# countable

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Related to countably: Countably additive, Countably compact

## countable

[′kau̇nt·ə·bəl] (mathematics)

Either finite or denumerable. Also known as enumerable.

## countable

(mathematics)A term describing a set which is isomorphic
to a subet of the natural numbers. A countable set has
"countably many" elements. If the isomorphism is stated
explicitly then the set is called "a counted set" or "an
enumeration".

Examples of countable sets are any finite set, the natural numbers, integers, and rational numbers. The real numbers and complex numbers are not

Examples of countable sets are any finite set, the natural numbers, integers, and rational numbers. The real numbers and complex numbers are not

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