I'm trying to make a commutative diagram while using the spanish babel package but I'm encountering some problems.
I've made two MWE; one that doesn't work and one that does:
\documentclass{article}
\usepackage[spanish]{babel}
\usepackage{tikz-cd}
\begin{document}
\begin{tikzcd}
G \arrow[d, "\varepsilon"', two heads] \arrow[r, "\varphi"] & H \\
G/N \arrow[ru, "\varphi"', dashed] &
\end{tikzcd}
\end{document}
and
\documentclass{article}
\usepackage{tikz-cd}
\begin{document}
\begin{tikzcd}
G \arrow[d, "\varepsilon"', two heads] \arrow[r, "\varphi"] & H \\
G/N \arrow[ru, "\varphi"', dashed] &
\end{tikzcd}
\end{document}
The former fails to work while the latter works just fine. The only difference being the spanish babel package. I really need to use both the package and the tikz-cd environment. Is there a way of doing so?
Here is a picture of the desired output (which is the result of the second piece of code). I want this while having the spanish babel package loaded.
Edit: I just noticed that if I remove the names of the arrows (\varepsilon and \varphi) then it compiles just fine (I want to have those though).
Best Answer
Spanish
babel
makes"
into an active character which kills\arrow[d, "\varepsilon"', two heads]
As this is quite common there is a
tikz
library to fix is, just addafter loading
tikz-cd
and the example compiles again