Cofiniteness
id:
cofiniteness-257-10441792
title:
Cofiniteness
text:
In mathematics, a cofinite subset of a set X is a subset A whose complement in X is a finite set. In other words, A contains all but finitely many elements of X . If the complement is not finite, but is countable, then one says the set is cocountable. These arise naturally when generalizing structures on finite sets to infinite sets, particularly on infinite products, as in the product topology or direct sum. This use of the prefix "co" to describe a property possessed by a set's complement is c
brand slug:
wiki
category slug:
encyclopedia
description:
Being a subset whose complement is a finite set
original url:
https://en.wikipedia.org/wiki/Cofiniteness
date created:
date modified:
2024-02-18T17:19:22Z
main entity:
{"identifier":"Q281212","url":"https://www.wikidata.org/entity/Q281212"}
image:
fields total:
13
integrity:
14