Cardinal number
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In mathematics, cardinal numbers, or cardinals for short, are a generalization of the natural numbers used to measure the cardinality (size) of sets. The cardinality of a finite set is a natural number – the number of elements in the set. The transfinite cardinal numbers describe the sizes of infinite sets.
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See also
- Counting
- Names of numbers in English
- Large cardinal
- Inclusion-exclusion principle
- Nominal number
- Ordinal number
- Regular cardinal
- The paradox of the greatest cardinal
- Aleph number
- Beth number
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