\documentclass{standalone} \usepackage[utf8x]{inputenc} \usepackage{amsmath} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{newtxtext} \usepackage[libertine]{newtxmath}  \usepackage{tikz-cd}  \begin{document} \begin{tikzcd}[row sep=large] Y \arrow[d, dashed, "g"]  &  U(Y) \arrow[d, dashed, "U(g)"] \arrow[rd, "f"] &                                     \\ A                         &  U(A) \arrow[r, "\phi"]                         &  X                                  \\ \end{tikzcd} \end{document}