Hilbert's hotel/Related Articles
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- See also changes related to Hilbert's hotel, or pages that link to Hilbert's hotel or to this page or whose text .
- Cardinality : The size, i.e., the number of elements, of a (possibly infinite) set.
- Countable set : A set with as many elements as there are natural numbers, or less.
- Galileo's paradox : The observation that there are fewer perfect squares than natural numbers but also equally many.