*If you need to write vertically aligned stuff in braces, using the "<nowiki>\begin{cases}</nowiki>" mechanism, do not use <nowiki>\textrm</nowiki> inside the cases. It's legal LaTeX, but it doesn't work in Wikimedia. Use <nowiki>\mbox</nowiki> instead. See [[Fundamental group]] for examples. [[User:PatrickD|PatrickD]] 14:13, 5 July 2009 (EDT) | *If you need to write vertically aligned stuff in braces, using the "<nowiki>\begin{cases}</nowiki>" mechanism, do not use <nowiki>\textrm</nowiki> inside the cases. It's legal LaTeX, but it doesn't work in Wikimedia. Use <nowiki>\mbox</nowiki> instead. See [[Fundamental group]] for examples. [[User:PatrickD|PatrickD]] 14:13, 5 July 2009 (EDT) |