[Xy-pic] Loop arrow in xymatrix?
Vadim Yu. Radionov
vadim at mccme.ru
Tue Apr 27 17:57:52 CEST 2004
Dear list members,
Can you help me to draw loop arrow in xymatrix?
I found \ar@(r,dr) in the manual, but i failed to specify directions
different from <diag>, and such arrow touches the horisontal or the
vertical one. I also tried curve extension, but failed to drop the tip at
the curve's end.
What is the answer?
Sincerely yours,
Vadim
PS. Here are my own ineffectual efforts:
\usepackage[matrix,arrow,curve,dvips]{xy}
\xymatrix@=1.5pc{ & k \ar[d] \\
A\otimes A \ar[r]^-\mu & A
\curve{"2,2"+(10,-3)&"2,2"+(3,-10)}
\ar@(r,dr)@<-2pt> \ar[d] \ar[r]^-\Delta & A\otimes A\rlap. \\
& k}
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