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src/HOL/NatArith.thy
changeset 11655 923e4d0d36d5
parent 11454 7514e5e21cb8
child 13297 e4ae0732e2be 
--- a/src/HOL/NatArith.thy	Wed Oct 03 20:54:05 2001 +0200
+++ b/src/HOL/NatArith.thy	Wed Oct 03 20:54:16 2001 +0200
@@ -9,8 +9,8 @@
 
 setup arith_setup
 
-lemma pred_nat_trancl_eq_le: "(m, n) : pred_nat^* = (m <= n)"
-apply (simp add: less_eq reflcl_trancl [THEN sym] 
+lemma pred_nat_trancl_eq_le: "((m, n) : pred_nat^*) = (m <= n)"
+apply (simp add: less_eq reflcl_trancl [symmetric]
             del: reflcl_trancl)
 by arith
isabelle