CARDINALITY

Cardinality

In mathematics, the cardinality of a set is a measure of the "number of elements of the set". For example, the set A = {2, 4, 6} contains 3 elements, and therefore A has a cardinality of 3. There are two approaches to cardinality – one which compares sets directly using bijections and injections, and another which uses cardinal numbers.

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cardinality

Noun

  1. Of a set, the number of elements it contains.
    The empty set has a cardinality of zero.
  2. The property of a relationship between a database table and another one, specifying whether it is one-to-one, one-to-many, many-to-one, or many-to-many.


The above text is a snippet from Wiktionary: cardinality
and as such is available under the Creative Commons Attribution/Share-Alike License.

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