[tex4ht] Issues with unpaired brackets
Michal Hoftich
michal.h21 at gmail.com
Wed Apr 12 22:16:37 CEST 2017
Hi all,
incidentally, I found one issue in documents compiled to MathML, from
two independent sources. Meaningless MWE:
\documentclass{article}
\begin{document}
[this is for test $a+b=c]$
\end{document}
What is important is `]` at the end of inline math. It produces the
following result with `mathml` option:
<!--l. 3--><p class="noindent" >[this is for test <!--l. 3--><math
xmlns="http://www.w3.org/1998/Math/MathML"
display="inline" ><mi
>a</mi> <mo
class="MathClass-bin">+</mo> <mi
>b</mi> <mo
class="MathClass-rel">=</mo> <mi
>c</mi></mrow><mo
class="MathClass-close">]</mo></mrow></math>
</p>
The issue is that there are two clossing `</mrow>` tags, but none is
opened. I've found that it can be fixed using `mathml-` option:
<!--l. 3--><p class="noindent" >[this is for test <!--l. 3--><math
xmlns="http://www.w3.org/1998/Math/MathML"
display="inline" ><mi
>a</mi> <mo
class="MathClass-bin">+</mo> <mi
>b</mi> <mo
class="MathClass-rel">=</mo> <mi
>c</mi><mo
class="MathClass-close">]</mo></math>
</p>
It seems that one must use paired brackets (they don't have to be the
same kind $(a+b=c]$ works as well) with default tex4ht configuration.
Every opening bracket add two opening `<mrow>` tags and closing bracket
closes that.
As I am not math expert, my question is:
Is the original example actually correct? Shouldn't be all brackets
paired, or is the default tex4ht configuration wrong in assuming this? I
know that one must use \left. if there is no opening bracket for
\right). Is there similar mechanism for normal brackets?
Could anybody test if `mathml-` option gives correct results for more
complicated real world examples?
Best regards,
Michal
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