# HG changeset patch
# User paulson
# Date 1596537903 -3600
# Node ID 3f8e6c0166ac0d644640f76f6b9e3fa3b55e8be8
# Parent  2030eacf3a723dda2d94b6da8e43fcf4bda1ff7d# Parent  b6065cbbf5e29aa281122f2f40d0c980c9cf1641
merged

diff -r b6065cbbf5e2 -r 3f8e6c0166ac src/HOL/Data_Structures/Tree2.thy
--- a/src/HOL/Data_Structures/Tree2.thy	Mon Aug 03 11:46:19 2020 +0100
+++ b/src/HOL/Data_Structures/Tree2.thy	Tue Aug 04 11:45:03 2020 +0100
@@ -36,4 +36,7 @@
 lemma set_inorder[simp]: "set (inorder t) = set_tree t"
 by (induction t) auto
 
+lemma length_inorder[simp]: "length (inorder t) = size t"
+by (induction t) auto
+
 end