(no commit message)

diff --git a/topics/_week5_system_F.mdwn b/topics/_week5_system_F.mdwn
index ae0b7e0..e69eeb4 100644 (file)
--- a/topics/_week5_system_F.mdwn
+++ b/topics/_week5_system_F.mdwn
@@ -34,8 +34,7 @@ notational convention (which will last throughout the rest of the
 course) that "<code>x:&alpha;</code>" represents an expression `x`
 whose type is <code>&alpha;</code>.
 
 course) that "<code>x:&alpha;</code>" represents an expression `x`
 whose type is <code>&alpha;</code>.
 

-Then System F can be specified as follows (choosing notation that will
-match up with usage in O'Caml, whose type system is based on System F):
+Then System F can be specified as follows:

 
        System F:
        ---------
 
        System F:
        ---------


@@ -47,7 +46,7 @@ constants play the role in System F that base types play in the
 simply-typed lambda calculus.  So in a lingusitics context, type
 constants might include `e` and `t`.  "α" is a type variable.  The
 tick mark just indicates that the variable ranges over types rather
 simply-typed lambda calculus.  So in a lingusitics context, type
 constants might include `e` and `t`.  "α" is a type variable.  The
 tick mark just indicates that the variable ranges over types rather

-than over values; in various discussion below and later, type variable
+than over values; in various discussion below and later, type variables

 can be distinguished by using letters from the greek alphabet
 (&alpha;, &beta;, etc.), or by using capital roman letters (X, Y,
 etc.).  "`τ1 -> τ2`" is the type of a function from expressions of
 can be distinguished by using letters from the greek alphabet
 (&alpha;, &beta;, etc.), or by using capital roman letters (X, Y,
 etc.).  "`τ1 -> τ2`" is the type of a function from expressions of


@@ -57,7 +56,7 @@ universal type, since it universally quantifies over the type variable
 have at least one free occurrence of `α` somewhere inside of it.
 
 In the definition of the expressions, we have variables "`x`" as usual.
 have at least one free occurrence of `α` somewhere inside of it.
 
 In the definition of the expressions, we have variables "`x`" as usual.

-Abstracts "`λx:τ. e`" are similar to abstracts in the simply-typed lambda
+Abstracts "`λx:τ.e`" are similar to abstracts in the simply-typed lambda

 calculus, except that they have their shrug variable annotated with a
 type.  Applications "`e1 e2`" are just like in the simply-typed lambda calculus.
 
 calculus, except that they have their shrug variable annotated with a
 type.  Applications "`e1 e2`" are just like in the simply-typed lambda calculus.