denumerable

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denumerable

Where it comes from

The word was introduced around the beginning of the 20th century, from Latin denumerō (“to count out”) + -able.

adjective

not comparable Capable of being assigned a bijection to the natural numbers. Applied to sets which are not finite, but have a one-to-one mapping to the natural numbers. The empty set is not denumerable because it is finite; the rational numbers are, surprisingly, denumerable because every possible fraction can be assigned a natural number and vice versa.
Similar: countable, countably infinite

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MLA

"denumerable." Wiktionary, via Micwyn, micwyn.com/word/denumerable. Accessed 6 Nov. 2026.

APA

denumerable. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/denumerable

Chicago

"denumerable." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/denumerable.

BibTeX

@misc{denumerable_2026,
  title = {denumerable},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/denumerable},
  urldate = {2026-11-06}
}