doc-src/Tutorial/ToyList/lemma3
author wenzelm
Fri, 21 May 2004 21:18:14 +0200
changeset 14772 c52060b69a8c
parent 5377 efb799c5ed3c
permissions -rw-r--r--
Type.typ_instance;

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