Aleph Nought

The cardinality of the integers, whole numbers, and rationals. See SetTheory and/or TransfiniteCardinality for more.

is also known as aleph-null, aleph-zero.

See also SurrealNumbers by DonaldErvinKnuth

An old math joke related to the concept:

AlephNought bottles of beer on the wall, AlephNought bottles of beer,

Take one down, pass it around, AlephNought bottles of beer on the wall.

CategoryMath