link, thanks on category theory page

Signed-off-by: Jim Pryor <profjim@jimpryor.net>

diff --git a/advanced_topics/monads_in_category_theory.mdwn b/advanced_topics/monads_in_category_theory.mdwn
index 87c7886..0cdb5ab 100644 (file)
--- a/advanced_topics/monads_in_category_theory.mdwn
+++ b/advanced_topics/monads_in_category_theory.mdwn
@@ -18,6 +18,10 @@ me to be a reasonable way to put the pieces together. We very much welcome
 feedback from anyone who understands these issues better, and will make
 corrections.
 
+Thanks Wren Thornton for helpful comments on these notes (not yet incorporated).
+
+[This page](http://en.wikibooks.org/wiki/Haskell/Category_theory) was a helpful starting point.
+
 
 Monoids
 -------