Respuesta1
Usamos el tikz-cd
paquete -para esto. Si eres principiante, probablemente deberías echar un vistazo aesteeditor en línea.
\documentclass[a4paper]{article}
\usepackage{tikz-cd}
\begin{document}
\begin{tikzcd}[row sep = huge, column sep = huge]
A \arrow[r, "\varphi_1"] \arrow[d, "\varphi_2", swap] \arrow[dd, bend right = 40, "\varphi_8", swap] & B \arrow[d, "\varphi_3"] \arrow[dd, bend left = 40, "\varphi_9"] \\
C \arrow[r, "\varphi_4"] \arrow[d, "\varphi_5", swap] & D \arrow[d, "\varphi_6"] \\
E \arrow[r, "\varphi_7", swap] & F
\end{tikzcd}
\end{document}