Symbols:Set Theory/Element

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Element

$\in$


Let $S$ be a set.


An element of $S$ is a member of $S$.


The $\LaTeX$ code for \(x \in S\) is x \in S .


Negation

$\notin$

To denote the statement that $x$ is not an element of a set $S$, we can write:

$x \notin S$


The $\LaTeX$ code for \(x \notin S\) is x \notin S .


Sources