of f. A has cardinality less than or equal to the cardinality of B, if there exists an injective function from A into B. A has cardinality strictly less...
23 KB (2,925 words) - 20:33, 24 May 2024
rank among the infinite cardinals. Cardinality is defined in terms of bijective functions. Two sets have the same cardinality if, and only if, there is...
26 KB (3,808 words) - 01:08, 27 April 2024
In set theory, the cardinality of the continuum is the cardinality or "size" of the set of real numbers R {\displaystyle \mathbb {R} } , sometimes called...
16 KB (2,373 words) - 14:10, 10 July 2024
term cardinality refers to the uniqueness of data values contained in a particular column (attribute) of a database table. The lower the cardinality, the...
3 KB (410 words) - 17:35, 14 November 2021
Aleph number (category Cardinal numbers)
aleph (ℵ). The cardinality of the natural numbers is ℵ0 (read aleph-nought or aleph-zero or aleph-null), the next larger cardinality of a well-ordered...
16 KB (1,961 words) - 08:08, 8 June 2024
Within data modelling, cardinality is the numerical relationship between rows of one table and rows in another. Common cardinalities include one-to-one,...
7 KB (629 words) - 12:24, 20 May 2024
Look up cardinality in Wiktionary, the free dictionary. Cardinality may refer to: Cardinality of a set, a measure of the "number of elements" of a set...
535 bytes (116 words) - 14:46, 2 November 2021
Set (mathematics) (section Cardinality)
statement that there is no set with cardinality strictly between the cardinality of the natural numbers and the cardinality of a straight line. In 1963, Paul...
41 KB (4,747 words) - 09:15, 3 July 2024
Calculating the exact cardinality of the distinct elements of a multiset requires an amount of memory proportional to the cardinality, which is impractical...
13 KB (1,874 words) - 18:44, 14 March 2024
Continuum hypothesis (category Cardinal numbers)
numbers is the same size (cardinality) as the set of integers: they are both countable sets. Cantor gave two proofs that the cardinality of the set of integers...
31 KB (3,962 words) - 18:18, 2 July 2024