Possible Duplicates:
Is there a standard/best practice for typesetting "nth" in LaTeX? Right now I've got $n$th, but that looks a bit weird, with the math-mode n right next to the standard-text th. I've also considered $n^\text{th}$ (which really seems like too much work). I'm sure there's some ridiculously simple solution--I just haven't found it yet. Can you please clue me in?
\newcommand{\nth}{$n^\text{th}$}? – Mar 21 '11 at 18:05