When writing diagrams with XY-Pic, fractions appear as if they were math enclosed in $$
.
Example:
\documentclass{minimal} \usepackage{xy} \begin{document} \begin{xy} (0,0)*{\frac{d_1}{d_2}}; \end{xy} \end{document}
The actual diagram I am working at is of course more complicated, and these fractions appear too cramped.
How can I enforce the fraction to appear as in displayed math, that is, as in \[ \frac{d_1}{d_2} \]
?