I am using xypic package and I wrote the following xymatrix
\[
\xymatrix{
x \ar@(ur,dr)[]|{a} \\
| \\
y \ar@(ur,dr)[]|{b}\\
| \\
z \ar@(ur,dr)[]|{c}
}
\]
but the spacing on the output pdf file is pretty bad (there is too much gap/spacing between the rows). I spent some time modifying as in 3.3 Spacing and rotation [page 9] from this link http://www-bcf.usc.edu/~cautis/tools/xypic.pdf but that link is not helping.
Is there a way to make the gap between the rows smaller?