Summary

LaTeX source

\documentclass{amsart} \usepackage{amsmath,amssymb,nopageno} \usepackage[all]{xy} \begin{document}  \begin{equation*}   \xymatrix@C+2em@R+2em{    & N \ar@/_10pt/[ddl]_*{\psi_X} \ar@/^10pt/[ddr]^*{\psi_Y} \ar@{-->}[d]|*+<5pt,5pt>{u} & \\    & L \ar[dl]_(0.4)*-<1ex,1ex>{\phi_X} \ar[dr]^(0.4)*-<1ex,1ex>{\phi_Y} & \\    F(X) \ar[rr]_*{F(f)} & & F(Y)   }  \end{equation*} \end{document} 

Licensing

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