# \widetilde

Used to place a wider tilde accent over grouped math content.

https://texform.dev/latex/commands/widetilde

## Metadata

| Field | Value |
| --- | --- |
| Topic | [Accents](https://texform.dev/latex/topics/accents) |
| Packages | base |
| Allowed mode | math |
| Tags | decoration |
| Commonality | medium |
| Kind | prefix |

## Syntax

### base

Argument specification: `m`

Used to place a wider tilde accent over grouped math content.

## Common tasks

### How to write a wide tilde over two letters

```latex
\widetilde{AB}
```

[Open in Playground](https://play.texform.dev/?input=%5Cwidetilde%7BAB%7D)

### How to write a lifted or dual map

```latex
\widetilde{f}
```

[Open in Playground](https://play.texform.dev/?input=%5Cwidetilde%7Bf%7D)

### How to tilde a longer operator name

```latex
\widetilde{\mathrm{SL}}_2
```

[Open in Playground](https://play.texform.dev/?input=%5Cwidetilde%7B%5Cmathrm%7BSL%7D%7D_2)

## Examples

```latex
\widetilde{abc}
```

[Open in Playground](https://play.texform.dev/?input=%5Cwidetilde%7Babc%7D)

## Renderer support

| Package | MathJax | KaTeX | XeTeX |
| --- | --- | --- | --- |
| base | full | full | full |

## Usage frequency

2.13% of formulas in the measured corpus contain this entry, rank 27 of 263 entries with frequency data.

## In TeXForm

TeXForm parses this entry as prefix syntax; the package determines its argument specification.

### [base/widetilde-to-tilde](https://texform.dev/rules/base/widetilde-to-tilde)

Drop stretchiness from \widetilde by rewriting it to \tilde.

Level: equiv. Fidelity: math.

```latex
\widetilde{#1}
```

→

```latex
\tilde{#1}
```

```latex
\widetilde{AB}
```

→

```latex
\tilde{AB}
```

## Equivalent forms

```latex
\tilde{#1}
```

approximate. For short bases this is often similar, but \widetilde is intended for wider grouped content.

## See also

- [\\acute](https://texform.dev/latex/commands/acute)
- [\\bar](https://texform.dev/latex/commands/bar)
- [\\breve](https://texform.dev/latex/commands/breve)
- [\\check](https://texform.dev/latex/commands/check)
- [\\ddddot](https://texform.dev/latex/commands/ddddot)
- [\\dddot](https://texform.dev/latex/commands/dddot)
- [\\ddot](https://texform.dev/latex/commands/ddot)
- [\\dot](https://texform.dev/latex/commands/dot)
- [\\grave](https://texform.dev/latex/commands/grave)
- [\\hat](https://texform.dev/latex/commands/hat)
- [\\mathring](https://texform.dev/latex/commands/mathring)
- [\\tilde](https://texform.dev/latex/commands/tilde)
- [\\vec](https://texform.dev/latex/commands/vec)
- [\\widehat](https://texform.dev/latex/commands/widehat)

## Test cases

### base

| Input | Case | MathJax | KaTeX | XeTeX |
| --- | --- | --- | --- | --- |
| \widetilde{a} | Positive: baseline | Pass | Pass | Pass |
| \widetilde a | Positive: bare[0] | Pass | Pass | Pass |