On Thu, Mar 08, 2012 at 09:29:08AM -0500, Juan Deaton wrote: > Anyone figure this problem out? And what's the problem? \documentclass{article} \usepackage{dsfont} \begin{document} \begin{equation}\mathds{C} = A\end{equation} \end{document} Works fine both with pdflatex and xelatex. Yours sincerely Heiko Oberdiek