Countability
A set, which should be thought of simply as a collection of objects, is called countable if it either consists of a finite number of objects or if the objects can be put in one to one cor...
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Denumerable
A denumerable (or countable) set is one for which there is a correspondence from the set to N, the set of natural numbers. To put it in another way: the cardinality of the set is equal to ...
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Countability
Denumerable