# countable

(redirected from*countably*)

Also found in: Dictionary, Thesaurus, Wikipedia.

Related to countably: Countably additive, Countably compact

## countable

[′kau̇nt·ə·bəl] (mathematics)

Either finite or denumerable. Also known as enumerable.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## 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

This article is provided by FOLDOC - Free Online Dictionary of Computing (

**foldoc.org**)Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.

Link to this page: