X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=week1.mdwn;h=c9b52d1d52acead984f8a6149cdb62db2a39c111;hb=fceb99fda0c4287f9f3c476a26c6e202cf5e26c5;hp=2c686583929b8e65d537b04ada523f7909c45813;hpb=74149f64a2c684075745513abc97730f034a65d4;p=lambda.git

diff --git a/week1.mdwn b/week1.mdwn
index 2c686583..c9b52d1d 100644
--- a/week1.mdwn
+++ b/week1.mdwn
@@ -57,24 +57,17 @@ We'll tend to write <code>(&lambda;a M)</code> as just `(\a M)`, so we don't hav
 <strong>Application</strong>: <code>(M N)</code>
 </blockquote>
 
-Some *authors* reserve the term "term" for just variables and abstracts. We won't participate in that convention; we'll probably just say "term" and "expression" indiscriminately for expressions of any of these three forms.
+Some authors reserve the term "term" for just variables and abstracts. We'll probably just say "term" and "expression" indiscriminately for expressions of any of these three forms.
 
 Examples of expressions:
 
 	x
-	(y x)
-	(x x)
-	(\x y)
-	(\x x)
-	(\x (\y x))
-	(x (\x x))
-	((\x (x x)) (\x (x x)))
 
 The lambda calculus has an associated proof theory. For now, we can regard the
 proof theory as having just one rule, called the rule of **beta-reduction** or
 "beta-contraction". Suppose you have some expression of the form:
 
-	((\a M) N)
+	((\ a M) N)
 
 that is, an application of an abstract to some other expression. This compound form is called a **redex**, meaning it's a "beta-reducible expression." `(\a M)` is called the **head** of the redex; `N` is called the **argument**, and `M` is called the **body**.