Last modified: 2010-06-21 22:10:09 UTC
For example <math> a \& b </math> Failed to parse (lexing error): a \& b " is also not recognized, but it is not clear that " could be useful in math formulas (while & certainly could).
Added \& in r68382, I've not added \": LaTeX Warning: Command \" invalid in math mode on input line 4. ! Please use \mathaccent for accents in math mode.