% !TEX TS-program = XeLaTeX
% Commands for running this example:
% 	 xelatex color-math2
% End of Commands
\documentclass{article}
\pagestyle{empty}
\usepackage{color,amscd,amsmath}
\usepackage[all]{	XY}
\usepackage{xepersian}
\settextfont{Persian Modern}
\begin{document}

\begin{displaymath}
\xymatrix@1{
R \ar[rr]^{\gamma} \ar @{->} @< 2pt> [dd]^{t} \ar @{ ->} @<-2pt> [dd]_{h} &&
R' \ar @{->} @< 2pt> [dd]^{t'} \ar @{ ->} @<-2pt> [dd]_{h'} \\ \\
G \ar[rr]^{\rho} \ar@/^1pc/[uu]^{e} &&  G' \ar@/_1pc/[uu]_{e'}}
\end{displaymath}\\

\end{document}