# \notin

The ∉ symbol (Not an element of, U+2209), written as \notin in LaTeX math mode.

https://texform.dev/latex/symbols/notin

## Metadata

| Field | Value |
| --- | --- |
| Topic | [Negated relations](https://texform.dev/latex/topics/negated-relations) |
| Packages | base |
| Allowed mode | math |
| Glyph | ∉ |
| Unicode | U+2209 NOT AN ELEMENT OF |
| Delimiter | No |

## Syntax

```latex
\notin
```

Takes no arguments.

## Usage frequency

0.20% of formulas in the measured corpus contain this entry, rank 112 of 474 entries with frequency data.

## In TeXForm

TeXForm parses this entry as a character leaf mapped to U+2209 (NOT AN ELEMENT OF).