link to Unit

diff --git a/index.mdwn b/index.mdwn
index 0390350..0c072c8 100644 (file)
--- a/index.mdwn
+++ b/index.mdwn
@@ -110,7 +110,7 @@ The [[differences between our made-up language and Scheme, OCaml, and Haskell|ro
 [[More on Lists|topics/week3 lists]] (expanded on Sunday);
 [[What is computation?|topics/week3_what_is_computation]];
 Reduction Strategies and Normal Forms (in progress);
 [[More on Lists|topics/week3 lists]] (expanded on Sunday);
 [[What is computation?|topics/week3_what_is_computation]];
 Reduction Strategies and Normal Forms (in progress);

-Usefulness of `()` (in progress);
+[[Unit and its usefulness|topics/week3 unit]] (posted on Wednesday);

 [[Combinatory Logic|topics/week3 combinatory logic]] (revised on Monday and Tuesday);
 [[Homework|exercises/assignment3]]
 
 [[Combinatory Logic|topics/week3 combinatory logic]] (revised on Monday and Tuesday);
 [[Homework|exercises/assignment3]]