iBooks Author Latex Question Any idea how would you go about drawing a 3x3 matrix in iBooks Author?

My Latex formula which works on other platforms is

$$\left[\begin{array}{ c c c }1 &amp; 1 &amp; 1 \2 &amp; -1 &amp; 1 \ 1 &amp; 2 &amp; -1\end{array} \right]$$

iBooks simply says "invalid equation".

Cheers

Nick
iBooks Author only supports a subset of LaTeX, see iBooks Author: About LaTeX and MathML support for a full list of supported commands.

From looking at the samples in the support document, something like 

\begin{matrix}
1 &amp;  1 &amp;  1 \\
2 &amp; -1 &amp;  1 \\
1 &amp;  2 &amp; -1 \\
\end{matrix}


should work.