On Fri, Mar 12, 2010 at 11:28 +0100, Sergio Llorente wrote: > $$ > \begin{aligned} > [z]=[y] > \end{aligned} > $$ > $[z]$ is missing!
The aligned environment accepts an optional argument. Here it thinks your [z] is the argument. One solution would be to use \begin{equation*} \begin{aligned}\relax [z]=[y] \end{aligned} \end{equation*} (Concerning $$...$$ please see 'texdoc l2tabuen') cheerio ralf -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org