X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=assignment1.mdwn;h=6fd29ee206bea5daf066f60fdef5b70da0c3b196;hp=e6fe829a235857ae77cb78a733a280ca064d8eae;hb=ec7e61a11b6cbbfe9c6c90e6c077c430424317d0;hpb=1e997f71620b8c4a5d5ca6ee9df1d616ff74fae6

diff --git a/assignment1.mdwn b/assignment1.mdwn
index e6fe829a..6fd29ee2 100644
--- a/assignment1.mdwn
+++ b/assignment1.mdwn
@@ -1,18 +1,18 @@
-*Reduction*
+**Reduction**
 
 Find "normal forms" for the following (that is, reduce them as far as it's possible to reduce 
 them):
 
-  1. (\x \y. y x) z
-  2. (\x (x x)) z
-  3. (\x (\x x)) z
-  4. (\x (\z x)) z
-  5. (\x (x (\y y))) (\z (z z))
-  6. (\x (x x)) (\x (x x))
-  7. (\x (x x x)) (\x (x x x))
+    1. (\x \y. y x) z
+    2. (\x (x x)) z
+    3. (\x (\x x)) z
+    4. (\x (\z x)) z
+    5. (\x (x (\y y))) (\z (z z))
+    6. (\x (x x)) (\x (x x))
+    7. (\x (x x x)) (\x (x x x))
 
 
-*Booleans*
+**Booleans**
 
 Recall our definitions of true and false.
 
@@ -26,7 +26,7 @@ In Racket, these can be defined like this:
 
 
 8. Define a "neg" operator that negates "true" and "false".
-Expeceted behavior: (((neg true) 10) 20) evaluates to 20,
+Expected behavior: (((neg true) 10) 20) evaluates to 20,
 (((neg false) 10) 20) evaluates to 10.
 
 9. Define an "and" operator.
@@ -44,6 +44,7 @@ one of those values, call it a black-or-white-value, we should be able to
 write:
 
       	the-black-or-white-value if-black if-white
+
 (where if-black and if-white are anything), and get back one of if-black or
 if-white, depending on which of the black-or-white values we started with. Give
 a definition for each of "black" and "white". (Do it in both lambda calculus