--- a/doc-src/TutorialI/ToyList/ToyList2 Tue Aug 28 18:46:15 2012 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,21 +0,0 @@
-lemma app_Nil2 [simp]: "xs @ [] = xs"
-apply(induct_tac xs)
-apply(auto)
-done
-
-lemma app_assoc [simp]: "(xs @ ys) @ zs = xs @ (ys @ zs)"
-apply(induct_tac xs)
-apply(auto)
-done
-
-lemma rev_app [simp]: "rev(xs @ ys) = (rev ys) @ (rev xs)"
-apply(induct_tac xs)
-apply(auto)
-done
-
-theorem rev_rev [simp]: "rev(rev xs) = xs"
-apply(induct_tac xs)
-apply(auto)
-done
-
-end