File:Apples_and_Oranges_v2.png · Wikimedia Commons · See Wikimedia Commons
ภาวะเชิงการนับ
Sign in to saveAlso known as size, number of elements, cardinality of a set, set cardinality, size of a set
thumb|318x318px|A one-to-one correspondence between a set of apples and a set of oranges shows they have the same cardinality. In mathematics, cardinality is an inherent property of sets, roughly meaning the number of individual objects they contain, which may be infinite. The concept is understood through one-to-one correspondences between sets. That is, if their objects can be paired such that each object has a pair, and no object is paired more than once.
Cardinality is a mathematical property that describes how many individual objects are in a set, whether that number is finite or infinite. It's determined by checking if the objects in two sets can be paired up perfectly—if every object in one set matches with exactly one object in another set with nothing left over, then the sets have the same cardinality.
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In the Vinony graph
Vinony's link graph records 797 inbound references to ภาวะเชิงการนับ, and connects out to bijection, cardinal number and subset.
It sits within the topics Basic concepts in infinite set theory and Cardinal numbers.
Vinony links it to 55 Wikipedia language editions.
Wikidata facts
Show 6 more facts
- Commons category
- Cardinality
- notation
- number sign
- studied by
- set theory
- name
- cardinality
- invariant under
- bijection
- narrower external class
- https://www.w3.org/2002/07/owl#minCardinality
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