Please change the link to the original source:

https://arxiv.org/abs/1802.01528

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EDIT: It turns out explained.ai is the personal website of one of the authors, so there's no need to change the link. See comment below.

:) Yeah, I use my own internal markdown to generate really nice html (with fast latex-derived images for equations) and then full-on latex. (tool is https://github.com/parrt/bookish)

I prefer reading on the web unless I'm offline. The latex its super handy for printing a nice document.