Hey, this is my first post here.

I'm using Lyx 1.6 and I want to draw a commutative diagram (abstract
algebra).

The question is: I'm not sure if I even have xypic; how to figure out if I
do or not; and, if I don't, where I can download it and which files go where
(I'm not a computer person, I have no idea how to set that up right).

I'm looking at the help for this in Lyx itself. I'm following the
instrucions, and when it's time to test the xypic out, it says to try the
code

\xymatrix{A\ar[r]&B}

Which should give something like

A-->B

But what happens is, whenever I hit the { after typing \xymatrix, the
\xymatrix disappears (is just replaced by a little box to type into). Help?



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