X-Git-Url: http://lambda.jimpryor.net/git/gitweb.cgi?p=lambda.git;a=blobdiff_plain;f=week1.mdwn;h=c13fa7ca8787de96d87d81694544064fa1654522;hp=0207f0ceae92b3e0eafc4513fa279d8007de294e;hb=93600ef645fa8bbb304288ea2161ec06b017762e;hpb=6ca041c08f7d5eccc1550af16de405c66fb23139
diff --git a/week1.mdwn b/week1.mdwn
index 0207f0ce..c13fa7ca 100644
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@@ -59,7 +59,6 @@ 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'll probably just say "term" and "expression" indiscriminately for expressions of any of these three forms.
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Examples of expressions:
x
@@ -71,8 +70,6 @@ Examples of expressions:
(x (\x x))
((\x (x x)) (\x (x x)))
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-
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:
@@ -606,7 +603,6 @@ Here's how it looks to say the same thing in various of these languages.
It's easy to be lulled into thinking this is a kind of imperative construction. *But it's not!* It's really just a shorthand for the compound "let"-expressions we've already been looking at, taking the maximum syntactically permissible scope. (Compare the "dot" convention in the lambda calculus, discussed above.)
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9. Some shorthand
OCaml permits you to abbreviate:
@@ -655,6 +651,8 @@ Here's how it looks to say the same thing in various of these languages.
or in other words, interpret the rest of the file or interactive session with `bar` assigned the function `(lambda (x) B)`.
+
Some more comparisons between Scheme and OCaml
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