src/HOL/Library/Permutation.thy
changeset 19380 b808efaa5828
parent 17200 3a4d03d1a31b
child 21404 eb85850d3eb7
     1.1 --- a/src/HOL/Library/Permutation.thy	Sun Apr 09 18:51:11 2006 +0200
     1.2 +++ b/src/HOL/Library/Permutation.thy	Sun Apr 09 18:51:13 2006 +0200
     1.3 @@ -11,10 +11,9 @@
     1.4  consts
     1.5    perm :: "('a list * 'a list) set"
     1.6  
     1.7 -syntax
     1.8 -  "_perm" :: "'a list => 'a list => bool"    ("_ <~~> _"  [50, 50] 50)
     1.9 -translations
    1.10 -  "x <~~> y" == "(x, y) \<in> perm"
    1.11 +abbreviation
    1.12 +  perm_rel :: "'a list => 'a list => bool"    ("_ <~~> _"  [50, 50] 50)
    1.13 +  "x <~~> y == (x, y) \<in> perm"
    1.14  
    1.15  inductive perm
    1.16    intros