I would like to draw an octahedral diagram in my paper; I would prefer to present it as the 'upper hat' + the 'lower hat' (as it is common in the texts on triangulated categories). Could anyone tell me where I can find this diagram (certainly, the 'upper hat part' is sufficient) written down in latex. Maybe, someone could just share with me his own latex realization of this diagram (so that I could replace the original names of objects and morphisms by the ones I need)?



The (upper hat of) an octahedral diagram in (la)tex
Mikhail,


Here's an upper cap in xy-pic


\xymatrix{
 X'\ar[rd]^{[1]}\ar[dd]^{[1]} & & Z\ar[ll] \\ 
 & Y\ar[ru]\ar[ld] & \\ 
 Z'\ar[rr]^{[1]} & & X\ar[lu]\ar[uu]
}


at least it's enough of one to get you started. Note that I didn't construct it by hand.
I have a script for building these kinds of diagrams visually:


<http://www.math.purdue.edu/~dvb/scripts/arraymaker>


If it's useful to you, help yourself.


