\documentclass{amsart}\usepackage[all, ps, dvips]{xy}% Loading the XY-Pic package% Using postscript driver for smoother curves\usepackage{color}% For invisible frame\begin{document}\thispagestyle{empty}% No page numbers\SelectTips{eu}{}% Euler arrowheads (tips)\setlength{\fboxsep}{0pt}% Frame box margin{\color{white}\framebox{{\color{black}$$% Frame for margin\xymatrix{ %Our diagram is a 3x3 matrix\mathbf{Z}/n \ar@{^(->}[d]\ar@{^(->}[r] & U(1)\ar@{^(->}[d]\ar@{->>}[r]^{z^n} & U(1)\ar[d]^\wr\\SU(n)\ar@{->>}[d]\ar@{^(->}[r] & U(n)\ar@{->>}[d]\ar@{->>}[r]^{\det} & U(1)\\PSU(n)\ar[r]^\sim & PU(n)}$$}}}% end math, end frame\end{document}
2007-11-25 20:10 Nbarth 160×104×0 (50669 bytes) Updated to increase margin.
2007-11-25 19:46 Nbarth 145×93×0 (50906 bytes) Commutative diagram, showing the projective special unitary group and projective unitary group, presented as (sub)quotients the unitary group.
{{Information |Description={{en|Commutative diagram, showing the projective special unitary group and projective unitary group, presented as (sub)quotients the unitary group.}} |Source=en:SVG created as per: [[:en:meta:Help:Displaying_a_formula#Commu