Matrix equation does not get displayed

[chandra]

I am using pandoc to generate HTML , including LaTeX formulae, that are rendered into mathematical formulae by MathJax. Things were working correctly until recently when I discovered that a matrix equation did not get rendered by MathJax.

My source markdown text contains this:

 If all this seems too abstract, here is a concrete example of a $2 \times 3$ matrix:
$$
A = \left[
1 & 3 & 5\\
2 & 4 & 6\\
\right]
$$
where we have $a_{12} = 3$ and $a_{21} = 2.$

This is rendered by pandoc into HTML as

If all this seems too abstract, here is a concrete example of a <span class="math">\(2 \times 3\)</span> matrix: <span class="math">\[
A = \left[
1 &amp; 3 &amp; 5\\
2 &amp; 4 &amp; 6\\
\right]
\]</span> where we have <span class="math">\(a_{12} = 3\)</span> and <span class="math">\(a_{21} = 2.\)</span></p>

 MathJax used to render this correctly but now I see the image shown above. [Sorry I cannot figure out how to re-position it :-( ]

    

Can anyone tell me what I am doing wrong?

In case you want to see the rest of the correctly rendered MathJax stuff as part of a blog, please see:

http://swanlotus.org/varieties-of-multiplication/

Thank you.

[Davide P. Cervone]

You are missing the \begin{matrix}...\end{matrix} around the matrix itself.  The ampersands (&) must be within a table of some sort, and you don't currently have one.  Try

$$

A = \left[

\begin{matrix}

1 & 3 & 5\\
2 & 4 & 6\\

\end{matrix}
\right]
$$

Davide

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[R (Chandra) Chandrasekhar]

Thank you, Davide. That fixed it. :-)

Can I use

\begin{bmatrix} ... \end{bmatrix}

instead of

\left[\begin{matrix} ...\end{matrix}\right]?

That is, does the latest MathJax also work with the AMS extensions?

Thanks.

Chandra

>> <https://lh6.googleusercontent.com/-E8MuWRvAt08/UVrJrCqj8KI/AAAAAAAAAAk/liKR5GqtTbU/s1600/matrix-not-rendered.png>

[Peter Krautzberger]

Yes, bmatrix is supported, see http://docs.mathjax.org/en/latest/tex.html#environments

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[Davide P. Cervone]

Yes you can use bmatrix or the other AMS versions of matrix. You can see the complete list of supported macros and environments at

http://docs.mathjax.org/en/latest/tex.html#supported-latex-commands

Davide

[Davide P. Cervone]

OOPS, I see Peter already answered! Sorry for the repeat.

Davide