doc-src/Tutorial/ToyList/lemma3
author wenzelm
Wed, 26 Aug 1998 18:41:00 +0200
changeset 5381 79f98b3136b9
parent 5377 efb799c5ed3c
permissions -rw-r--r--
fixed tutorial;

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