Hannan Sadar wrote:
I added a lyx file which would explain my problem better then how i could explain it.
do not use \vline here, use \Big| or of the other \big \bigg \Bigg, see 3rd link below
Herbert
-- http://TeXnik.de/ http://PSTricks.de/ ftp://ftp.dante.de/tex-archive/info/math/voss/Voss-Mathmode.pdf http://www.dante.de/faq/de-tex-faq/ http://www.tex.ac.uk/cgi-bin/texfaq2html?introduction=yes