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[[Category:Basic tools]] [[Category:Set theory]] [[Category:Notation]]

If $A$ is a [[set]], then $x [[∈]] A$ means $x$ "is in" $A$, or $x$ "is an element of" $A$.

Similarly, <math>x [[∉]] A</math> means $x$ is not in $A$.

The [[LaTeX]] symbols are <code>\in</code> and <code>\notin</code>.

See [[Set]] for more information.

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