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Aleph one facts for kids

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Aleph one, written as \aleph_1, is an infinite cardinal number following aleph null (\aleph_0). It is the cardinality (size) of the set of numbers of possible arrangements for all countably infinite sets. Under continuum hypothesis, it is also the cardinality of the real numbers. Aleph one is followed by aleph two, \aleph_2.

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