doc-src/Tutorial/ToyList/lemma3
author wenzelm
Fri, 05 May 2000 22:23:27 +0200
changeset 8809 85539b33be03
parent 5377 efb799c5ed3c
permissions -rw-r--r--
updated;

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