Is it possible to use latex packages in an Rmarkdown to be knit as an HTML? The following reproducible example works with the PDF format, but not with HTML. Matrix 1 is a simple latex matrix which does not require any extra package, but matrix 2 makes use of the blkarray and amsmath packages.
---
title: "test"
author: ""
date: "9/26/2019"
header-includes:
- \usepackage{blkarray}
- \usepackage{amsmath}
output: bookdown::html_document2
---
\```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
\```
# Matrix 1
\begin{bmatrix}
1 & 1 \\
0 & 0
\end{bmatrix}
# Matrix 2
\begin{blockarray}{cccccc}
a & b & c & d & e \\
\begin{block}{(ccccc)c}
1 & 1 & 1 & 1 & 1 & f \\
0 & 1 & 0 & 0 & 1 & g \\
0 & 0 & 1 & 0 & 1 & h \\
0 & 0 & 0 & 1 & 1 & i \\
0 & 0 & 0 & 0 & 1 & j \\
\end{block}
\end{blockarray}