cardinality is the number of element in a set :)
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The question did not ask what cardinality was but how to find it!
For a simple set with a finite number of elements it is possible to count the number of distinct elements - even though it may be time consuming. For other finite sets, such as symmetry groups, it is not always easy to identify distinct elements before counting how many there are. However, there are theoretical methods that will help in such cases.
The cardinality of an infinite group is Aleph-Null if it there is a 1-to-1 mapping with the set of integers. The cardinality is Aleph-One if the mapping is with the real numbers.
If you go beyond that, you will have studied a lot more about cardinality and will not need to ask such a question!
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The cardinality of [0,1) is equal to the cardinality of (0,1) which has the same cardinality as the real numbers.
Cardinality is the number of attributes in the table.
The cardinality of a set is its size. For instance, since the set G contains 4 elements, then its cardinality is 4. So if the set has a finite number of elements (meaning it is a finite set), you can find its cardinality, otherwise you cannot (meaning it is an infinite set).
The cardinality ratio specifies the number of relationship instances that an entity can participate in.
The cardinality of a finite set is the number of elements in the set. The cardinality of infinite sets is infinity but - if you really want to go into it - reflects a measure of the degree of...