# \dddot

Used for a triple-dot accent, typically for higher-order derivatives or specialized notation.

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

## Metadata

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

## Syntax

### ams

Argument specification: `m`

Used for a triple-dot accent, typically for higher-order derivatives or specialized notation.

### base

Argument specification: `m`

Used to place a triple-dot accent over a math symbol, mainly in specialized derivative notation.

## Examples

```latex
\dddot{x}
```

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

## Package variants

| Package | Argument specification | Allowed mode | Description |
| --- | --- | --- | --- |
| ams | m | math | Used for a triple-dot accent, typically for higher-order derivatives or specialized notation. |
| base | m | math | Used to place a triple-dot accent over a math symbol, mainly in specialized derivative notation. |

## Renderer support

| Package | MathJax | KaTeX | XeTeX |
| --- | --- | --- | --- |
| ams | full | full | full |
| base | full | full | none |

## Usage frequency

<0.01% of formulas in the measured corpus contain this entry, rank 172 of 263 entries with frequency data.

## In TeXForm

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

## 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)
- [\\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)
- [\\widetilde](https://texform.dev/latex/commands/widetilde)

## Test cases

### ams

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

### base

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