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src/HOL/Inductive.thy
changeset 41081 fb1e5377143d
parent 39776 cde508d2eac8
child 43324 2b47822868e4 
--- a/src/HOL/Inductive.thy	Wed Dec 08 14:52:23 2010 +0100
+++ b/src/HOL/Inductive.thy	Wed Dec 08 14:52:23 2010 +0100
@@ -217,7 +217,8 @@
 lemma coinduct3: 
   "[| mono(f);  a:X;  X \<subseteq> f(lfp(%x. f(x) Un X Un gfp(f))) |] ==> a : gfp(f)"
 apply (rule coinduct3_lemma [THEN [2] weak_coinduct])
-apply (rule coinduct3_mono_lemma [THEN lfp_unfold, THEN ssubst], auto)
+apply (rule coinduct3_mono_lemma [THEN lfp_unfold, THEN ssubst])
+apply (simp_all)
 done
isabelle