[tex4ht] tex4ht gives amsmath Error: \tag not allowed here

[Ulrike Fischer]

Am Fri, 7 Sep 2018 10:29:48 +0200 schrieb Michal Hoftich:

> Hi Nasser,
> 
>> Ok, using equation instead of \[ \] does not produce error with tex4ht
> 
> Isn't \tag supposed to be used only with amsmath environments? I think
> you really shouldn't use it with \[ \]

No. Tracing the code

\documentclass{article}
\usepackage{amsmath}

\begin{document}
\tracingmacros=1
\[abc \tag{x}\]

\end{document}

you can see 

\[  ->\begin {equation*}

and 

\mathdisplay #1->\ifmmode \@badmath \else $$\def \@currenvir
{#1}\let \dspbrk at context \z@ \let \tag \tag at in@display  


So it is quite obvious that is should work in \[ \].


-- 
Ulrike Fischer 
https://www.troubleshooting-tex.de/