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User:Pfafrich/Blahtex en.wikipedia fixup

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This page and its sub pages document incompatibilities between the latex used in the English wikipedia and the latex standard (as far as such a thing exists). It is part of the meta:Blahtex project that aims to produce MathML output from wikipedia.

You can help

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The specific incompatibilities and the pages where they are found can be found at

There are still some other incompatibilities which I've yet to search for. See http://blahtex.org/errors-20060220.html for a complete list.

Code

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This info has been extracted from the XML Database dumps, (enwiki-20060125-pages-meta-current.xml.bz2)

A simple perl script and a bit of grep and sed have been used to extract the data. 

bunzip2 -c enwiki-20060125-pages-meta-current.xml.bz2 
  | sed 's/&lt;math&gt;/\n<math>\n/g' 
  | sed 's/&lt;\/math&gt;/\n<\/math>\n/g' 
  | perl math.pl > eqnsJan06.txt

This finds all the equations inside <math> tags and lists them by page.

Greping of patterns. The problematic patterns can be found using grep

  • grep '[^\\]\$' eqnsJan06.txt - finds occurences of $
  • grep '[^\\]\%' eqnsJan06.txt - finds occurences of %
  • grep '\underline\s*\\' eqnsJan06.txt/nowiki></tt> - find occurences of \underline\mathrm etc. - clear * <tt><nowiki> - find occurences of
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