--- a/src/HOL/Fun.thy Tue Sep 07 15:56:33 2010 -0700
+++ b/src/HOL/Fun.thy Wed Sep 08 10:45:55 2010 +0200
@@ -18,6 +18,8 @@
apply (simp (no_asm_simp))
done
+lemmas expand_fun_eq = ext_iff
+
lemma apply_inverse:
"f x = u \<Longrightarrow> (\<And>x. P x \<Longrightarrow> g (f x) = x) \<Longrightarrow> P x \<Longrightarrow> x = g u"
by auto
--- 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)