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diff --git a/schedule_of_topics.mdwn b/schedule_of_topics.mdwn
index ca49980..fad5256 100644 (file)
--- a/schedule_of_topics.mdwn
+++ b/schedule_of_topics.mdwn
@@ -28,7 +28,7 @@ This is very sketchy at this point, but it should give a sense of our intended s
 13.    Representing lists as folds
 14.    Typical higher-order functions: map, filter, fold
 
 13.    Representing lists as folds
 14.    Typical higher-order functions: map, filter, fold
 

-15.    Recursion exploiting the fold-like representation of numbers and lists (deforestation, zippers)
+15.    Recursion exploiting the fold-like representation of numbers and lists ([deforestation](http://en.wikipedia.org/wiki/Deforestation_%28computer_science%29), [zippers](http://en.wikipedia.org/wiki/Zipper_%28data_structure%29))

 16.    General recursion using omega
 17.    The Y combinator(s); more on evaluation strategies
 
 16.    General recursion using omega
 17.    The Y combinator(s); more on evaluation strategies