--- a/src/HOL/Big_Operators.thy Mon Sep 13 08:43:48 2010 +0200
+++ b/src/HOL/Big_Operators.thy Mon Sep 13 11:13:15 2010 +0200
@@ -1504,11 +1504,11 @@
lemma dual_max:
"ord.max (op \<ge>) = min"
- by (auto simp add: ord.max_def_raw min_def ext_iff)
+ by (auto simp add: ord.max_def_raw min_def fun_eq_iff)
lemma dual_min:
"ord.min (op \<ge>) = max"
- by (auto simp add: ord.min_def_raw max_def ext_iff)
+ by (auto simp add: ord.min_def_raw max_def fun_eq_iff)
lemma strict_below_fold1_iff:
assumes "finite A" and "A \<noteq> {}"