Accents\underset

\undersetCommand

Places one math expression beneath a base expression, commonly for labels or annotations under operators, relations, or arrows.

\underset ab

Topic: Accents
Available in: base
Kind: prefix
Allowed mode: math
Frequency: 0.50% of corpus formulasrank 65 of 263
Commonality: medium

Renderer support

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

About the test scope

Syntax#

\undersetm{a}math contentm{b}math content

Argspec m m — two mandatory arguments. Reading argspecs

Common tasks#

How to put a label under a relation#

A \underset{\mathrm{open}}{\subset} B

How to write an arrow with a condition below#

x_n \underset{n\to\infty}{\longrightarrow} x

How to annotate an equality from below#

a \underset{(1)}{=} b

Examples#

\underset{x+y}{z}

In TeXForm#

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

Test cases#

`base`
Input	Case	MathJax	KaTeX	XeTeX
`\underset{a}{b}`	Positive · baseline	Pass	Pass	Fail
`\underset a{b}`	Positive · bare[0]	Pass	Pass	Fail
`\underset{a}b`	Positive · bare[1]	Pass	Pass	Fail

All 45 in Accents

Topic: Accents
Available in: base
Kind: prefix
Allowed mode: math
Frequency: 0.50% of corpus formulasrank 65 of 263
Commonality: medium

Renderer support

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

About the test scope

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