src/HOL/BNF_Wellorder_Embedding.thy
changeset 63092 a949b2a5f51d
parent 61799 4cf66f21b764
child 67091 1393c2340eec
--- a/src/HOL/BNF_Wellorder_Embedding.thy	Fri May 13 20:22:02 2016 +0200
+++ b/src/HOL/BNF_Wellorder_Embedding.thy	Fri May 13 20:24:10 2016 +0200
@@ -986,7 +986,7 @@
 
 lemma iso_Field:
 "iso r r' f \<Longrightarrow> f ` (Field r) = Field r'"
-using assms by (auto simp add: iso_def bij_betw_def)
+by (auto simp add: iso_def bij_betw_def)
 
 lemma iso_iff:
 assumes "Well_order r"