X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=week1.mdwn;h=9a83861abe305f5d4485d7dc7a7c8e9be24fad8b;hp=897ef1f8ae37429e35509fd2cd0a8de984c12abc;hb=2a3a4803ddfca1692327ab4577fb886139bfc1e7;hpb=ce1b2e16033c1a6757aa33952e1be0aefd3155e6 diff --git a/week1.mdwn b/week1.mdwn index 897ef1f8..9a83861a 100644 --- a/week1.mdwn +++ b/week1.mdwn @@ -70,6 +70,8 @@ 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)