Difference between revisions of "Element"
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The opposite of this would be <math>\notin</math>, which means the element is not contained within the [[set]]. | The opposite of this would be <math>\notin</math>, which means the element is not contained within the [[set]]. | ||
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| + | === Elements Within Elements === | ||
| + | |||
| + | Elements can also be [[set]]s. For example, <math>B = \{1,\,2,\,\{3,\,4\}\}</math>. The elements of <math>B</math> are not 1, 2, 3, and 4. Actually, there are only three elements of <math>B</math>: 1, 2, and the [[set]] <math>\{3,\,4\}</math>. | ||
==See Also== | ==See Also== | ||
* [[Set]] | * [[Set]] | ||
Revision as of 23:39, 30 October 2006
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 : 1, 2, and the set 
.
