ℶ

See also: ב [U+05D1 HEBREW LETTER BET]

Character	ℶ
Unicode name	BET SYMBOL
Code point	U+2136
Entity number	ℶ
Unicode block	Letterlike Symbols
LaTeX input	\beth
← ℵ [U+2135] [U+2137] ℷ →

Translingual

Symbol

ℶ ‎(English symbol name beth)

1. (set theory) Symbol for the cardinality of an infinite set in a iterative hierarchy of power sets, starting with ℵ₀. Usually indexed by an ordinal number.

   $\beth_0=\aleph_0$, $\beth_{\alpha+1}=2^{\beth_{\alpha}},$ and $\beth_\lambda = \sup \{ \beth_\alpha : \alpha < \lambda \}$ for a limit ordinal λ.

See also

• Beth number on Wikipedia.Wikipedia:Beth number
• ℵ

Usage notes

Unicode has two code points for the Hebrew letter beth. For Hebrew text, ב should be used. This character should be used for the mathematical symbol since it retains the left-to-right orientation of the text.