<mathematics> The number of elements in a set. If two sets have the same number of elements (i.e. there is a bijection between them) then they have the same cardinality. A cardinality is thus an isomorphism class in the category of sets.
aleph 0 is defined as the cardinality of the first infinite ordinal, omega (the number of natural numbers).
(1995-03-29)
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Nearby terms: Cardbox for Windows « Cardbus « card creep « cardinality » cardinal number » CARDS » card walloper
