X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=week1.mdwn;h=801ae6984609be27b76abc8ca7f378fc93020dc6;hp=f09f393d653bc0f8cdc0dbc677a6bbfd04b4e775;hb=787216b36925c3757985a48ced39d6eee1ee5392;hpb=5739a5066020a0e9dd46e0299165faadb59fc438 diff --git a/week1.mdwn b/week1.mdwn index f09f393d..801ae698 100644 --- a/week1.mdwn +++ b/week1.mdwn @@ -57,8 +57,9 @@ We'll tend to write (λa M) as just `(\a M)`, so we don't hav Application: (M N) -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 @@ -69,6 +70,7 @@ Examples of expressions: (\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