Element of symbol (∈) in LaTeX

Element of symbol (∈)

Set theory

∈

LaTeX command

\in

is an element of

Use inside math mode: $\in$ — base LaTeX, KaTeX and MathJax

\in is one of the most typed symbols in mathematics. \notin is its negation and \ni the reversed form, read 'contains'. All three are in base LaTeX.

All ways to write it

Command	Use	Package
`\in`	is an element of	none
`\notin`	is not an element of, ∉	none
`\ni`	contains as element, ∋	none

Example

\forall x \in \mathbb{R},\; x^2 \geq 0

A universally quantified statement over the reals.

Questions

How do I write 'not an element of'?

\notin. It is built in; you do not need \not\in.

Related symbols

Subset ⊆ \subseteq
For all ∀ \forall
There exists ∃ \exists
Real numbers ℝ \mathbb{R}

Using element of in Confluence

Confluence Cloud has no built-in LaTeX. With LaTeX Math for Confluence you add a math macro to any page, type \in and it renders inline or as a block, with a live preview while you edit. Every command on this page renders there without extra packages.