I do not have very much experience with the xy-pic package and I always try to figure out things by copying and pasting codes. I am stuck in here: I would like to get an arrow from A to C with an ...
I am using an iPad app TeX Writer and would like to draw a commutative diagram. I can use amscd in the app but it is not sufficient for the diagrams I want to draw. To include new package, I need to ...