Pol wrote:
While the single arrow in command \xymatrix{A \ar[r] B} is displayed by lyx, three arrow graph in command \xymatrix{ & & p,a & \\ p \ar[r] \ar[ur] \ar[dr] & & p,n & \\ & & p,e & } is undisplayed (yet correctly printed out)Any ideas? Any matrix or array specifications needed in the preamble? thank you ---P
FWIW, I pasted your three arrow code into a new document in LyX (with \usepackage[all]{xy} in the preamble), and instant preview displayed it with three arrow heads but only one arrow (the middle one). I also threw in another math inset with an integral, and instant preview did not display the integral sign.
Then I saved and closed the document and reopened it (without leaving LyX) and IP got everything right. I've had other adventures like this with IP -- not sure what goes on.
This is LyX 1.6.1 + MiKTeX 2.7 + Windows XP. /Paul
