# Drawing a commutative diagram [duplicate]

There several codes for commutative diagrams, but I could not find any code for the following diagram:

• try searching using the following, for example, commutative diagrams site:tex.stackexchange.com Apr 1 '18 at 15:17

\documentclass[a4paper,12pt]{article}
\usepackage{tikz-cd}

\begin{document}
\begin{tikzcd}
L \arrow[dd, "\forall \delta"'] \arrow[rr, "\varepsilon"] &  & U(L) \arrow[lldd, "\exists ! f"] \\
&  &  \\
D &  &
\end{tikzcd}
\end{document}

• Rather than doubling rows and columns, I'd enlarge the separation with column sep and row sep. Apr 1 '18 at 15:25

with slightly different code syntax as is in nice Sebastiano answer:-)

\documentclass[border=3mm]{standalone}
\usepackage{tikz-cd}

\begin{document}
%---------------------------------------------------------------%
\begin{tikzcd}[column sep=large, row sep=large]
L
\arrow{r}{\varepsilon}
\arrow[swap]{d}{\forall\delta}
&
U(L)
\arrow{dl}{\exists ! f}   \\
%
D
&
\end{tikzcd}
\end{document}


• Is different and better of mine answer +1. Happy easter. I am scarce as a user. Apr 1 '18 at 15:40
• @Sebastiano, thank you. regarding tikz-cd i'm in learn phase about how to place labels to arrows :-) . from your answer i sow new possibility. happy easter to you to! (i already give + 1 to your answer ;-) ) Apr 1 '18 at 16:01