Support \mathds, \hdots, \DeclareMathOperator, \hspace

[giuseppec]

I am using the command pandoc -s test.tex -o test.docx to convert a TeX file called test.tex with the following content to Word:

\documentclass{article}
\usepackage{amsmath, dsfont}
\DeclareMathOperator*{\argmin}{arg\,min}
\begin{document}
$$\mathds{R}$$
$$1, \hdots, n$$
$$\argmin_{x}$$
$$a \hspace{10pt} b$$
\end{document}

However, each equation is not converted and I am getting a warning

[WARNING] Could not convert TeX math '\mathds{R}', rendering as TeX:
  \mathds{R}
         ^
  unexpected "{"
  expecting "%", "\\label", "\\nonumber" or whitespace
[WARNING] Could not convert TeX math '1, \hdots, n', rendering as TeX:
  1, \hdots, n
           ^
  unexpected ","
  expecting "%", "\\label", "\\nonumber" or whitespace
[WARNING] Could not convert TeX math '\argmin_{x}', rendering as TeX:
  \argmin_{x}
         ^
  unexpected "_"
  expecting "%", "\\label", "\\nonumber" or whitespace
[WARNING] Could not convert TeX math 'a \hspace{10pt} b', rendering as TeX:
  a \hspace{10pt} b
           ^
  unexpected "{"
  expecting "%", "\\label", "\\nonumber" or whitespace

Is there any solution to get this converted?
PS: I was not sure if I should post this issue to https://github.com/jgm/texmath ?

[jgm]

Are these standard LaTeX commands or defined in some package? If so, which?

[jgm]

• \mathds is from mathds package, for double-stroke fonts. Try adding \let\mathds\mathbb to your document and pandoc should handle this fine. I'm not sure whether it makes sense to add support for this to texmath: probably.

• \hdots seems to be the same as \ldots; at least I can't tell the output apart. Try adding \let\hdots\ldots. We should support this in texmath.

• \argmin - I couldn't find any prepackaged version of this. See https://tex.stackexchange.com/questions/5223/command-for-argmin-or-argmax for some ways to define it. If you include one of these \newcommand definitions, it should work in pandoc.

• \hspace - there's no good way to represent vertical spacing in our equation model, but we could skip this I suppose.

[giuseppec]

thanks for clarification. Some comments:

• mathds support would be great, since it adds suport for double-stroke numerals and looks better. For example, \mathbb{1} does not work but \mathds{1} works, see https://tex.stackexchange.com/a/227808/26830
• Yeah I personally replaced \hdots with \ldots or \dots to get rid of the warnings.
• \argmin in the minimal example from my first post I used \DeclareMathOperator*{\argmin}{arg\,min} to define the \argmin command, which is also the correct way to do this (see https://tex.stackexchange.com/a/5255/26830). I know that one could also just use a \newcommand definition but the question is: wouldn't it make sense to add support for \DeclareMathOperator* definitions in pandoc? Maybe this is not high prio but would make sense if you don't want to force people to translate their (dozends) \DeclareMathOperator definitions to \newcommand definitions.
• skipping \hspace should be fine. Or replacing (or handling) it with some other spacing commands such as \quad or \; before converting it.

[jgm]

Right. We should support \DeclareMathOperator in pandoc's latex reader.
And actually \hspace should be no problem to support (I was thinking of \vspace).