I guess your file is corrupted, because I have checked an the ZIM file is OK. I will published a new ZIM file of WPRU in the next days, maybe an occasion to redownload it (with Bittorrent).
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Kiwix should show the equations. What is exactly the problem? file? article name?
Уравнения Максвелла (russian wiki).
I see the formulae like "\nabla\cdot\mathbf{D}=4\pi \rho"
Which version of Kiwix? which version of the file? Which article?
My guess is that you simple use kiwix 0.9rc2, you should download the last version.
I use Kiwix-0.9-win
Wikipedia: created 2015-03-23, size 3.09Gb (1 204 208 articles, 49 medias), publisher kiwix
I guess your file is corrupted, because I have checked an the ZIM file is OK. I will published a new ZIM file of WPRU in the next days, maybe an occasion to redownload it (with Bittorrent).
I have tried with last version of Kiwix and WPRU ZIM file and it works for me. Sorry but I have to close this ticket.