--- a/src/HOL/OrderedGroup.thy Fri Nov 30 20:13:05 2007 +0100
+++ b/src/HOL/OrderedGroup.thy Fri Nov 30 20:13:06 2007 +0100
@@ -471,7 +471,7 @@
begin
subclass pordered_cancel_ab_semigroup_add
- by unfold_locales
+ by intro_locales
subclass pordered_ab_semigroup_add_imp_le
proof unfold_locales
@@ -483,7 +483,7 @@
qed
subclass pordered_comm_monoid_add
- by unfold_locales
+ by intro_locales
lemma max_diff_distrib_left:
shows "max x y - z = max (x - z) (y - z)"
@@ -629,7 +629,7 @@
begin
subclass ordered_ab_semigroup_add
- by unfold_locales
+ by intro_locales
subclass pordered_ab_semigroup_add_imp_le
proof unfold_locales
@@ -657,7 +657,7 @@
begin
subclass ordered_cancel_ab_semigroup_add
- by unfold_locales
+ by intro_locales
lemma neg_less_eq_nonneg:
"- a \<le> a \<longleftrightarrow> 0 \<le> a"
@@ -946,8 +946,8 @@
class lordered_ab_group_add = pordered_ab_group_add + lattice
begin
-subclass lordered_ab_group_add_meet by unfold_locales
-subclass lordered_ab_group_add_join by unfold_locales
+subclass lordered_ab_group_add_meet by intro_locales
+subclass lordered_ab_group_add_join by intro_locales
lemmas add_sup_inf_distribs = add_inf_distrib_right add_inf_distrib_left add_sup_distrib_right add_sup_distrib_left