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Aleph-zero

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A cardinal number which is the cardinality of all countably-infinite sets. Denoted by $\aleph_0$.

How to Cite This Entry:
Aleph-zero. Encyclopedia of Mathematics. URL: http://www.encyclopediaofmath.org/index.php?title=Aleph-zero&oldid=31383
This article was adapted from an original article by P.S. Aleksandrov (originator), which appeared in Encyclopedia of Mathematics - ISBN 1402006098. See original article