src/HOL/Set.thy

--- a/src/HOL/Set.thy	Tue Sep 07 15:56:33 2010 -0700
+++ b/src/HOL/Set.thy	Wed Sep 08 10:45:55 2010 +0200
@@ -498,6 +498,8 @@
 lemma set_ext_iff [no_atp]: "(A = B) = (ALL x. (x:A) = (x:B))"
 by(auto intro:set_ext)
 
+lemmas expand_set_eq [no_atp] = set_ext_iff
+
 lemma subset_antisym [intro!]: "A \<subseteq> B ==> B \<subseteq> A ==> A = B"
   -- {* Anti-symmetry of the subset relation. *}
   by (iprover intro: set_ext subsetD)