# Aleph-0/Related Articles

< Aleph-0

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*See also changes related to Aleph-0, or pages that link to Aleph-0 or to this page or whose text contains "Aleph-0".*

## Parent topics

- Cardinality [r]: The size, i.e., the number of elements, of a (possibly infinite) set.
^{[e]} - Cardinal number [r]: The generalization of natural numbers (as means to count the elements of a set) to infinite sets.
^{[e]}

## Subtopics

- Countable set [r]: A set with as many elements as there are natural numbers, or less.
^{[e]}

- Continuum hypothesis [r]: A statement about the size of the continuum, i.e., the number of elements in the set of real numbers.
^{[e]} - Natural number [r]: An element of 1, 2, 3, 4, ..., often also including 0.
^{[e]}