With all this discussion on commutative diagrams, I think it is about time some of you saw what XY-pic can do. Take a look at some of the files on: ftp.mpce.mq.edu.au in the directory: /pub/maths/Quantum -rw-rw-r-- 1 ross ftpmaths 87743 Jun 4 17:43 Section12.ps.Z -rw-rw-r-- 1 ross ftpmaths 66125 Jun 4 17:43 Section12.psfonts.Z -rw-rw-r-- 1 ross ftpmaths 35953 Jun 9 19:42 examples.ps.Z (Actually the June 4 has now been updated to June 9) These are PostScript files, created using dvips If you want a .dvi file instead, then I will put it there upon request. The file Section12.psfonts.Z requires your printer to have access to PostScript versions of the TeX CM fonts, and AMS fonts. (This may also be the case with examples.ps.Z so if anyone has trouble printing this, just let me know and I'll provide an easier version.) Enjoy, Ross Moore. PS: these files require XY-pic 2.7, not yet released. This gives a taste of what is to come, real soon now!! :-) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++