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Comment by davesque | Hacker News Reader

I'm trying to figure out if this is using MathJax or KaTeX or what. Pretty neat with the number tetrahedrons.

It does use KaTeX, last line before </head>:

    <link rel="stylesheet" href="/assets/katex.min.css">

Yeah this is KaTeX, pre-rendered with Jekyll.

(Except for the diagrams, which are inserted by a Python script after the KaTeX rendering is done.)