X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=week1.mdwn;h=48bc6b593f8b5ff11f8e2f966f9eb6580704cb1d;hp=897ef1f8ae37429e35509fd2cd0a8de984c12abc;hb=6c49eb332507fd00c786264c48cf519cb150b8b5;hpb=ce1b2e16033c1a6757aa33952e1be0aefd3155e6 diff --git a/week1.mdwn b/week1.mdwn index 897ef1f8..48bc6b59 100644 --- a/week1.mdwn +++ b/week1.mdwn @@ -70,6 +70,7 @@ Examples of expressions: (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)