Wikipedia refuse wikimedia file generated from docx with <math> expression containing \text{\ }

[Bernard Schleich <bernard.schleich-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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I'm trying to convert a big mathematical article (32 pages) with a lot of 
mathematical expressions from *docx* to *wikimedia.*

When, from Wikipedia Sandbox, I incorporate wikimedia file generated by 
pandoc, the following line are refused by Wikipedia

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{| class="wikitable"
|-
! 1)
! <math display="block">S_{m} = \int_{0}^{a}{\varepsilon^{m}\text{\ 
}\psi(\varepsilon)}\text{\ }\text{d}\varepsilon</math>
|}

after replacing \text{\ } by \  or ~, the formula is accepted !

This error occurs also when text is containing space as in following exemple

{| class="wikitable"
|-
! 9)
! <math display="block">\varphi(\sigma_{1})_{2}\delta_{1} = \{\begin{matrix}
\frac{4\sigma_{1}}{a^{2}}\delta_{1} & \text{für\ }2\sigma_{1} < a \\
\frac{4(a - \sigma_{1})}{a^{2}}\delta_{1} & \text{für\ }2\sigma_{1} > a \\
\end{matrix}</math>
|}

After having replacing \text{für\ } by \text{für}~, the formula is accepted 
!

I know that error is detected in Wikipedia, but I ask my question to Pandoc 
because Wikipedia is first to use wikimedia ! 

*Is that a bug ?*

Is there a parameter that I can use and that avoid to write \  in \text{...} Latex 
expression ?

Thanks for any help !

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