In the helpfile Math.lyx it is stated:
To export this document to PDF, PS or DVI the LaTeX-packages braket,
cancel, eurosym, mathdots, mathtools, mhchem, undertilde and was should
be installed. If they are not installed the document can be exported
anyway but the sections where the packages are required will not appear
in the output. An exception is mhchem; if it is not installed, this file
cannot be exported.
The latest PDF-version of this document can be found
here:https://wiki.lyx.org/LyX/Manuals#Math
However, I could not find \usepackage{mhchem} in this helpfile Math.lyx
Is this intentional? Or included in another \usepackage?
Wolfgang
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