1.1 --- a/src/HOL/Auth/Message.thy	Wed Sep 20 14:02:41 2006 +0200
     1.2 +++ b/src/HOL/Auth/Message.thy	Wed Sep 20 15:11:46 2006 +0200
     1.3 @@ -941,8 +941,7 @@
     1.4       "X \<in> synth (analz H) ==> parts{X} \<subseteq> synth (analz H) \<union> parts H";
     1.5  apply (rule subset_trans) 
     1.6   apply (erule_tac [2] Fake_parts_insert)
     1.7 -apply (rule parts_mono)  
     1.8 -apply (blast intro: elim:); 
     1.9 +apply (rule parts_mono, blast)
    1.10  done
    1.11  
    1.12  lemmas Fake_parts_sing_imp_Un = Fake_parts_sing [THEN [2] rev_subsetD]