Help:FAQ/Technical questions/Problem with Eqn template

Problem with Eqn template
"I've added a proof sequence using the eqn template, and despite my best efforts the parser barfs on it. It makes a horrendous mess that I can't work out how to clear up."


 * What's probably happened is that you have included instances of  or   or   in your $\LaTeX$.


 * The MediaWiki template parser takes precedence over the MathJax one, and views  and   as the beginning and end of the invocation of eqn, thus breaking the $\LaTeX$ in two. Similarly, it interprets   as the MediaWiki instruction to interpret what follows as a parameter value.


 * In order to get round this, you need to:
 * Put a conventional space between all instances of  and   to make them   and
 * Replace all instances of:
 * with
 * and  with , which renders as $\Vert$.
 * --prime mover (talk) 08:58, 8 March 2013 (UTC)