I am making a beamer file. While there's nothing in math mode, everything runs perfectly well, however, when sentences like
$P_A\subseteq E_X$
is inserted, it cannot output a .pdf file, but its ok with only $\subseteq$. I don't know what went wrong.
amsmathpackage? – Sigur Feb 13 '14 at 19:04beamerwhere the suggestion is to rather useusefonttheme[onlymath]{mathserif}. However, I don't know why you are having problems... – Werner Feb 13 '14 at 20:27