diff -r 1cd2dbdb6a0e -r 03d55eb6a0b7 cws/cw02.tex
--- a/cws/cw02.tex	Sat Nov 09 22:04:53 2019 +0000
+++ b/cws/cw02.tex	Mon Nov 11 13:24:12 2019 +0000
@@ -156,6 +156,7 @@
   \texttt{overlap}(d_1, d_2) = \frac{d_1 \cdot d_2}{max(d_1^2, d_2^2)}  
   \]
 
+  where $d_1^2$ means $d_1 \cdot d_1$ and so on.
   You can expect this function to return a \texttt{Double} between 0 and 1. The
   overlap between the lists in (2) is $0.5384615384615384$.