From: Jim Pryor Date: Thu, 16 Sep 2010 01:10:16 +0000 (-0400) Subject: Merge branch 'pryor' X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=commitdiff_plain;h=52f6b3e0ae77b576bdb4599b13267268211df44d;hp=2b49dd93ee877d3a9f868933c9113fbbda94df88 Merge branch 'pryor' --- diff --git a/week1.mdwn b/week1.mdwn index af079edf..db74d7c7 100644 --- a/week1.mdwn +++ b/week1.mdwn @@ -59,7 +59,9 @@ 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. -Samples of expressions +Samples of expressions: + + 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: