality of infinite sets. These are called aleph numbers, with some of the most notable ones being aleph null (${\displaystyle \aleph _{0}}$ ) and aleph one (${\displaystyle \aleph _{1}}$ ).[1]

## Hebrew alphabet

Aleph ("a" pronounced as "father") has a mute sound and is represented by the symbol "א".[2]

## References

1. "Comprehensive List of Set Theory Symbols". Math Vault. 2020-04-11. Retrieved 2020-10-07.
2. "The Hebrew Alphabet (Aleph-Bet)". www.jewishvirtuallibrary.org. Retrieved 2020-10-07.