Hi I wrote \Rightarrow in mathmode and it looked good in Lyx, but when I previewed the postscript file I got : instead of =>
the problem disapeared when I removed \usepackage{marvosym} from the preamble.
What's wrong, and how can I both use marvosym and write \Rightarrow and get
what I want in math mode ( => )
Gunnar.
