tuned
authornipkow
Mon, 23 Sep 2019 08:43:52 +0200
changeset 70935 be8e617b6eb3
parent 70934 b605c9cf82a2
child 70936 548420d389ea
child 70937 cf7b5020c207
tuned
src/HOL/Data_Structures/Tree2.thy
--- a/src/HOL/Data_Structures/Tree2.thy	Mon Sep 23 07:57:58 2019 +0200
+++ b/src/HOL/Data_Structures/Tree2.thy	Mon Sep 23 08:43:52 2019 +0200
@@ -39,7 +39,7 @@
 lemma finite_set_tree[simp]: "finite(set_tree t)"
 by(induction t) auto
 
-lemma set_tree_empty: "set_tree t = {} \<longleftrightarrow> t = Leaf"
+lemma eq_set_tree_empty[simp]: "set_tree t = {} \<longleftrightarrow> t = Leaf"
 by (cases t) auto
 
 end