Artemio González López <artem...@mac.com> writes:
> I’ve been having some problems with auctex formatting of some
> equations. Here’s a minimal example:
>
> \documentclass[a4paper,11pt]{article}
>
> \usepackage{babel}
> \usepackage{amsmath}
>
> \begin{document}
>
> \[
> I_O=Ml^2\begin{pmatrix}
> \frac1{12}& 0& 0\\[2pt]
> 0& \frac1{12}& 0\\[2pt]
> 0& 0& \frac16
> \end{pmatrix}+Ml^2
> \begin{pmatrix}
> \hfill\frac14& -\frac14& 0\\[2pt]
> -\frac14& \hfill\frac14& 0\\[2pt]
> \hfill 0& \hfill 0& \frac12
> \end{pmatrix}=Ml^2
> \begin{pmatrix}
> \hfill\frac13& -\frac14& 0\\[2pt]
> -\frac14& \hfill\frac13& 0\\[2pt]
> \hfill0& \hfill0& \frac23
> \end{pmatrix}
> \]
>
> \end{document}
>
> After the equation all text is aligned with the closing \[, which is a
> pain. Is this reproducible? And, more importantly, how could I fix it?
Yes, I can reproduce this. I think your best bet is to have \begin|\end
statements in their own line and format your input like this:
\[
I_O=Ml^2
\begin{pmatrix}
\frac1{12} & 0 & 0 \\[2pt]
0 & \frac1{12} & 0 \\[2pt]
0 & 0 & \frac16
\end{pmatrix}
+Ml^2
\begin{pmatrix}
\hfill\frac14 & -\frac14 & 0 \\[2pt]
-\frac14 & \hfill\frac14 & 0 \\[2pt]
\hfill 0 & \hfill 0 & \frac12
\end{pmatrix}
=Ml^2
\begin{pmatrix}
\hfill\frac13 & -\frac14 & 0 \\[2pt]
-\frac14 & \hfill\frac13 & 0 \\[2pt]
\hfill0 & \hfill0 & \frac23
\end{pmatrix}
\]
The alignment of '&' is of course unnecessary and was simply done by
`align-regexp'.
Best, Arash
