post arithmetic

diff --git a/index.mdwn b/index.mdwn
index f1d8aaa..5fa5afe 100644 (file)
--- a/index.mdwn
+++ b/index.mdwn
@@ -106,7 +106,7 @@ The [[differences between our made-up language and Scheme, OCaml, and Haskell|ro
 *We will continue to develop these notes over the next few days.*
 
 > Topics:
-Arithmetic with Church numbers (in progress);
+[[Arithmetic with Church numbers|topics/week3_church_arithmetic]];
 [[What is computation?|topics/week3_what_is_computation]];
 [[More on Lists|topics/week3 lists]] (will be expanded);
 [[Combinatory Logic|topics/week3 combinatory logic]];