Editing Element (mathematics) (section)

==Cardinality of sets==
{{main|Cardinality}}
The number of elements in a particular set is a property known as [[cardinality]]; informally, this is the size of a set.<ref>{{Cite web|title=Sets - Elements {{!}} Brilliant Math & Science Wiki|url=https://brilliant.org/wiki/sets-elements/|access-date=2020-08-10|website=brilliant.org|language=en-us}}</ref> In the above examples, the cardinality of the set&nbsp;''A'' is&nbsp;4, while the cardinality of set ''B'' and set ''C'' are both&nbsp;3. An infinite set is a set with an infinite number of elements, while a [[finite set]] is a set with a finite number of elements. The above examples are examples of finite sets. An example of an infinite set is the set of positive integers {{math|{{mset|1, 2, 3, 4, ...}}}}.