From: Jim Pryor <profjim@jimpryor.net>
Date: Sun, 3 Oct 2010 17:30:20 +0000 (-0400)
Subject: week4 tweaks
X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=commitdiff_plain;h=335ce8bda8cc7d2bd46710cf024454cca9a21fee;hp=3ed508aa627b89b62239723c3f20a971d8f5aed1

week4 tweaks

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

diff --git a/week4.mdwn b/week4.mdwn
index e1dcc4e9..83d54df1 100644
--- a/week4.mdwn
+++ b/week4.mdwn
@@ -27,10 +27,10 @@ A: Right:
 
 <pre><code>let Y = \T. (\x. T (x x)) (\x. T (x x)) in
 Y Y &equiv; \T. (\x. T (x x)) (\x. T (x x)) Y
-	~~> (\x. Y (x x)) (\x. Y (x x))
-	~~> Y ((\x. Y (x x)) (\x. Y (x x)))
-	~~> Y (Y ((\x. Y (x x)) (\x. Y (x x))))
-	~~> Y (Y (Y (...(Y (Y Y))...)))</code></pre>
+~~> (\x. Y (x x)) (\x. Y (x x))
+~~> Y ((\x. Y (x x)) (\x. Y (x x)))
+~~> Y (Y ((\x. Y (x x)) (\x. Y (x x))))
+~~> Y (Y (Y (...(Y (Y Y))...)))</code></pre>
 
 #Q: Ouch!  Stop hurting my brain.#
 
@@ -49,9 +49,9 @@ successor.  Let's just check that `X = succ X`:
 <pre><code>let succ = \n s z. s (n s z) in
 let X = (\x. succ (x x)) (\x. succ (x x)) in
 succ X 
-  &equiv; succ ( (\x. succ (x x)) (\x. succ (x x)) ) 
-  ~~> succ (succ ( (\x. succ (x x)) (\x. succ (x x))))
-  &equiv; succ (succ X)</code></pre>
+&equiv; succ ( (\x. succ (x x)) (\x. succ (x x)) ) 
+~~> succ (succ ( (\x. succ (x x)) (\x. succ (x x))))
+&equiv; succ (succ X)</code></pre>
 
 You should see the close similarity with `Y Y` here.