How to typeset a matrix with MathJax?

Question

I need to typeset a matrix with square brackets as delimiters for math.se (I believe they use MathJaX). How would I do that?

$\begin{bmatrix}a & b\\c & d\end{bmatrix}$ , just like LaTeX with amsmath — egreg, Feb 04 '12 at 23:44
You can also find a suitable example and see its source code by clicking edit. Here is an old example that I found at a quick glance to my answers while I was active in there and has many matrices in it. — percusse, Feb 05 '12 at 02:09
You can also right click on an equation, Show Math As → TeX commands. — kennytm, Feb 05 '12 at 07:57

score 54 · Answer 1 · answered Feb 05 '12 at 00:20

54

MathJax seems to accept the standard amsmath syntax

$\begin{bmatrix}a & b\\c & d\end{bmatrix}$

Rows are terminated with \\ and columns are separated by &

answered Feb 05 '12 at 00:20

egreg

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The Chapter 4.1 matrices of amsmath explains the options for matrices. There is also smallmatrix enviroment which allows to use the matrices inline with text $\begin{bmatrix}a & b\\c & d\end{bmatrix}$ – RubenLaguna Sep 22 '16 at 08:13
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For anyone looking, this is a working link of @RubenLaguna's comment: https://web.archive.org/web/20180619212427/ftp://ftp.ams.org/pub/tex/doc/amsmath/amsldoc.pdf – zfj3ub94rf576hc4eegm Dec 12 '20 at 02:34

Conor · Answer 2 · 2017-08-27T18:50:12.703

15

The curved brace matrix in Mathjax is:

$$\begin{pmatrix}a & b\\\ c & d\end{pmatrix}$$

Note: I used the wrapper \color{#C00}{ <code goes here> } to format it in this dark red color :)

edited Aug 27 '17 at 18:50

answered Aug 27 '17 at 18:08

Conor

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score 10 · Answer 3 · answered Feb 05 '12 at 05:04

MathJax comes with a configuration file that includes all the most general of the pre-defined configurations. It loads all the important MathJax components, including the TeX and MathML preprocessors and input processors, the AMSmath, AMSsymbols etc. So what you do you write in a similar fashion to a normal TeX file.

  $\begin{matrix} a & b \\ c & d \end{matrix}$

Whenever you get stuck do a search on wikipedia and view the equation in the editor tab. Most of the wiki mark-up will work straight with MathJax.

How to typeset a matrix with MathJax?

3 Answers3

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