doc-src/Tutorial/ToyList/lemma3
author wenzelm
Wed, 26 Sep 2001 22:25:23 +0200
changeset 11573 4f85af77038f
parent 5377 efb799c5ed3c
permissions -rw-r--r--
bold symbols;

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