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In mathematics, a set is called '''countable''' if it can be numbered in such a way that every element will eventually receive a unique number.
In mathematics, a set is called '''countable''' if it can be numbered in such a way that every element will eventually receive a unique number.
[[Georg Cantor]] developed the concept of countability -- and lack of countability -- in the late 19th century.
[[Georg Cantor]] developed the concept of countability—and lack of countability—in the late 19th century.
==Examples of Countable Sets==
==Examples of Countable Sets==