doc-src/Tutorial/ToyList/lemma3
author wenzelm
Fri, 06 Oct 2000 17:35:58 +0200
changeset 10168 50be659d4222
parent 5377 efb799c5ed3c
permissions -rw-r--r--
final tuning;

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