Merge branch 'pytorch:site' into site

Author: brianjo

_includes/head.html

@@ -16,6 +16,15 @@
   <script src="{{ site.baseurl }}/assets/vendor/popper.min.js"></script>
   <script src="{{ site.baseurl }}/assets/vendor/bootstrap.min.js"></script>
   <script src="{{ site.baseurl }}/assets/vendor/anchor.min.js"></script>
+  <script type="text/x-mathjax-config">
+    MathJax.Hub.Config({
+      tex2jax: {
+        skipTags: ['script', 'noscript', 'style', 'textarea', 'pre'],
+        inlineMath: [['$','$']]
+      }
+    });
+  </script>
+  <script src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML" type="text/javascript"></script> 
   <script type="text/javascript" src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script>
   {% if jekyll.environment == 'production' %}
     {% include analytics.html %}