Using braces to label parts of an equation

Question

Given an equation, say Bayes' rule,

$P(X \mid O) \propto P(X)P(O \mid X)$

how do I label the different parts of the equation using curly braces?

Ah braces, that what they're called. A Google search to "latex moustache" didn't lead me to \overbrace — Paul, Nov 03 '14 at 21:30

score 63 · Accepted Answer · edited Nov 24 '14 at 12:12

63

I think you're after the \underbrace and \overbrace commands, which you could use as

$\underbrace{P(X \mid O)}_{p_1} \propto \overbrace{P(X)P(O \mid X)}^{p_2}$.

Which results in:

Under- and overbraces

edited Nov 24 '14 at 12:12

LondonRob

answered Aug 12 '10 at 05:49

Michael Underwood

I wonder why does adding underbrace/overbrace affect the font size? – Cyriac Antony Dec 12 '20 at 10:02
Is it possible to move the under-/overbrace farther down/up? – Felix Jassler Mar 21 '22 at 08:30

1 Answers1