On Wed, 1 Jan 2025 at 20:18, Jean-Marc Lasgouttes <lasgout...@lyx.org>
wrote:
> Le 26/12/2024 à 13:54, yigiter yuksel a écrit :
> > Hello Lyx-Developers,
> >
> > I noticed that the mathml conversion for bracketed matrices with under/
> > overbraces generates excessive mathml tags which generally causes
> > mathjax to generate an error. I attached a sample lyx file to depict the
> > situation. (the preamble has the mathjax cdn built in). My lyx version
> > is 2.4.1, but I could not see a related changelog in the newer versions.
> > That is why I decided to report it.
>
> Hello,
>
> Could you be more precise about the extra tags? What is the code you
> would expect to obtain?
>
> The best would be to open a ticket on www.lyx.org/trac/. I can create an
> account for you there. We do not want such reports to be lost.
>
I have studied the current output of LyX 2.5 (which includes many changes
from 2.4 regarding extraneous tags, thanks Roberto/lynx!). MathType
generates the same thing for all your formulae:
\underbrace{2}_{3}
<m:math display='block'>
<m:semantics>
<m:munder>
<m:munder>
<m:mn>2</m:mn>
<m:mo stretchy='true'>︸</m:mo>
</m:munder>
<m:mn>3</m:mn>
</m:munder>
</m:annotation>
</m:semantics>
</m:math>
\underbrace{\begin{bmatrix}2\end{bmatrix}}_{3}
<m:math display='block'>
<m:semantics>
<m:munder>
<m:munder>
<m:mrow>
<m:mfenced close="]" open="[">
<m:mrow>
<m:mtable equalrows='true' equalcolumns='true'>
<m:mtr>
<m:mtd>
<m:mn>2</m:mn>
</m:mtd>
</m:mtr>
</m:mtable></m:mrow>
</m:mfenced></m:mrow>
<m:mo stretchy='true'>︸</m:mo>
</m:munder>
<m:mn>3</m:mn>
</m:munder>
</m:semantics>
</m:math>
2=\begin{bmatrix}3 & 4\end{bmatrix}^{t}
I think that this problem went away in master (again, thanks to Roberto).
Still, MathML underwent quite a bit of refactoring and I don't think it
would be safe to backport to 2.4 (especially parts like 9e6b810b).
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