\usepackage[utf8]{inputenc}
% Grab the AMS fonts, too, for things like \mathbb.
-\usepackage{amsfonts}
+\ifx\mathbb\undefined
+ \usepackage{amsfonts}
+\fi
+% Add the \mathpzc (PostScript Zapf Chancery) font face, scaled up by
+% a factor of 1.15. This is described in the documentation for the
+% urwchancal package which further adapts this technique. So long
+% as we don't ask too much of it, however, the few lines below suffice.
+\DeclareFontFamily{OT1}{pzc}{}
+\DeclareFontShape{OT1}{pzc}{m}{it}{<-> s * [1.15] pzcmi7t}{}
+\DeclareMathAlphabet{\mathpzc}{OT1}{pzc}{m}{it}
\fi