# \varepsilon

The ε symbol (Greek small letter epsilon, U+03B5), written as \varepsilon in LaTeX math mode.

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

## Metadata

| Field | Value |
| --- | --- |
| Topic | [Greek letters](https://texform.dev/latex/topics/greek) |
| Packages | base |
| Allowed mode | math |
| Glyph | ε |
| Unicode | U+03B5 GREEK SMALL LETTER EPSILON |
| Delimiter | No |

## Syntax

```latex
\varepsilon
```

Takes no arguments.

## Common tasks

### How to write a lunate epsilon

```latex
\varepsilon
```

[Open in Playground](https://play.texform.dev/?input=%5Cvarepsilon)

### How to write a small error term

```latex
x_n = x+\varepsilon_n
```

[Open in Playground](https://play.texform.dev/?input=x_n+%3D+x%2B%5Cvarepsilon_n)

### How to contrast the two epsilon glyphs

```latex
\varepsilon\neq\epsilon
```

[Open in Playground](https://play.texform.dev/?input=%5Cvarepsilon%5Cneq%5Cepsilon)

## Usage frequency

4.15% of formulas in the measured corpus contain this entry, rank 27 of 474 entries with frequency data.

## In TeXForm

TeXForm parses this entry as a character leaf mapped to U+03B5 (GREEK SMALL LETTER EPSILON).