X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=week1.mdwn;h=329333cb85b698af3383539ecb790cc4fc6245ed;hp=db74d7c7f906e09ba2995a71cbadf35d475e5740;hb=0eed138e6dd3ef2582b10cd962bdd030d9069f6b;hpb=52f6b3e0ae77b576bdb4599b13267268211df44d diff --git a/week1.mdwn b/week1.mdwn index db74d7c7..329333cb 100644 --- a/week1.mdwn +++ b/week1.mdwn @@ -59,9 +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 +> 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: