2

I try to compile the following very simple code by tex4eboot:

\documentclass{amsart}

\begin{document}
\[
  x=y\label{t1}\tag{Test}
\]
Look at equation \ref{t1}.
\end{document}

It gives me errors:

[ERROR]   htlatex: Compilation errors in the htlatex run
[ERROR]   htlatex: Filename Line    Message
[ERROR]   htlatex: ./test.tex   5    Package amsmath Error: \tag not allowed here.
[ERROR]   htlatex: Compilation errors in the htlatex run
[ERROR]   htlatex: Filename Line    Message
[ERROR]   htlatex: ./test.tex   5    Package amsmath Error: \tag not allowed here.
[ERROR]   htlatex: Compilation errors in the htlatex run
[ERROR]   htlatex: Filename Line    Message
[ERROR]   htlatex: ./test.tex   5    Package amsmath Error: \tag not allowed here.

However, I can use pdflatex to compile it. I know that I can replace \[ and \] by equation. However, since usually the article is long and a regexpr to replace will lead to unexpected results. I wonder a workaround for this. Thanks!

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1
  • 1
    if you get an error please always show the exact error from the log, I get no error with pdflatex (as you say)
    – David Carlisle
    Dec 13, 2019 at 23:31

2 Answers 2

Reset to default
1

Try the following configuration file:

\Preamble{xhtml}
\Configure{[]}{\begin{equation*}}{\end{equation*}}{}
\begin{document}
\EndPreamble

It basically does the same thing as Amsmath, configures \[ ... \] to the equation* environment.

This is the result:

enter image description here

I've added this code to tex4ht sources, so it should be default behavior in the future.

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2
  • Thanks. I found that in my configure file, it has a previous configuration like RobustCommand to treat \[ as \begin{equation*}. Unfortunately, I deleted it so I cannot recover it now. What's the different between the two?
    – Yai0Phah
    Dec 16, 2019 at 9:00
  • @Yai0Phah the \RobustCommand version could broke some things, it don't work for MathML for example. This version should be safer.
    – michal.h21
    Dec 16, 2019 at 9:22
0

Generally \[...\] used for unnumbered display equation, if you change your code to \begin{equation}...\end{equation}, then your code works fine, and the modified MWE is:

\documentclass{amsart}

\begin{document}
\begin{equation}
  x=y\label{t1}\tag{Test}
\end{equation}
Look at equation \ref{t1}.
\end{document}

and the converted HTML output is:

enter image description here

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2
  • It is very weird that equation* works but \[ and \] don't work (I found it just after upgrade to the current version of tex4ht, previously equation* did not work). I know that equation always works, but since \[ and \] work for pdflatex, I hope that it would be supported in tex4ht.
    – Yai0Phah
    Dec 14, 2019 at 17:19
  • michal.h21 already answered that he added this code to tex4ht sources...
    – MadyYuvi
    Dec 16, 2019 at 5:00

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