diff -r 2671cce4d25d -r 5f78dfb2fa7d src/HOL/Library/Quotient_List.thy
--- a/src/HOL/Library/Quotient_List.thy	Tue Oct 19 11:44:42 2010 +0900
+++ b/src/HOL/Library/Quotient_List.thy	Tue Oct 19 12:26:37 2010 +0200
@@ -40,8 +40,6 @@
   apply(simp)
   done
 
-thm list_induct3
-
 lemma list_all2_transp:
   assumes a: "equivp R"
   and b: "list_all2 R xs1 xs2"