cardinality
cardinality - English
Noun
cardinality (plural cardinalities)
- (set theory, of a set) The number of elements a given set contains.
- Synonym: power
- The empty set has a cardinality of zero.
- (type theory) The number of terms that can inhabit a type; the possible values of a type.
- (data modeling, databases) 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.
- (religion) The status of being cardinalitial
Usage notes
(set theory): The cardinality of an infinite set is an infinite cardinal number. The smallest such number, called aleph-null and denoted ℵ₀, describes the natural numbers; the next is aleph-one. The cardinality of the real numbers is greater than aleph-null, though whether it is equal to aleph-one is the subject of the continuum hypothesis.
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