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Cardinality of a Finite Set
publish date: 2026/05/23 21:45:31.998201 UTC
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The cardinality (cardinal number) of a finite set is:
Correct Answer
The number of elements in the set
Explanation
The cardinal number of a finite set is simply the count of its elements. For example, \(A = \{a, b, c, d, e\}\) has cardinal number 5. Cardinal numbers extend naturally to infinite sets, where they capture different degrees of infinity rather than simple counts.
Reference
Introduction to Differential Calculus (Systematic Studies with Engineering Applications for Beginners) - 2012