Element: Difference between revisions
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== See Also == | == See Also == | ||
* [[Cardinality]] | * [[Cardinality]] | ||
[[Set theory]] | |||
Revision as of 10:11, 3 December 2007
This article is a stub. Help us out by expanding it.
An element, also called a member, is an object contained within a set or class.
means set 
contains the elements 1, 2, 3 and 4.
To show that an element is contained within a set, the 
symbol is used. If 
, then 
.
The opposite of this would be 
, which means the element is not contained within the set.
Elements Within Elements
Elements can also be sets. For example, 
. The elements of 
are not 1, 2, 3, and 4. Actually, there are only three elements of : 
, 
, and the set 
.
