The set theory symbol (
) for the cardinal number
of a well-orderable infinite set.
Aleph
See also
Aleph-0, Aleph-1, Countable Set, Countably Infinite, Finite, Infinite, Transfinite Number, Uncountably InfiniteExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Aleph." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Aleph.html