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src/HOL/Order_Relation.thy
changeset 63563 0bcd79da075b
parent 63561 fba08009ff3e
child 63572 c0cbfd2b5a45 
--- a/src/HOL/Order_Relation.thy	Fri Jul 29 11:42:13 2016 +0200
+++ b/src/HOL/Order_Relation.thy	Fri Jul 29 12:44:22 2016 +0200
@@ -55,7 +55,7 @@
   "linear_order_on A r \<Longrightarrow> strict_linear_order_on A (r-Id)"
 by(simp add: order_on_defs trans_diff_Id)
 
-lemma linear_order_on_singleton [iff]: "linear_order_on {x} {(x, x)}"
+lemma linear_order_on_singleton [simp]: "linear_order_on {x} {(x, x)}"
 unfolding order_on_defs by simp
 
 lemma linear_order_on_acyclic:
isabelle