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Concept information

set theory > set > infinite set > cocountable subset

Terme préférentiel

cocountable subset  

Définition

  • In mathematics, a cocountable subset of a set X is a subset Y whose complement in X is a countable set. In other words, Y contains all but countably many elements of X. Since the rational numbers are a countable subset of the reals, for example, the irrational numbers are a cocountable subset of the reals. If the complement is finite, then one says Y is cofinite.
    (Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Cocountability)

Concept générique

Synonyme(s)

  • cocountability

Traductions

URI

http://data.loterre.fr/ark:/67375/PSR-WDT87477-Q

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RDF/XML TURTLE JSON-LD Date de création 21/08/2023, dernière modification le 18/10/2024