how to redefine \begin{align*} … \end{align*} to \begin{eqnarray*} … \end{eqnarray*}

Question

Scientific word insists in generating displayed math using

\begin{align*} ... \end{align*}

and htlatex has a bug in that it does not generate bit mapped images in this case.

The fix that I found after trial and error is to replace the above with

  \begin{eqnarray*} ....  \end{eqnarray*}

So I just need to know what the syntax is supposed to be. The bug that describes this more is here http://puszcza.gnu.org.ua/bugs/?179

Answer 1

Thanks to CV Radhakrishnan from tex4ht, the bug has been fixed.

There is an option now to handle the problem with images for math in the align environment. The option is pic-align

  htlatex  foo.tex  "html,pic-align"

Here is the result now using this option

\documentclass[12pt,titlepage]{article}%
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{amsmath}%

\begin{document}

\begin{eqnarray*}
  v^{2} & =& \left(  \dot{x}+v_{x}\right)  ^{2}+v_{y}^{2}\\
        & =& \dot{x}^{2}+l^{2}\dot{\theta}^{2}+2\dot{x}l\dot{\theta}\cos\theta
\end{eqnarray*}

\begin{align*}
  v^{2} & =\left(  \dot{x}+v_{x}\right)  ^{2}+v_{y}^{2}\\
        & =\dot{x}^{2}+l^{2}\dot{\theta}^{2}+2\dot{x}l\dot{\theta}\cos\theta
\end{align*}

\end{document}

Here is the output from htlatex foo.tex "html,pic-align"

We can see that align now works fine in htlatex !

Just for completion, if someone is using htlatex, you'd need to also add these 2 lines to your config file to force some of the inlined math to be bit mapped. An example myconfig.cfg

\Preamble{html}
\begin{document}
  \Configure{$}{\PicMath}{\EndPicMath}{}
  \Configure{PicMath}{}{}{}{ class="math" align="absmiddle"} 
\EndPreamble

and now the command is:

htlatex foo.tex "myconfig.cfg,html,pic-align"