X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=week1.mdwn;h=329333cb85b698af3383539ecb790cc4fc6245ed;hp=48bc6b593f8b5ff11f8e2f966f9eb6580704cb1d;hb=0eed138e6dd3ef2582b10cd962bdd030d9069f6b;hpb=6c49eb332507fd00c786264c48cf519cb150b8b5
diff --git a/week1.mdwn b/week1.mdwn
index 48bc6b59..329333cb 100644
--- a/week1.mdwn
+++ b/week1.mdwn
@@ -59,19 +59,11 @@ We'll tend to write (λa M)
as just `(\a M)`, so we don't hav
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.
-Examples of expressions:
+Samples of expressions:
- x
- (y x)
- (x x)
- (\x y)
- (\x x)
- (\x (\y x))
- (x (\x x))
- ((\x (x x)) (\x (x x)))
+> foo
-
-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: +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)