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This is problem specific to tex4ht only.

When compiling this MWE

\documentclass[11pt]{article}
\usepackage{amsmath}
\begin{document}

\[%
\begin{array}
[c]{c}%
\text{{\small bottom edge}}\\
\text{{\small bottom edge}}\\
\end{array}%
\begin{bmatrix}
\alpha & 2\\
1 & \alpha \\
\end{bmatrix}%
\]
\end{document}

Using the command

 make4ht -ulm default foo.tex "htm,mathjax"

The HTML output looks like this

Mathematica graphics

When compiling the same file using lualatex foo.tex the output in pdf looks like

Mathematica graphics

How to make tex4ht output the same as in the pdf?

The raw HTML generated by tex4ht is

<!DOCTYPE html> 
<html lang="en-US" xml:lang="en-US" > 
<head><title></title> 
<meta  charset="utf-8" /> 
<meta name="generator" content="TeX4ht (https://tug.org/tex4ht/)" /> 
<meta name="viewport" content="width=device-width,initial-scale=1" /> 
<link rel="stylesheet" type="text/css" href="foo.css" /> 
<meta name="src" content="foo.tex" /> 
 <script> window.MathJax = { tex: { tags: "ams", inlineMath: [ ["\\\(","\\\)"] ], displayMath: [ ['$$','$$'], ["\\[","\\]"] ], processEscapes: true, processEnvironments: true, packages: ['base', 'color', 'ams'] }, loader: { load: ['[tex]/color', '[tex]/ams'] } }; </script> 
 <script type="text/javascript" async="async" id="MathJax-script" src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml-full.js"></script>  
</head><body 
>
<!--l. 18--><p class="noindent" >\[\begin{array} [c]{c}\text{{\small bottom edge}}\\ \text{{\small bottom edge}}\\ \end{array}\begin{bmatrix} \alpha &amp; 2\\ 1 &amp; \alpha \\ \end{bmatrix}\] </p> 
</body> 
</html>

Using TL 2020 on Linux

4
  • I would say that this is the MathJax issue
    – michal.h21
    May 10, 2020 at 17:53
  • @michal.h21 thanks Michal for looking into it. In this case I will enter a bug report for mathjax today on this using the above as an example.
    – Nasser
    May 10, 2020 at 17:54
  • That will be probably the best thing to do :)
    – michal.h21
    May 10, 2020 at 17:56
  • @michal.h21 FYI, here is link to the bug report. github.com/mathjax/MathJax/issues/2431
    – Nasser
    May 10, 2020 at 18:11

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