--- a/src/HOL/Fun.thy Wed Feb 14 20:44:59 2001 +0100 +++ b/src/HOL/Fun.thy Wed Feb 14 20:45:35 2001 +0100 @@ -42,7 +42,7 @@ o :: ['b => 'c, 'a => 'b, 'a] => 'c (infixl 55) "f o g == %x. f(g(x))" - + inv :: ('a => 'b) => ('b => 'a) "inv(f::'a=>'b) == % y. @x. f(x)=y"