% Use PDF2SVG to transform PDF into SVG.
% Author: Ika
% Date: 11/04/2014

\documentclass{amsart}
\usepackage[paperwidth=6cm, paperheight=6cm, top=0cm, left=0cm, right=0cm, bottom=0cm]{geometry}
\usepackage{amsmath,amssymb,nopageno}
\usepackage[all]{xy}
\begin{document}
\Huge
\begin{equation*}
	\xymatrix{
	A \ar@(l,u)^{1_A}[] \ar_{g \circ f}[dr] \ar^f[r] & B \ar@(u,r)^{1_B}[] \ar^g[d]\\
	&C \ar@(d,r)_{1_C}[]
	}
\end{equation*}
\end{document}