converting html to pdf - no equations

[wrobell]

Trying to convert a page to PDF with

$ pandoc --pdf-engine=xelatex -f html -t latex https://mlg.eng.cam.ac.uk/blog/2021/03/31/what-keeps-a-bayesian-awake-at-night-part-1.html -o what-keeps.pdf

The equations in PDF file are

$ pandoc --version
pandoc 3.1.11.1
Features: +server +lua
Scripting engine: Lua 5.4
User data directory: /home/wrobell/.local/share/pandoc
Copyright (C) 2006-2023 John MacFarlane. Web: https://pandoc.org
This is free software; see the source for copying conditions. There is no
warranty, not even for merchantability or fitness for a particular purpose.

Seems to be related to #2758

[jgm]

The HTML contains things like

<p>\begin{equation}
    p(D) = \int p(\theta) \prod_{n=1}^N p(D_n \cond \theta) \,\mathrm{d}\theta.
\end{equation}</p>

So you need to enable the raw_tex extension: try with -f html+raw_tex+tex_math_dollars.

[wrobell]

@jgm thanks for the suggestions, i have tried:

greymatter$ pandoc --pdf-engine=xelatex -f html+raw_tex+tex_math_dollars -t latex https://mlg.eng.cam.ac.uk/blog/2021/03/31/what-keeps-a-bayesian-awake-at-night-part-1.html -o what-keeps.pdf
Error producing PDF.
! Undefined control sequence.
l.183     p( X \cond

greymatter$ pandoc --pdf-engine=xelatex -f html+tex_math_dollars -t latex https://mlg.eng.cam.ac.uk/blog/2021/03/31/what-keeps-a-bayesian-awake-at-night-part-1.html -o what-keeps.pdf
Error producing PDF.
! Undefined control sequence.
l.190 variables (\(\hat X_{\text{MAP}} = \argmax

greymatter$ pandoc --pdf-engine=xelatex -f html+raw_tex -t latex https://mlg.eng.cam.ac.uk/blog/2021/03/31/what-keeps-a-bayesian-awake-at-night-part-1.html -o what-keeps.pdf
Error producing PDF.
! Undefined control sequence.
l.183     p( X \cond

[jgm]

Well, these aren't pandoc parsing errors; they are errors produced by pdflatex, presumably because it expects some packages to be loaded that our default template doesn't load. You need to figure out what these are and load them (e.g. by adding \usepackage{PACKAGENAME} in header-includes).
See https://tug.ctan.org/info/symbols/comprehensive/symbols-a4.pdf