doc-src/Tutorial/ToyList/lemma3
author paulson
Wed, 22 Mar 2000 13:22:39 +0100
changeset 8555 17325ee838ab
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Suc_less_eq now with AddIffs. How could this have been overlooked?

Goal "(xs @ ys) @ zs = xs @ (ys @ zs)";
by(induct_tac "xs" 1);
by(Auto_tac);