\ddddot - LaTeX accent command

\ddddot{y}

Renderer support

Package	MathJax	KaTeX	XeTeX
`ams`	MathJax: Full	KaTeX: Full	XeTeX: Full
`base`	MathJax: Full	KaTeX: Full	XeTeX: None

Syntax#

\ddddotm{a}math content

Argspec m — one mandatory argument. Same argspec in ams and base. Reading argspecs

base

\ddddot{x}

Package	Signature	Allowed mode	Notes
`ams`	`m`	math	Used for a four-dot accent, most often in very specialized higher-order derivative notation.
`base`	`m`	math	Used to place a four-dot accent over a math symbol in niche notation.

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

`ams`
Input	Case	MathJax	KaTeX	XeTeX
`\ddddot{a}`	Positive · baseline	Pass	Pass	Pass
`\ddddot a`	Positive · bare[0]	Pass	Pass	Pass

`base`
Input	Case	MathJax	KaTeX	XeTeX
`\ddddot{a}`	Positive · baseline	Pass	Pass	Fail
`\ddddot a`	Positive · bare[0]	Pass	Pass	Fail