Aleph null

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Aleph-naught, the smallest infinite cardinal number

Aleph null (also Aleph naught or Aleph 0) is the smallest infinite number. It is the cardinality (size) of the set of natural numbers (there are aleph null natural numbers). It is also sometimes called Aleph naught.

It is the first infinite number in a series of infinite cardinal numbers. The symbol for Aleph Null is ℵ0.

It is followed by Aleph one.[1]

References[change | change source]

  1. Weisstein, Eric W. "Aleph-0". Retrieved 2020-02-15.