DENUMERABLE — Definition of DENUMERABLE
adjective
1
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.
📚 Source: en.wiktionary.org/wiki/denumerable
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