add a math example

scripts/slides_to_html.sh

@@ -9,7 +9,7 @@ for filename in  $*
 do
   echo compiling $filename
   file_out=`echo $filename | sed -e 's/\.md/\.html/g'`
-  sed -e "s|SLIDEHEAD|$headEscapedForSed|g" $filename | pandoc -s --mathjax -t revealjs -o html/$file_out --slide-level=$SLIDE_LEVEL --highlight-style=$HIGHLIGHT_STYLE -V revealjs-url=https://unpkg.com/reveal.js@5.2.0 --template=./templates/template.revealjs --css custom.css
+  sed -e "s|SLIDEHEAD|$headEscapedForSed|g" $filename | pandoc -s --mathjax="https://cdn.jsdelivr.net/npm/mathjax@2/MathJax.js?config=TeX-AMS_HTML" -t revealjs -o html/$file_out --slide-level=$SLIDE_LEVEL --highlight-style=$HIGHLIGHT_STYLE -V revealjs-url=https://unpkg.com/reveal.js@5.2.0 --template=./templates/template.revealjs --css=./custom.css --toc --toc-depth=1
   if [ -f ./templates/custom.css ]; then
     cp -n ./templates/custom.css ./html/custom.css
   fi

slides.md

@@ -33,3 +33,7 @@ import this
 for i in range(10):
     print("Hello world")
 ```
+
+# Some math
+
+$$\bar{x}_w = \frac{\sum_{i=1}^n w_i x_i}{\sum_{i=1}^n w_i} $$