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See also: ב [U+05D1 HEBREW LETTER BET]
Unicode name BET SYMBOL
Code point U+2136
Unicode block Letterlike Symbols
LaTeX input \beth
[U+2135] [U+2137]



(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[edit]

Usage notes[edit]

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.