Do Latex diagrams work in the preview mode?

[Stephen Tashi]

I pasted examples (taken from old threads) of doing commutative diagrams in LaTex into the message editor and tried them in the preview mode. They didn't display. Should a correct example work in the preview mode?

I'll paste a couple in this message and see if they show up in the final post.

##\begin{array}{ccccc} ~ & ~ & f & ~ & ~ \\ ~ & A & \longrightarrow & B & ~ \\ g & \downarrow & ~ & \downarrow & h \\ ~ & C & \longrightarrow & D & ~ \\ ~ & ~ & k & ~ & ~ \end{array}##

##
\documentclass{article}
\usepackage{graphics}
\begin{document}
\begin{figure}
\includegraphics{sin}
\caption{\label{sin}The sine function.}
\end{figure}
\end{document}
##

 

[DaveE]

I pasted examples (taken from old threads) of doing commutative diagrams in LaTex into the message editor and tried them in the preview mode. They didn't display. Should a correct example work in the preview mode?

I'll paste a couple in this message and see if they show up in the final post.

##\begin{array}{ccccc} ~ & ~ & f & ~ & ~ \\ ~ & A & \longrightarrow & B & ~ \\ g & \downarrow & ~ & \downarrow & h \\ ~ & C & \longrightarrow & D & ~ \\ ~ & ~ & k & ~ & ~ \end{array}##

##
\documentclass{article}
\usepackage{graphics}
\begin{document}
\begin{figure}
\includegraphics{sin}
\caption{\label{sin}The sine function.}
\end{figure}
\end{document}
##

This one worked for me in preview mode (Win 11, Chrome).

##\begin{array}{ccccc} ~ & ~ & f & ~ & ~ \\ ~ & A & \longrightarrow & B & ~ \\ g & \downarrow & ~ & \downarrow & h \\ ~ & C & \longrightarrow & D & ~ \\ ~ & ~ & k & ~ & ~ \end{array}##

The other one gives me the same error.

 

[Nugatory]

Compare the underlying Latex and you'll see why one works and the other does not - our MathJax implementation has some idiosyncracies. A second confounding factor is that MathJax is loaded lazily so that sometimes the Latex won't be processed at all (neither the typesetting you expected nor an error) until the page is refreshed.

 

[Stephen Tashi]

Are there hints for getting Latex to work reliably in the message editor's preview mode?

 

[Ibix]

Are there hints for getting Latex to work reliably in the message editor's preview mode?

If you are starting a new thread, no, you're stuck. Try laying out your post as a reply to something then cut and paste it to your new thread.

If you are replying the put some LaTeX in your post and preview it. If there's already LaTeX in the page it should render. If not, it won't render. In that case, refresh the page while still in preview mode. Preview again and the LaTeX should render.