# brucemiller/LaTeXML

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# [braket] Some commands not working in \Braket{} with SVG output #786

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opened this Issue Jul 9, 2016 · 1 comment

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### matteosecli commented Jul 9, 2016

 Hi, I've just encountered a problem with the braket package. My MWE is \documentclass{article} \usepackage{amsmath} \usepackage{braket} \begin{document} $$\Braket{a_{\mathbf{p}}^{\dagger}a_{\mathbf{p}}}.$$ \end{document}  As in issue 785, things work with latexmlc --verbose --destination=MWE.html MWE.tex but do not with latexmlc --verbose --mathsvg --destination=MWE.html MWE.tex. The error is always the same: Error:shell:latex LaTeX command 'latex ltxmlimg > ltxmlimg.ltxoutput' failed returned code 256 (!= 0): See /tmp/LaTeXMLVPd3er/ltxmlimg.log In Post::MathImages[@0x3d8a6d8] ->generateImages Couldn't find image for 'LaTeXML::Post::MathImages:svg:\beginDISPLAY \lx@Braket@{a_{\mathbf{p}}^{\dagger}a_{\mathbf{p}}}.\endDISPLAY'  and the log says ! Undefined control sequence. l.61 \beginDISPLAY \lx @Braket@{a_{\mathbf{p}}^{\dagger}a_{\mathbf{p}}}.\endD... The control sequence at the end of the top line of your error message was never \def'ed. If you have misspelled it (e.g., \hobx'), type I' and the correct spelling (e.g., I\hbox'). Otherwise just continue, and I'll forget about whatever was undefined.  In the example I've used \Braket{a_{\mathbf{p}}^{\dagger}a_{\mathbf{p}}} just because it stems from a typical (physical) formula, but the same problem occurs with a simpler \Braket{\mathbf{A}} or \Braket{\vec{A}} (I firstly realized the problem with \mathbf since sometimes I redefine \vec as \mathbf). The same goes with \mathcal{A} and I guess a larger variety of commands like these. Strangely enough, things work with \Bra{} or \Ket{} alone. For example, if change my MWE into \documentclass{article} \usepackage{amsmath} \usepackage{braket} \begin{document} $$\Bra{a_{\mathbf{p}}^{\dagger}}\Ket{a_{\mathbf{p}}}.$$ \end{document}  things work as expected both with and without --mathsvg.

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### brucemiller commented Dec 4, 2016

 Sorry for the delay; easy fix, as well. The internal constructors needed an alias so that they revert to the original commands that were used, such as \braket`. Thanks for the report!

### brucemiller closed this Dec 4, 2016

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