Commutative diagrams for lift

Question

how can i draw following diagram in latex ?

Answer 1

With tikz-cd:

\documentclass{article}
\usepackage{tikz-cd}
\begin{document}
\[
\begin{tikzcd}
&Z\ar[d, "g"]\\
X\ar[r, "f"]\ar[ru, "h"]&Y
\end{tikzcd}
\]
\end{document}