I am formatting some diagrams using arrows in xy-pic. The "standard" arrow head that xy-pic produces with the command \ar
is quite different (much smaller, thinner) than that produced by using the command \to
(outside of the xy-pic environment). I like the fatter arrowhead much better. How can I tell xy-pic that this is what I want??
The difference in output can be seen by compiling the following code:
\documentclass{article}
\usepackage{amsmath}
\usepackage[all]{xy}
\begin{document}
\[X\to Y\]
\[
\xymatrix{X\ar[r] & Y}
\]
\end{document}