\documentclass{amsart}  %First, compile a pdf with pdflatex.  Next, use pdfcrop (command line).  Finally use pdf2svg to convert to svg  \usepackage{xypic} \xyoption{all}  \begin{document} \thispagestyle{empty} $$ \xymatrix{ \operatorname{GL}(V)\ar[rr]^r&&\operatorname{PGL}(V)\\ \operatorname{SL}(2,\mathbb C)\ar[rr]^p\ar[u]^\Phi&&\operatorname{SO}^+(3,1)\ar[u]^{\Pi^*}\ar@{-->}[llu]^\Pi\\ \mathfrak{sl}(2,\mathbb C)\ar[rr]^\sigma\ar[u]^{\operatorname{exp}}\ar[rd]^\Phi&&\mathfrak{so}(3,1)\ar[u]^{\operatorname{exp}}\ar[ld]^\pi\\ &\operatorname{End}(V)& } $$