Use imgmath for pdf output

Author: rantahar

.github/workflows/sphinx.yml

@@ -101,7 +101,7 @@ jobs:
         if: ${{ env.GENERATE_PDF == 'true' }}
         run: |
           pip install https://github.com/rkdarst/sphinx_pyppeteer_builder/archive/refs/heads/main.zip
-          make pyppeteer
+          make SPHINXOPTS="-t pdf" pyppeteer
           mv _build/pyppeteer/*.pdf _build/dirhtml/${PDF_FILENAME}
 
       # Stage all deployed assets in _gh-pages/ for simplicity, and to

content/conf.py

@@ -39,6 +39,11 @@
     "sphinx_coderefinery_branding",
 ]
 
+
+if 'pdf' in tags:
+    # Use imgmath for PDF output
+    extensions.append("sphinx.ext.imgmath")
+
 # Settings for myst_nb:
 # https://myst-nb.readthedocs.io/en/latest/use/execute.html#triggering-notebook-execution
 nb_execution_mode = "cache"