add #primed

diff --git a/topics/week4_fixed_point_combinators.mdwn b/topics/week4_fixed_point_combinators.mdwn
index 20c2974..a8d1a74 100644 (file)
--- a/topics/week4_fixed_point_combinators.mdwn
+++ b/topics/week4_fixed_point_combinators.mdwn
@@ -519,6 +519,7 @@ Many fixed-point combinators have been discovered. (And as we've seen, some
 fixed-point combinators give us models for building infinitely many
 more, non-equivalent fixed-point combinators.)
 
 fixed-point combinators give us models for building infinitely many
 more, non-equivalent fixed-point combinators.)
 

+<a id=primed></a>

 Two of the simplest:
 
     Θ′ ≡ (\u h. h (\n. u u h n)) (\u h. h (\n. u u h n))
 Two of the simplest:
 
     Θ′ ≡ (\u h. h (\n. u u h n)) (\u h. h (\n. u u h n))