$\sup\limits_{x\to\infty}$
But before you start using this think about how it'll affect the line
spacing! Remember that most of the time the defaults are there for a good
reason.
--
Morten Høgholm
I haven't got a smelly address.
UK-TUG FAQ: <URL:http://www.tex.ac.uk/cgi-bin/texfaq2html>