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Element

If $x$ is a member of a set $A$, then $x$ is said to be an element of $A$, written $x\in A$. If $x$ is not an element of $A$, this is written $x\not\in A$. The term element also refers to a particular member of a Group, or entry in a Matrix.




© 1996-9 Eric W. Weisstein
1999-05-25