Are linebreaks supported?

[ZodmanPerth]

I've been trying to output several different formulas on multiple lines, but am unable to get any linebreaks. I've tried pretty much all the methods I found in the KaTeX documentation but had no luck.

For example, using the editor at katex.org, the text

\textcolor{purple}{z}=(\textcolor{green}{c_1} \space choose \space \textcolor{teal}3)+(\textcolor{green}{c_2} \space choose \space \textcolor{teal}2)+(\textcolor{green}{c_3} \space choose \space \textcolor{teal}1)\\
\space\\
OR\\
\space\\
\textcolor{purple}{z}=\bigg(\vcenter{\textcolor{green}{c_1} \atop \textcolor{teal}3}\bigg)+\bigg(\vcenter{\textcolor{green}{c_2} \atop \textcolor{teal}2}\bigg)+\bigg(\vcenter{\textcolor{green}{c_3} \atop \textcolor{teal}1}\bigg)\\

produces

but through hexo-filter-mathjax it produces

I am new to writing math with these TeX type libraries so hopefully I am just doing something wrong, but I can't spot it. Are linebreaks supported in this package?

[stevenjoezhang]

\ may be interpreted by Hexo as an escape character, so you need another \ to escape itself:

\textcolor{purple}{z}=(\textcolor{green}{c_1} \space choose \space \textcolor{teal}3)+(\textcolor{green}{c_2} \space choose \space \textcolor{teal}2)+(\textcolor{green}{c_3} \space choose \space \textcolor{teal}1)\\\\
\space\\\\
OR\\\\
\space\\\\
\textcolor{purple}{z}=\bigg(\vcenter{\textcolor{green}{c_1} \atop \textcolor{teal}3}\bigg)+\bigg(\vcenter{\textcolor{green}{c_2} \atop \textcolor{teal}2}\bigg)+\bigg(\vcenter{\textcolor{green}{c_3} \atop \textcolor{teal}1}\bigg)\\\\

[ZodmanPerth]

No luck. I've also tried \newline. All of them produce a single line result.

[stevenjoezhang]

Have you tried to put it in the eqnarray environment? It's working as expected on my website:

\begin{eqnarray\*}
\textcolor{purple}{z}=(\textcolor{green}{c_1} \space choose \space \textcolor{teal}3)+(\textcolor{green}{c_2} \space choose \space \textcolor{teal}2)+(\textcolor{green}{c_3} \space choose \space \textcolor{teal}1)\\\\
\space\\\\
OR\\\\
\space\\\\
\textcolor{purple}{z}=\bigg(\vcenter{\textcolor{green}{c_1} \atop \textcolor{teal}3}\bigg)+\bigg(\vcenter{\textcolor{green}{c_2} \atop \textcolor{teal}2}\bigg)+\bigg(\vcenter{\textcolor{green}{c_3} \atop \textcolor{teal}1}\bigg)\\\\
\end{eqnarray\*}

[ZodmanPerth]

Well that's odd, this works. I believed I had tried this before, but this now works on my website as well. It's not the layout I want, but at least it appears the library is working properly.

I really want all lines to be centered horizontally, and can't find the right syntax. Looks like I'll have to go with two mathjax blocks separated by a div.

Thanks for your help.

[stevenjoezhang]

Try this:

\begin{eqnarray\*}
&\textcolor{purple}{z}=(\textcolor{green}{c_1} \space choose \space \textcolor{teal}3)+(\textcolor{green}{c_2} \space choose \space \textcolor{teal}2)+(\textcolor{green}{c_3} \space choose \space \textcolor{teal}1)\\\\
&\space\\\\
&OR\\\\
&\space\\\\
&\textcolor{purple}{z}=\bigg(\vcenter{\textcolor{green}{c_1} \atop \textcolor{teal}3}\bigg)+\bigg(\vcenter{\textcolor{green}{c_2} \atop \textcolor{teal}2}\bigg)+\bigg(\vcenter{\textcolor{green}{c_3} \atop \textcolor{teal}1}\bigg)\\\\
\end{eqnarray\*}

See also https://tex.stackexchange.com/questions/114471/how-to-simply-center-equations-using-eqnarray

[ZodmanPerth]

Yes, that works great! Thank you!

Thanks for the link; that helps me improve my google-fu when it comes to these sorts of things.

[stevenjoezhang]

You're welcome :)

MathJax is compatible with most common LaTeX syntax, so you can find answers on this website: https://tex.stackexchange.com