%Note: Add the -shell-escape flag to the compilation command to compile directly to an image. %For .pdf files, use \documentclass[preview]{standalone}%For .png files, (see http://tex.stackexchange.com/q/11866 for more info) use: \documentclass[convert={density=300,size=1080x800,outext=.png}]{standalone}%For .svg files you need pdf2svg installed (see https://tex.stackexchange.com/a/51766/187911 for more info) use:\documentclass[convert={outext=.svg,command=\unexpanded{pdf2svg \infile\space\outfile}},multi=false]{standalone}\usepackage{tikz}\usetikzlibrary{matrix,arrows,decorations.pathmorphing}\usepackage[all]{xy}\begin{document}\begin{tikzpicture}[scale=2.5]
\node (MI) at (0,1) {$M^i$};
\node (MJ) at (1.5,1) {$M^j$};
\node (NALPHAI) at (0,0) {$N^{\alpha(i)}$};
\node (NALPHAJ) at (1.5,0) {$N^{\alpha(j)}$};
\path[->,font=\scriptsize,>=angle 90]
(MI) edge node[above]{\scalebox{1.5}{$\mu_{i}^{j}$}} (MJ)
(MI) edge node[right]{\scalebox{1.5}{$F^{i}$}} (NALPHAI)
(MJ) edge node[right]{\scalebox{1.5}{$F^{j}$}} (NALPHAJ)
(NALPHAI) edge node[above]{\scalebox{1.5}{$\nu_{\alpha(i)}^{\alpha(j)}$}} (NALPHAJ);
\end{tikzpicture}\end{document}
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