Rendering latex in livebook

[ndrean]

I want to render the latex below in a markdown cell:

$$ \begin{bmatrix} x=0 & \begin{bmatrix} y=0 & \begin{bmatrix} z=0 & a_{0,0,0,0} & a_{0,0,0,1} & a_{0,0,0,2} \\ z=1 & a_{0,0,1,0} & a_{0,0,1,1} & a_{0,0,1,2} \end{bmatrix}\\ y=1 & \begin{bmatrix} z=0 & a_{0,1,0,0} & a_{0,1,0,1} & a_{0,1,0,2} \\ z=1 & a_{0,1,1,0} & a_{0,1,1,1} & a_{0,1,1,2} \\ \end{bmatrix}\\ y=2 & \begin{bmatrix} z=0 & a_{0,2,0,0} & a_{0,2,0,1} & a_{0,2,0,2} \\ z=1 & a_{0,2,1,0} & a_{0,2,1,1} & a_{0,2,1,2} \\ \end{bmatrix} \end{bmatrix} \\ x=1 & \begin{bmatrix} y=0 & \begin{bmatrix} z=0 & a_{1,0,0,0} & a_{1,0,0,1} & a_{1,0,0,2} \\ z=1 & a_{1,0,1,0} & a_{1,0,1,1} & a_{1,0,1,2} \\ \end{bmatrix}\\ y=1 & \begin{bmatrix} z=0 & a_{1,1,0,0} & a_{1,1,0,1} & a_{1,1,0,2} \\ z=1 & a_{1,1,1,0} & a_{1,1,1,1} & a_{1,1,1,2} \\ \end{bmatrix}\\ y=2 & \begin{bmatrix} z=0 & a_{1,2,0,0} & a_{1,2,0,1} & a_{1,2,0,2} \\ z=1 & a_{1,2,1,0} & a_{1,2,1,1} & a_{1,2,1,2} \\ \end{bmatrix} \end{bmatrix} \end{bmatrix} \equiv \begin{bmatrix} \begin{bmatrix} \begin{bmatrix} & 1, 2, 3, & \\ & 1, -2, 3, & \end{bmatrix} \\ \begin{bmatrix} & 4, -3, 2 & \\ & -4, 3, 2 & \end{bmatrix}\\ \begin{bmatrix} & 5, -1, 3 &\\ & -5, 1, 3 & \end{bmatrix} \end{bmatrix} \\ \begin{bmatrix} \begin{bmatrix} & 4, 6, 1 & \\ & 4, -6, 1 & \end{bmatrix}\\ \begin{bmatrix} & 1, 2, 3 & \\ & 1, -2, 3 & \end{bmatrix}\\ \begin{bmatrix} & 4, -3, 2 & \\ & -4, 3, 2 & \end{bmatrix} \end{bmatrix} \end{bmatrix} $$

This is written in a file. When I open this file with Livebook, I have a rendering error as seen below. Any clue?
I went to Sublime with no add-on, same thing.

$$
begin{bmatrix}
x=0 &
\begin{bmatrix}

y=0 &
\begin{bmatrix}
  z=0 & a_{0,0,0,0} & a_{0,0,0,1} & a_{0,0,0,2} \\
  z=1 & a_{0,0,1,0} & a_{0,0,1,1} & a_{0,0,1,2}
\end{bmatrix}\\
y=1 &
\begin{bmatrix}
  z=0 & a_{0,1,0,0} & a_{0,1,0,1} & a_{0,1,0,2} \\
  z=1 & a_{0,1,1,0} & a_{0,1,1,1} & a_{0,1,1,2} \\
\end{bmatrix}\\
y=2 &
\begin{bmatrix}
  z=0 & a_{0,2,0,0} & a_{0,2,0,1} & a_{0,2,0,2} \\
  z=1 & a_{0,2,1,0} & a_{0,2,1,1} & a_{0,2,1,2} \\
\end{bmatrix}

\end{bmatrix} \
x=1 &
\begin{bmatrix}

y=0 &
\begin{bmatrix}
  z=0 & a_{1,0,0,0} & a_{1,0,0,1} & a_{1,0,0,2}  \\
  z=1 & a_{1,0,1,0} & a_{1,0,1,1} & a_{1,0,1,2} \\
\end{bmatrix}\\
y=1 &
\begin{bmatrix}
  z=0 & a_{1,1,0,0} & a_{1,1,0,1} & a_{1,1,0,2}  \\
  z=1 & a_{1,1,1,0} & a_{1,1,1,1} & a_{1,1,1,2} \\
\end{bmatrix}\\
y=2 &
\begin{bmatrix}
  z=0 & a_{1,2,0,0} & a_{1,2,0,1} & a_{1,2,0,2}  \\
  z=1 & a_{1,2,1,0} & a_{1,2,1,1} & a_{1,2,1,2} \\
\end{bmatrix}

\end{bmatrix}
\end{bmatrix}
\equiv
\begin{bmatrix}
\begin{bmatrix}

\begin{bmatrix}
  & 1, 2, 3, & \\
  & 1, -2, 3, &
\end{bmatrix} \\
\begin{bmatrix}
  & 4, -3, 2 & \\
  & -4, 3, 2 &
\end{bmatrix}\\
\begin{bmatrix}
  & 5, -1, 3 &\\
  & -5, 1, 3 &
\end{bmatrix}

\end{bmatrix} \
\begin{bmatrix}

\begin{bmatrix}
  & 4, 6, 1 & \\
  & 4, -6, 1 &
\end{bmatrix}\\
\begin{bmatrix}
  & 1, 2, 3 & \\
  & 1, -2, 3 &
\end{bmatrix}\\
\begin{bmatrix}
  & 4, -3, 2 & \\
  & -4, 3, 2 &
\end{bmatrix}

\end{bmatrix}
\end{bmatrix}
$$

[jonatanklosko]

Hey @ndrean! This is cause by the indentations you have in the TeX math, if you de-indent the lines it should work fine. This comes down from a limitation in the Markdown processing library we use, which currently doesn't really recognise math blocks in $$, and indentation is parsed as code snippets. We made math blocks work in most cases by disabling parsing inside blocks themselves, but since code snippets are separate blocks it breaks in this case.

I hope eventually we can improve the math support upstream, but for now avoiding indentation is the way to go :<

[ndrean]

Waoo, for such very basic latex, I really doubted. I tried different editors, checked online with Katex, removed white lines, and even put everything in one ugly long line without success.....but now that I try again by simply removing every single indent, it works.... probably missed a few. . Well, a couple of hours of playing! :) Thks Jonatan