doc-src/Tutorial/ToyList/lemma3
author wenzelm
Tue, 11 Dec 2001 15:04:17 +0100
changeset 12463 52e4de17734e
parent 5377 efb799c5ed3c
permissions -rw-r--r--
removed altogether;

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