"\AA" in math mode breaks math-to-image-conversion with "latexmlpost --mathimages"

[siegfriedzoetzsche]

If I convert the file aa.tex:

    \documentclass{article}
    \usepackage{amsmath}
    \begin{document}
    $3\,\text{\AA}$
    \end{document}

with

    latexml --destination aa.xml aa.tex
    latexmlpost --verbose --pmml --mathtex --mathimages --destination=aa-post.xml aa.xml 

I get

    [...]
    Error:shell:latex LaTeX command 'latex ltxmlimg > ltxmlimg.ltxoutput' failed
    [...]

/tmp/LaTeXML<...>/ltxmlimg.log:

    ! Undefined control sequence.
    <argument> \lx 
                   @utf@AA
    l.60 \beginINLINE 3\,\text{\lx@utf@AA}
                                          \endINLINE\clearpage

/tmp/LaTeXML<...>/ltxmlimg.tex:

    \begin{document}
    \beginINLINE 3\,\text{\lx@utf@AA}\endINLINE\clearpage
    \end{document}

I can work around the problem by using the Definition of \AA from TeX.pool.ltxml:

    DefPrimitiveI('\AA', undef, UTF(0xC5));     # LATIN CAPITAL LETTER A WITH RING ABOVE

instead of that in LaTeX.pool.ltxml:

    DefMacroI('\AA', undef, '\lx@utf@AA');

and changing aa.tex to aafix.tex:

    \documentclass{article}
    \usepackage{amsmath}
    \usepackage{aafix}
    \begin{document}
    $3\,\text{\AA}$
    \end{document}

with aafix.sty.ltxml:

    # -*- CPERL -*-
    package LaTeXML::Package::Pool;
    use strict;
    use warnings;
    use LaTeXML::Package;
    
    DefPrimitiveI('\AA', undef, UTF(0xC5));
    
    1;

and running:

latexml --destination aafix.xml aafix.tex
latexmlpost --verbose --pmml --mathtex --mathimages --destination=aafix-post.xml aafix.xml 

I guess the problem occurs for all of these defined in LaTeX.pool.ltxml:

    DefMacroI('\OE', undef, '\lx@utf@OE');
    DefMacroI('\oe', undef, '\lx@utf@oe');
    DefMacroI('\AE', undef, '\lx@utf@AE');
    DefMacroI('\ae', undef, '\lx@utf@ae');
    DefMacroI('\ae', undef, '\lx@utf@ae');
    DefMacroI('\AA', undef, '\lx@utf@AA');
    DefMacroI('\aa', undef, '\lx@utf@aa');
    DefMacroI('\O',  undef, '\lx@utf@O');
    DefMacroI('\o',  undef, '\lx@utf@o');
    DefMacroI('\L',  undef, '\lx@utf@L');
    DefMacroI('\l',  undef, '\lx@utf@l');
    DefMacroI('\ss', undef, '\lx@utf@ss');
    DefMacroI('\dh', undef, '\lx@utf@dh');    # in latex?
    DefMacroI('\DH', undef, '\lx@utf@DH');
    DefMacroI('\dj', undef, '\lx@utf@dj');
    DefMacroI('\DJ', undef, '\lx@utf@DJ');
    DefMacroI('\ng', undef, '\lx@utf@ng');
    DefMacroI('\NG', undef, '\lx@utf@NG');
    DefMacroI('\th', undef, '\lx@utf@th');
    DefMacroI('\TH', undef, '\lx@utf@TH');

[dginev]

Thank you for the report! I have quickly edited the code blocks for extra readability, without changing any content.

[brucemiller]

Jeez, silly me. I added a level of redirect (since some etoolbox stuff(?) seemed to expect these to be macros), but neglected to add aliases so that revert back to the normal `\AA'. Sorry! Fixed now. Thanks for the report!