get mathjax working

tgdwyer · tgdwyer · commit 5ad1e9f58d24 · 2025-09-09T20:27:04.000+10:00
diff --git a/_chapters/haskell1.md b/_chapters/haskell1.md
@@ -234,11 +234,11 @@ However, lazy by default sets Haskell apart.  It has pros and cons; on the pro s
 But there are definitely cons:
 
 - It can be hard to reason about runtime performance
-- Mixing up strict and lazy evaluation (which can happen inadvertently) can lead to (for example) O(n<sup>2</sup>) behaviour in what should be linear time processing.
+- Mixing up strict and lazy evaluation (which can happen inadvertently) can lead to (for example) $\mathcal{O}(n^2)$ behaviour in what should be linear time processing.
 
 ## Lazy infinite lists
 
-Note that our "Hello world!" function to recursively compute the $n^{th}$ Fibonacci number [above](#starting-with-the-ghci-repl) was not at all efficient (in fact $O(2^n)$).  We will now demonstrate a very idiomatic haskell construction for defining a lazy sequence of Fibonacci numbers that is linear time in the number of fibs required.  In the following definition for `lazyFibs`, `zipWith` is a function which uses the specified function (in this case `(+)`) to pair the heads of two given lists.  In this case, we are zipping over recursive references to `lazyFibs` and `tail lazyFibs`.
+Note that our "Hello world!" function to recursively compute the $n^\text{th}$ Fibonacci number [above](#starting-with-the-ghci-repl) was not at all efficient (in fact $\mathcal{O}(2^n)$).  We will now demonstrate a very idiomatic haskell construction for defining a lazy sequence of Fibonacci numbers that is linear time in the number of fibs required.  In the following definition for `lazyFibs`, `zipWith` is a function which uses the specified function (in this case `(+)`) to pair the heads of two given lists.  In this case, we are zipping over recursive references to `lazyFibs` and `tail lazyFibs`.
 
 ```haskell
 lazyFibs = 1 : 1 : zipWith (+) lazyFibs (tail lazyFibs)
diff --git a/_includes/head.html b/_includes/head.html
@@ -12,4 +12,12 @@
   
     {%- include custom-head.html -%}
     
+    <!-- MathJax v3 -->
+<script>
+  window.MathJax = {
+    tex: { inlineMath: [['$','$'], ['\\(','\\)']], processEscapes: true }
+  };
+</script>
+<script defer src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-chtml.js"></script>
+    
   </head>
diff --git a/_layouts/base.html b/_layouts/base.html
@@ -3,7 +3,6 @@
 
   {%- include head.html -%}
   <script src="{{ "/assets/js/spoilers.js" | relative_url }}" defer></script>
-  <script src="https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML" type="text/javascript"></script>
   <body>
 
     {%- include header.html -%}
